ASME BPVCode i 2015 rules for construction of power boilers

ASME Boiler and
Pressure Vessel Code
An International Code

2015

R ul e s for Const ruction
of Powe r Boi l e rs

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SECTION I

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

ASME BPVC.I -2015

No fu


2015 ASME Boiler &
Pressure Vessel Code
2015 Edition

July 1, 2015

RULES FOR CONSTRUCTION
OF POWER BOILERS
ASME Boiler and Pressure Vessel Committee
on Power Boilers

Two Park Avenue • New York, NY • 10016 USA

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I

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

AN INTERNATIONAL CODE

No fu


This international code or standard was developed under procedures accredited as meeting the criteria for
American National Standards and it is an American National Standard. The Standards Committee that approved
the code or standard was balanced to assure that individuals from competent and concerned interests have
had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and
the public-at-large.
ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.
ASME does not take any position with respect to the validity of any patent rights asserted in connection with any
items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability
for infringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are
expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such
rights, is entirely their own responsibility.
Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as
government or industry endorsement of this code or standard.
ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals.
The endnotes and preamble in this document (if any) are part of this American National Standard.

ASME collective membership mark

Certification Mark

“ASME” is the trademark of The American Society of Mechanical Engineers.

No part of this document may be reproduced in any form, in an electronic
retrieval system or otherwise, without the prior written permission of the
publisher.
Library of Congress Catalog Card Number: 56-3934
Printed in the United States of America
Adopted by the Council of The American Society of Mechanical Engineers, 1914; latest edition 2015.
The American Society of Mechanical Engineers
Two Park Avenue, New York, NY 10016-5990

Copyright © 2015 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All rights reserved

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The above ASME symbol is registered in the U.S. Patent Office.

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

Date of Issuance: July 1, 2015

No fu


List of Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Statement of Policy on the Use of the Certification Mark and Code Authorization in Advertising
Statement of Policy on the Use of ASME Marking to Identify Manufactured Items . . . . . . . . . . . .
Submittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees . . . . .
Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Changes in Record Number Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cross-Referencing and Stylistic Changes in the Boiler and Pressure Vessel Code . . . . . . . . . . . . .
Part PG
PG-1
PG-2
PG-3
PG-4

PG-11
PG-12
PG-13
PG-14
PG-16
PG-17
PG-18
PG-19
PG-20
PG-21
PG-22
PG-23
PG-25
PG-26
PG-27

PG-28
PG-29
PG-30
PG-31
PG-32
PG-33

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General Requirements for all Methods of Construction . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Referenced Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forgings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Castings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipes, Tubes, and Pressure‐Containing Parts . . . . . . . . . . . . . . . . . . . . . . . . . .
Material Identified With or Produced to a Specification Not Permitted by This
Section, and Material Not Fully Identified . . . . . . . . . . . . . . . . . . . . . . . . . .
Prefabricated or Preformed Pressure Parts Furnished Without a Certification
Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Level Indicators and Connector Material . . . . . . . . . . . . . . . . . . . . . . .
Stays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rivets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabrication by a Combination of Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design Validation by Proof Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cold Forming of Austenitic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cold Forming of Creep Strength Enhanced Ferritic Steels . . . . . . . . . . . . . . .
Maximum Allowable Working Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loadings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stress Values for Calculation Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quality Factors for Steel Castings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weld Joint Strength Reduction Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylindrical Components Under Internal Pressure . . . . . . . . . . . . . . . . . . . . . .
Components Under External Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dished Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stayed Dished Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unstayed Flat Heads and Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Openings and Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Openings in Shells, Headers, and Dished Heads . . . . . . . . . . . . . . . . . . . . . . .
Compensation Required for Openings in Shells and Dished Heads . . . . . . .
iii

xv
xvii
xix
xix
xx
xxii
xxxix
xli
xlvi
xlix
1
1
1
1
1
1
2
2

3
3
3
3
6
7
10
10
10
11
11
11
11
11
13
13
14
14
15
16
16
21
24
25
25
29
29
30

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PG-5
PG-6
PG-7
PG-8
PG-9
PG-10

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Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

TABLE OF CONTENTS

No fu


PG-36
PG-37
PG-38
PG-39

PG-42
PG-43
PG-44
PG-46
PG-47
PG-48
PG-49
PG-52
PG-53
PG-55
PG-56
PG-58
PG-59
PG-60
PG-61

PG-75
PG-76
PG-77
PG-78
PG-79
PG-80
PG-81
PG-82
PG-90
PG-91
PG-93
PG-99
PG-101
PG-104

PG-105
PG-106
PG-107
PG-108
PG-109
PG-110

iv

32
32
32
34
35
35
36
39
39
40
40
41
41
41
44
44
44
48
48
51
55

55
58
59
59
62
64
71
72
72
73
77
77
77
77
77
77
78
78
78
78
78
79
80
80
80
80
81
81
82
85

85
86
86

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PG-67
PG-68
PG-69
PG-70
PG-71
PG-72
PG-73

Flanged‐in Openings in Formed Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensation Required for Openings in Flat Unstayed Heads and Flat Stayed
Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limits of Metal Available for Compensation . . . . . . . . . . . . . . . . . . . . . . . . . .
Strength of Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensation for Multiple Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Methods of Attachment of Pipe and Nozzle Necks to Vessel Walls . . . . . . . .
General Requirements for Flanges, Pipe Fittings, and Valves . . . . . . . . . . . .
Nozzle Neck Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stayed Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Staybolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of Staybolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions of Staybolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ligaments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ligaments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supports and Attachment Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading on Structural Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boiler External Piping and Boiler Proper Connections . . . . . . . . . . . . . . . . . .
Outlets and External Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Requirements for the Boiler Proper . . . . . . . . . . . . . . . . . . . . . . .
Design and Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design and Application Requirements for Miscellaneous Pipe, Valves, and
Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feedwater Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overpressure Protection Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Superheater and Reheater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification of Capacity of Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . .
Capacity of Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting of Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation of Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Requirements for Pressure Relief Valves . . . . . . . . . . . . . . . . . . . .
Fabrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cutting Plates and Other Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repairs of Defects in Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tube Holes and Ends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Permissible Out‐of‐Roundness of Cylindrical Shells . . . . . . . . . . . . . . . . . . . .
Tolerance for Formed Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Holes for Stays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Qualification of Inspectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Examination and Repair of Flat Plate in Corner Joints . . . . . . . . . . . . . . . . . .

Hydrostatic Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification by Stamping and Data Reports . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating Surface Computation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification Marks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stamping of Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stamping for Field‐Assembled Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stamping of Pressure Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stamping of Boiler Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PG-34
PG-35

No fu


Part PW
PW-1
PW-5
PW-8
PW-9
PW-10
PW-11
PW-13
PW-14
PW-15
PW-16

PW-19
PW-26
PW-27
PW-28
PW-29
PW-31
PW-33

PW-46
PW-47
PW-48
PW-49
PW-50
PW-51
PW-52
PW-53
PW-54
Part PR
PR-1
PR-2
PR-3
PR-4
PR-5
PR-6

87
87
89

Requirements for Boilers Fabricated by Welding . . . . . . . . . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design of Welded Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Volumetric Examination of Welded Butt Joints . . . . . . . . . . . . . . . . . . . . . . . .
Head‐to‐Flange Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Openings in or Adjacent to Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welded Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Requirements for Attachment Welds . . . . . . . . . . . . . . . . . . . . . . .
Welded‐In Stays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welding Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welding Qualification and Weld Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Metal Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment Tolerance, Shells and Vessels (Including Pipe or Tube Used as a
Shell) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment, Tube and Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finished Longitudinal and Circumferential Joints . . . . . . . . . . . . . . . . . . . . . .
Miscellaneous Welding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements for Postweld Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair of Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circumferential Joints in Pipes, Tubes, and Headers . . . . . . . . . . . . . . . . . . .
Joints in Valves and Other Boiler Appurtenances . . . . . . . . . . . . . . . . . . . . . .

Fabrication Rules for Bimetallic Tubes When the Clad Strength Is Included
Inspection and Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check of Welding Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check of Welder and Welding Operator Performance Qualifications . . . . . .
Check of Heat Treatment Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Qualification of Nondestructive Examination Personnel . . . . . . . . . . . . . . . .
Radiographic Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ultrasonic Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydrostatic Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

91
91
91
91
91
92
92
92
93
93
93
93
96
96
103
103
103
103

107
108
108
108
108
108
109
109
109
121
123
124
124
126
126
126
126
126
127
127
127
127
132

Requirements for Boilers Fabricated by Riveting
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strength of Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strength of Rivets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

133
133
133
133
133
133
133
133
133
133

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This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PW-34
PW-35
PW-36
PW-38
PW-39
PW-40
PW-41
PW-42
PW-44

Location of Stampings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master Data Report Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PG-111

PG-112
PG-113

No fu


PR-18
PR-19
PR-20
PR-21
PR-22
PR-23
PR-24
PR-25
PR-26
PR-27
PR-28
Part PB
PB-1

PB-8
PB-9
PB-10
PB-14
PB-15
PB-16
PB-17
PB-18
PB-19
PB-26

PB-28
PB-29
PB-30
PB-31
PB-32
PB-33
PB-46
PB-47
PB-48
PB-49
PB-50

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133
133
134
134
134
134
135
135
135
136
136
137
137

137
137
137
138
138
138
139
139
139
139
139

Requirements for Boilers Fabricated by Brazing
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brazing Filler Metals . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluxes and Atmospheres . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strength of Brazed Joints . . . . . . . . . . . . . . . . . . . . . .
Brazed Joint Efficiency . . . . . . . . . . . . . . . . . . . . . . . .
Application of Brazing Filler Metal . . . . . . . . . . . . . .
Permissible Types of Joints . . . . . . . . . . . . . . . . . . . .
Joint Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Joint Brazing Procedure . . . . . . . . . . . . . . . . . . . . . . .
Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brazed Connections . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Qualification of Brazing Procedure . . . . . . . . . . . . . .
Qualification of Brazers and Brazing Operators . . .
Cleaning of Surfaces to Be Brazed . . . . . . . . . . . . . . .
Clearance Between Surfaces to Be Brazed . . . . . . . .
Postbrazing Operations . . . . . . . . . . . . . . . . . . . . . . .
Repair of Defective Brazing . . . . . . . . . . . . . . . . . . . .
Inspection and Tests . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check of Brazing Procedure . . . . . . . . . . . . . . . . . . . .
Brazer and Brazing Operator . . . . . . . . . . . . . . . . . . .
Visual Examination . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exemptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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140
140
140
140
140
141
141
141
141
141
141
142
142
142
142
143
143
143
143
143
143
144
144
144

144
144
144
144
144
144
145

vi

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This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PB-5
PB-6
PB-7

Crushing/Compressive Strength of Plates . . . . . . . . . . .
Joint Efficiency and the Thickness of Shells and Drums
Thickness of Buttstraps . . . . . . . . . . . . . . . . . . . . . . . . . .
Longitudinal Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circumferential Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transverse Pitch (Back Pitch) of Rows of Rivets . . . . .
Preparation of Plate Edges for Calking . . . . . . . . . . . . . .
Edge Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Riveted Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reinforcement of Openings . . . . . . . . . . . . . . . . . . . . . . .
Reinforcing Shells of Watertube Boilers . . . . . . . . . . . . .

Fabrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welded Connections in Riveted Boilers . . . . . . . . . . . . .
Buttstraps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rivet Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly of Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Riveting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Joint Tightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection, Tests, and Data Reports . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hammer Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydrostatic Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PR-7
PR-8
PR-9
PR-10
PR-11
PR-12
PR-13
PR-14
PR-15
PR-16
PR-17

No fu

Part PL
PL-1
PL-2
PL-3
PL-4
PL-5
PL-6
PL-7
PL-8
PL-9
PL-10
PL-11
PL-12
PL-13
PL-14
PL-15
PL-16

145
145

Requirements For Locomotive Boilers . . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing and Stamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Stress Values for Materials . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylindrical Boiler Shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reinforcing and Doubling Plates on Unstayed Portions of the Boiler .
Requirements for Domes of Locomotive Boilers . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stayed Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mudring (Firebox Foundation Ring) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Staybolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crown Bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Arch Tubes, Circulators, and Thermic Syphons . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Gage Glasses and Water Columns . . . . . . . . . . . . . . . . . . . . . . . .
Boiler Blowoff Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feedwater Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Course of Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dry Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

146
146
146
146
146
146
146
146
146
146
149
149
149
149
149

149
149
149
149
149
149
149
149
149
150
154
154
154
156
156
156
158
159
159
160
160
160
160
160
160
166
166
166
169
169

169
170
170
170
170
170
170

vii

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This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PL-17
PL-18
PL-19
PL-20
PL-21
PL-22
PL-23
PL-24
PL-25
PL-26
PL-27
PL-28
PL-29
PL-30
PL-31
PL-32

PL-33
PL-34
PL-35
PL-36
PL-37
PL-38
PL-39
PL-40
PL-41
PL-42
PL-43
PL-44
PL-45
PL-46
PL-47
PL-48

Marking and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PB-51

No fu


PWT-1
PWT-5
PWT-8

PWT-9
PWT-11
PWT-12
PWT-13
PWT-14
PWT-15
Part PFT
PFT-1
PFT-5
PFT-8
PFT-9
PFT-10
PFT-11
PFT-12

PFT-22
PFT-23
PFT-24
PFT-25
PFT-26
PFT-27
PFT-28
PFT-29
PFT-30
PFT-31
PFT-32
PFT-40
PFT-41
PFT-42
PFT-43

PFT-44
PFT-45
PFT-46

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171
171
171
171
171
171
171
171
171
173

173
173
173

Requirements for Firetube Boilers . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thickness Requirements . . . . . . . . . . . . . . . . . . . . . .
Shell Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attachment of Heads and Tubesheets . . . . . . . . . . .
Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion Chambers . . . . . . . . . . . . . . . . . . . . . . . .
Combustion Chamber Tubesheet . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plain Circular Furnaces . . . . . . . . . . . . . . . . . . . . . . . .
Ring‐Reinforced Type . . . . . . . . . . . . . . . . . . . . . . . . .
Corrugated Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . .
Combined Plain Circular and Corrugated Type . . . .
Attachment of Furnaces . . . . . . . . . . . . . . . . . . . . . . .
Fireboxes and Waterlegs . . . . . . . . . . . . . . . . . . . . . .
Stayed Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Working Pressure for Stayed Curved Surfaces . . . .
Staying Horizontal Return Tube Boilers . . . . . . . . . .
Staying Segments of Heads . . . . . . . . . . . . . . . . . . . .
Area Supported by Stay . . . . . . . . . . . . . . . . . . . . . . .

Maximum Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Staybolts and Stays . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flexible Staybolts . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crown Bars and Girder Stays . . . . . . . . . . . . . . . . . . .
Stay Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses in Diagonal Stays . . . . . . . . . . . . . . . . . . . . .
Doors and Openings . . . . . . . . . . . . . . . . . . . . . . . . . .
Welded Door Openings . . . . . . . . . . . . . . . . . . . . . . . .
Openings in Wrapper Sheets . . . . . . . . . . . . . . . . . . .
Fireside Access Openings . . . . . . . . . . . . . . . . . . . . . .
Requirements for Inspection Openings . . . . . . . . . .
Opening Between Boiler and Pressure Relief Valve
Domes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements for Domes . . . . . . . . . . . . . . . . . . . . . .
Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Method of Support . . . . . . . . . . . . . . . . . . . . . . . . . . .

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174
174
174
174
174
174
174
174
174
174
175
176
176
177
177
177
178
178
178
179
180
180
180
182

182
182
182
183
184
184
185
185
186
186
186
186
186
186
186
186
187
187

viii

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This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PFT-13
PFT-14
PFT-15
PFT-17
PFT-18
PFT-19
PFT-20
PFT-21

Requirements for Watertube Boilers . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tubes and Pipe . . . . . . . . . . . . . . . . . . . . . . . . .
Tube Connections . . . . . . . . . . . . . . . . . . . . . . .
Staybolting Box‐Type Headers and Waterlegs
Staying Segment of Heads . . . . . . . . . . . . . . . .
Firing Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access and Firing Doors . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

Part PWT

No fu


Part PFH
PFH-1
Part PMB
PMB-1
PMB-2
PMB-5
PMB-8
PMB-9
PMB-10

PMB-11
PMB-12
PMB-13
PMB-14
PMB-15
PMB-16
PMB-17
PMB-21
Part PEB

PEB-5
PEB-8
PEB-9
PEB-10
PEB-11
PEB-12
PEB-13
PEB-14
PEB-15
PEB-16
PEB-17
PEB-18
PEB-19
Part PVG
PVG-1
PVG-5
PVG-8
PVG-9
PVG-10

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187
187
188
188

Optional Requirements for Feedwater Heater (When Located Within
Scope of Section I Rules) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................................................

189
189

Requirements for Miniature Boilers .
General . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welding . . . . . . . . . . . . . . . . . . . . . . . . . .
Washout Openings . . . . . . . . . . . . . . . . .
Feedwater Supply . . . . . . . . . . . . . . . . . .
Blowoff . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Gages . . . . . . . . . . . . . . . . . . . . . . .
Fixtures and Fittings . . . . . . . . . . . . . . . .
Pressure Relief Valves . . . . . . . . . . . . . .
Steam Stop Valves . . . . . . . . . . . . . . . . . .
Automatic Devices . . . . . . . . . . . . . . . . . .
Hydrostatic Tests and Inspection . . . . .

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190
190
190
190
190
190
190
190
190
190
191
191
191
191
191
191
191
191

Requirements for Electric Boilers . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Requirements for the Boiler Pressure Vessel
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feedwater Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blowoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Level Indicators . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydrostatic Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Stamping of Boilers . . . . . . . . . . . . . . .
Manufacturer’s Data Report for Electric Boilers . . . . .

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192
192
192
192
192
192
192

193
193
193
193
193
193
193
193
193
194
194
194
195

Requirements for Organic Fluid Vaporizers
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Requirements . . . . . . . . . . . . . . . . . . . .
Gage Glasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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196
196
196
196
196
196

196
196
196

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ix

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This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PEB-1
PEB-2
PEB-3

Piping, Fittings, and Appliances
Water Level Indicators . . . . . . .
Feed Piping . . . . . . . . . . . . . . . .
Blowoff Piping . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PFT-47
PFT-48
PFT-49

No fu


Drain Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

196

196

Part PFE
PFE-1
PFE-2
PFE-3
PFE-4

Requirements for Feedwater Economizers
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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198
198
198
198
198

Part PHRSG
PHRSG-1
PHRSG-2
PHRSG-3

199
199
199

PHRSG-4
PHRSG-5

Requirements for Heat Recovery Steam Generators . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements for Superheater and Reheater Condensate Removal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Desuperheater Drain Pots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

199
199
200

Mandatory Appendix II

Standard Units for Use in Equations

..............................

203

Mandatory Appendix III

Criteria for Reapplication of a Certification Mark . . . . . . . . . . . . . . . . . . .

204

Mandatory Appendix IV

Local Thin Areas in Cylindrical Shells and in Spherical Segments of
Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

207

Mandatory Appendix V

Additional Rules for Boilers Fabricated by Riveting . . . . . . . . . . . . . . . .

211

Mandatory Appendix VI

Establishing Governing Code Editions, Addenda, and Cases for Boilers
and Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

215

Explanation of the Code Containing Matter Not Mandatory Unless Specifically Referred to in the Rules of the Code . . . . . . . . . . . . . . . . . . . . .

217

Positive Material Identification Practice . . . . . . . . . . . . . . . . . . . . . . . . . . .

317

Nonmandatory Appendix A
Nonmandatory Appendix B

PG-52.2
PG-52.3
PG-52.4
PG-52.5
PG-53.3
PG-56.1.2
PG-56.2
PG-58.3.1(a)
PG-58.3.1(b)
PG-58.3.1(c)
PG-58.3.2

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Maximum Internal Projection of Welded Access or Inspection Openings . . . . . . . . . . . . . . . .
Some Acceptable Types of Unstayed Flat Heads and Covers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nomenclature and Equations for Reinforced Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Representative Configurations Describing the Dimensions t e , h, and d . . . . . . . . . . . . .
Chart for Determining Value of F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illustrations of the Rule Given in PG-38.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welding End Transitions Maximum Envelope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acceptable Proportions for Ends of Through‐Stays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagram for Determining the Efficiency of Longitudinal and Diagonal Ligaments Between
Openings in Cylindrical Shells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example of Tube Spacing With Pitch of Holes Equal in Every Row . . . . . . . . . . . . . . . . . . . . .
Example of Tube Spacing With Pitch of Holes Unequal in Every Second Row . . . . . . . . . . . .
Example of Tube Spacing With Pitch of Holes Varying in Every Second and Third Row . . . .
Example of Tube Spacing With Tube Holes on Diagonal Lines . . . . . . . . . . . . . . . . . . . . . . . . .
Diagram for Determining Equivalent Longitudinal Efficiency of Diagonal Ligaments Between
Openings in Cylindrical Shells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Method of Computation of Attachments to Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart for Determining Load Factor, L f . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Code Jurisdictional Limits for Piping — Drum‐Type Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Code Jurisdictional Limits for Piping — Isolable Economizers Located in Feedwater Piping and

Isolable Superheaters in Main Steam Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Code Jurisdictional Limits for Piping — Reheaters and Nonintegral Separately Fired Superheaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Code Jurisdictional Limits for Piping — An Example of Forced‐Flow Steam Generators With No
Fixed Steam or Waterline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

x

22
26
31
33
34
35
38
40
42
43
43
43
44
45
46
47
49
50
51
52

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

FIGURES
PG-28
PG-31
PG-33.1
PG-33.2
PG-33.3
PG-38
PG-42.1
PG-46.2
PG-52.1

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Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PVG-11
PVG-12

No fu


PG-59.1
PG-60.3.7
PG-60.3.9
PG-67.4
PG-80

PG-105.1
PG-106
PW-9.3.1
PW-9.3.3
PW-9.4
PW-15
PW-16.1
PW-16.2
PW-16.8

xi

53
54
57
58
61
79
82
83
92
94
95
97
98
102
104
106
106
128

129
130
131
135
136
137
138
142
147
148
150
151
151
153
157
159
159
160
161
162
163
164
164
165
166
167
168
168
169
172

175
177

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PW-19.4(a)
PW-19.4(b)
PW-53.1
PW-53.2
PW-53.3(a)
PW-53.3(b)
PR-13-1
PR-15.4-1
PR-17.2-1
PR-20.2-1
PB-15
PL-2.2-1
PL-2.2-2
PL-20.4.1-1
PL-20.4.2-1
PL-20.5-1
PL-21.4.1-1
PL-27.5-1
PL-27.6.3-1
PL-27.6.3-2
PL-27.7-1
PL-28.2-1
PL-33-1
PL-36.2.1-1
PL-36.5-1

PL-36.7-1
PL-36.9-1
PL-36.9-2
PL-39.1-1
PL-39.2.1-1
PL-39.2.1-2
PL-39.3-1
PWT-11
PFT-12.1
PFT-17.2

Code Jurisdictional Limits for Piping — An Example of Steam Separator Type Forced-Flow
Steam Generators With No Fixed Steam or Waterline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Boiler Bushings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Y‐Type Globe Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Arrangement of Steam and Water Connections for a Water Column . . . . . . . . . . . . .
Requirements for Overpressure Protection Forced‐Flow Steam Generator . . . . . . . . . . . . . . .
Maximum Permissible Deviation From a Circular Form, e , for Cylindrical Parts Under External
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Official Certification Mark to Denote the American Society of Mechanical Engineers’ Standard
for Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Form of Stamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Butt Welding of Plates of Unequal Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heads Attached to Shells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prohibited Welded Joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Examples of Weld Strength Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Acceptable Types of Welded Nozzles and Other Connections to Shells, Drums, and
Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Acceptable Forms of Welds for Lugs, Hangers, and Brackets on Shells, Drums, and
Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Some Acceptable Designs for Partial-Penetration-Weld-Type Attachments Designed for 900°F
(480°C) or Higher Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Acceptable Types of Diagonal Braces for Installation by Welding . . . . . . . . . . . . . . . . .
Unacceptable Types of Diagonal Braces for Installation by Welding . . . . . . . . . . . . . . . . . . . .
Test Specimens From Longitudinal Welded Test Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Method of Forming Longitudinal Test Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Details of Tension Test Specimens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Details of Bend Test Specimens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Plate Edge Beveled for Sealing by Calking in a Riveted Joint . . . . . . . . . . . . . . . . . . . .
Location of Seams in Inside and Outside Calking Boundaries . . . . . . . . . . . . . . . . . . . . . . . . . .
Boundary of Reinforcing Plate on Outside and Inside of Drum . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Welding of Plate Edges at Ends of Buttstraps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Acceptable Types of Brazed Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steam Locomotive Boiler With Dome Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steam Locomotive Boiler With Front-End Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Round Riveted Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diamond Riveted Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manhole Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steam Dome Top Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Examples of Doubler Attachment Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Double-Riveted Lap Seam in Stayed Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Double-Fillet-Welded Lap Seam in Stayed Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Upper Corner of Firebox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Examples of Acceptable Mudring Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example of Crown Bar Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Support Perimeters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Forms of Diagonal Braces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Forms of Gusset Braces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tee Iron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tee-Iron Support Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Arch Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circulator Attachment Section Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example of Thermic Syphon Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Examples of Acceptable Forms of Tube Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Acceptable Forms of Tube Attachment on Firetube Boilers . . . . . . . . . . . . . . . . . . . . . .
Acceptable Type of Ring‐Reinforced Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PG-58.3.3

No fu


xii

178
179
179
180
181
183
184
185
188
188
197
201
208

209
209
209
210
210
211
212
213
214
217
218
218
219
219
220
221
227
233
235
236
237
243
245
247
247
247
248
249
254
254

255
256
256
257
258
259
300
310

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PFT-46.2
PVG-12
PHRSG-4
IV-2-1
IV-3-1
IV-3-2
IV-3-3
IV-3-4
IV-3-5
V-2.2-1
V-2.2-2
V-4-1
V-5-1
A-2-1
A-3-1
A-4-1
A-5-1
A-6-1
A-6-2

A-8
A-19
A-66
A-67
A-68
A-69
A-70.1
A-70.2
A-71
A-72
A-73
A-74
A-75-1
A-250.3.4-1
A-250.3.4-2
A-250.3.6-1
A-250.3.6-2
A-250.3.6-3
A-250.3.6-4
A-250.3.6-5
A-250.3.6-6
A-357
A-370

Morison Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connection Between Plain and Corrugated Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welding Ogee Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Some Acceptable Methods of Forming Waterleg Joints by Welding . . . . . . . . . . . . . . . . . . . . .
Stayed Wrapper Sheet of Locomotive‐Type Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example of Staying of Heads Adjacent to Cylindrical Furnaces . . . . . . . . . . . . . . . . . . . . . . . . .

Pitch of Staybolts Adjacent to Upper Corners of Fireboxes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurements for Determining Stresses in Diagonal Stays . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spacing and Weld Details for Wall‐Support Lugs Set in Pairs on Horizontal‐Return Tubular
Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Welded Bracket Connection for Horizontal‐Return Tubular Boilers . . . . . . . . . . . . . . . . . . . . .
Constant, C, for Vapor Related to Ratio of Specific Heats (k = c p /c v ) . . . . . . . . . . . . . . . . . . .
Some Acceptable Desuperheater Spraywater Protection Device Arrangements . . . . . . . . . . .
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blend Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..............................................................................
..............................................................................
..............................................................................
..............................................................................
Riveted Circumferential Joint for Circular Furnace Plates Over 5/8 in. (16 mm) . . . . . . . . . . .
Proper Location of Staybolts Adjacent to Longitudinal Joint in Furnace Sheet . . . . . . . . . . . .
Staying of Head With Steel Angles in Tubular Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Method of Riveting Manhole Frames to Shells or Drums With Two Rows of Rivets . . . . . . .
Single-Riveted Lap Joint, Longitudinal or Circumferential . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Double-Riveted Lap Joint, Longitudinal or Circumferential . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Double-Riveted Buttstrap and Double-Strap Joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triple-Riveted Buttstrap and Double-Strap Joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quadruple-Riveted Buttstrap and Double-Strap Joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Joints That May Be Used to Avoid Eccentric Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detail Illustrations Showing Application of PG-48 and PFT-27 to the Staying of Boilers . . .
Typical Forms of Fusible Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example for Typical Nozzle Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example for Typical Nozzle Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example for Typical Nozzle Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example for Typical Nozzle Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example for Typical Nozzle Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Example for Typical Nozzle Computations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structural Attachment With Radial Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structural Attachment With Eccentric Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structural Attachment With Moment Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structural Attachment on Tube Bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example of Nozzle Attached by Riveting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Aligned Rounded Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Groups of Aligned Rounded Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charts for t 1/8 in. (3 mm) to 1/4 in. (6 mm), Inclusive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charts for t Over 1/4 in. (6 mm) to 3/8 in. (10 mm), Inclusive . . . . . . . . . . . . . . . . . . . . . . . . . .
Charts for t Over 3/8 in. (10 mm) to 3/4 in. (19 mm), Inclusive . . . . . . . . . . . . . . . . . . . . . . . . .
Charts for t Over 3/4 in. (19 mm) to 2 in. (50 mm), Inclusive . . . . . . . . . . . . . . . . . . . . . . . . . .
Charts for t Over 2 in. (50 mm) to 4 in. (100 mm), Inclusive . . . . . . . . . . . . . . . . . . . . . . . . . .
Charts for t Over 4 in. (100 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide to Data Report Forms Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample Certificate of Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

PFT-18.1
PFT-19
PFT-20
PFT-21
PFT-23.1
PFT-25
PFT-27
PFT-32
PFT-46.1

No fu

PG-39
PG-56.2
PG-67.5
PG-67.5M
PG-68.7
PG-68.7M
PW-11
PW-33
PW-39-1
PW-39-2
PW-39-3
PW-39-4
PW-39-5
PW-39-6
PW-39-7
PW-39-8

PW-39-10
PW-39-11
PW-39-12
PW-39-13
PW-39-14
PW-39.1
PR-9-1
PR-15.3-1
PB-1
PB-16
PL-21.3.4-1

PL-24.1-1
PL-28.4-1
PHRSG-4
II-1

V-4-1

xiii

12
14

17
36
47
63
65
67
69
95
108
111
112
113
114
115
116
117
117
118

118
119
119
120
120
121
134
136
141
143
152
155
162
202
203
206
213

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

PW-39-9

Post Cold‐Forming Strain Limits and Heat‐Treatment Requirements . . . . . . . . . . . . . . . . . . . .
Post Cold‐Forming Strain Limits and Heat‐Treatment Requirements . . . . . . . . . . . . . . . . . . . .
Weld Strength Reduction Factors to Be Applied When Calculating Maximum Allowable Working
Pressure or Minimum Required Thickness of Components Fabricated With a Longitudinal
Seam Weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Number of Threads Per Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tube Attachment Angle Design Factor, K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supercritical Correction Factor, K s c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supercritical Correction Factor, K s c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Superheat Correction Factor, K s h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Superheat Correction Factor, K s h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Volumetric Examination of Welded Butt Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment Tolerance of Sections to Be Butt Welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 5A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 15E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 10H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 10I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments

— P-No. 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mandatory Requirements for Postweld Heat Treatment of Pressure Parts and Attachments
— P-No. 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternate Postweld Heat Treatment Requirements for Carbon and Low Alloy Steels . . . . . . .
Minimum Thickness of Buttstraps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Stress on Rivets in Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Design Temperatures for Brazing Filler Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Joint Clearance at Brazing Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thickness of Riveted Reinforcing Rings for Dome Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Allowable Working Pressure for Steel Flues for Firetube Locomotive Boilers . . . .
Radii for Firebox Mudrings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Drain Pot Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Units for Use in Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing the Certificate of Conformance for Reapplication of the Certification
Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sizes of Angles Required for Staying Segments of Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

TABLES
PG-19
PG-20
PG-26

No fu


A-354
A-354.1
A-354.2

A-355
A-356
A-358
A-359
A-360
A-370
B-1

Certificate of Conformance for Reapplication of the Certification Mark . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report for All Types of Boilers Except Watertube and Electric . . . . . . . . . .
Manufacturer’s Data Report for All Types of Electric Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report for Electric Superheaters and Reheaters . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report for Watertube Boilers, Superheaters, Waterwalls, and Economizers
Engineering-Contractor Data Report for a Complete Boiler Unit . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Partial Data Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report for Fabricated Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report for Field Installed Mechanically Assembled Piping . . . . . . . . . . . . . .
Summary Data Report for Process Steam Generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report Supplementary Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s Data Report for Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer’s or Assembler’s Certificate of Conformance for Pressure Relief Valves . . . . . . . . .
Manufacturer’s Data Report for Locomotive Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

285
288
291
293
295
299
302

307
308
309
319

.
.
.
.
.
.
.
.
.
.
.
.
.
.

205
265
269
274
278
283
286
289
292
294

296
297
301
303

ENDNOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

321

xiv

.
.
.
.
.
.
.
.
.
.
.
.
.
.

231
251
253
267

272
276
281

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

FORMS
III-1A
P-2
P-2A
P-2B
P-3
P-3A
P-4
P-4A
P-4B
P-5
P-6
P-7
P-8
PL-1

Guide for Estimating Steaming Capacity Based on Heating Surface . . . . . . . . . . . . . . . . . . . . . .
...............................................................................
Maximum Permissible Size of Rounded Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report, Form P-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report, Form P-2A . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report, Form P-2B . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report, Form P-3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Engineering-Contractor Data Report for a Complete Boiler Unit, Form

P-3A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Partial Data Report, Form P-4 . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report, Form P-4A . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report, Form P-4B . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Summary Data Report for Process Steam Generators, Form P-5 . . . . .
Guide for Completing Manufacturer’s Data Report for Pressure Relief Valves, Form P-7 . . . .
Guide for the Preparation of Manufacturer’s or Assembler’s Certificate of Conformance, Form
P-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide for Completing Manufacturer’s Data Report for Locomotive Boilers, Form PL-1 . . . . . .
Codes, Standards, and Specifications Referenced in Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide to Information Appearing on Certificate of Authorization . . . . . . . . . . . . . . . . . . . . . . . .
Identification Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

A-44
A-75-1
A-250.3.2
A-351
A-351.1
A-351.2
A-352
A-353

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Materials
• Part A — Ferrous Material Specifications
• Part B — Nonferrous Material Specifications

• Part C — Specifications for Welding Rods, Electrodes, and Filler Metals
• Part D — Properties (Customary)
• Part D — Properties (Metric)

III

Rules for Construction of Nuclear Facility Components
• Subsection NCA — General Requirements for Division 1 and Division 2
• Appendices
• Division 1
– Subsection NB — Class 1 Components
– Subsection NC — Class 2 Components
– Subsection ND — Class 3 Components
– Subsection NE — Class MC Components
– Subsection NF — Supports
– Subsection NG — Core Support Structures
– Subsection NH — Class 1 Components in Elevated Temperature Service*
• Division 2 — Code for Concrete Containments
• Division 3 — Containments for Transportation and Storage of Spent Nuclear Fuel and High Level Radioactive
Material and Waste
• Division 5 — High Temperature Reactors

IV

Rules for Construction of Heating Boilers

V

Nondestructive Examination

VI

Recommended Rules for the Care and Operation of Heating Boilers

VII

Recommended Guidelines for the Care of Power Boilers

VIII Rules for Construction of Pressure Vessels
• Division 1
• Division 2 — Alternative Rules
• Division 3 — Alternative Rules for Construction of High Pressure Vessels
IX

Welding, Brazing, and Fusing Qualifications

X

Fiber-Reinforced Plastic Pressure Vessels

XI

Rules for Inservice Inspection of Nuclear Power Plant Components

XII

Rules for Construction and Continued Service of Transport Tanks

*
The 2015 Edition of Section III is the last edition in which Section III, Division 1, Subsection NH, Class 1 Components in Elevated Temperature

Service, will be published. The requirements located within Subsection NH have been moved to Section III, Division 5, Subsection HB, Subpart B
for the elevated temperature construction of Class A components.

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II

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LIST OF SECTIONS
SECTIONS
I
Rules for Construction of Power Boilers

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Interpretations of the Code have historically been posted in January and July at Interpretations issued during the previous two calendar years are included with the publication of the applicable Section of the Code in the 2015 Edition. Interpretations of Section III, Divisions 1 and 2 and Section III Appendices
are included with Subsection NCA.
Following the 2015 Edition, interpretations will not be included in editions; they will be issued in real time in ASME's
Interpretations Database at Historical BPVC interpretations may also be found in
the Database.

CODE CASES
The Boiler and Pressure Vessel Code committees meet regularly to consider proposed additions and revisions to the
Code and to formulate Cases to clarify the intent of existing requirements or provide, when the need is urgent, rules for

materials or constructions not covered by existing Code rules. Those Cases that have been adopted will appear in the
appropriate 2015 Code Cases book: “Boilers and Pressure Vessels” or “Nuclear Components.” Supplements will be sent
or made available automatically to the purchasers of the Code Cases books up to the publication of the 2017 Code.

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INTERPRETATIONS

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*

The information contained in this Foreword is not part of this American National Standard (ANS) and has not been processed in accordance
with ANSI's requirements for an ANS. Therefore, this Foreword may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Code.
**
Construction, as used in this Foreword, is an all-inclusive term comprising materials, design, fabrication, examination, inspection, testing,
certification, and pressure relief.

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In 1911, The American Society of Mechanical Engineers established the Boiler and Pressure Vessel Committee to formulate standard rules for the construction of steam boilers and other pressure vessels. In 2009, the Boiler and Pressure
Vessel Committee was superseded by the following committees:
(a) Committee on Power Boilers (I)

(b) Committee on Materials (II)
(c) Committee on Construction of Nuclear Facility Components (III)
(d) Committee on Heating Boilers (IV)
(e) Committee on Nondestructive Examination (V)
(f) Committee on Pressure Vessels (VIII)
(g) Committee on Welding, Brazing, and Fusing (IX)
(h) Committee on Fiber-Reinforced Plastic Pressure Vessels (X)
(i) Committee on Nuclear Inservice Inspection (XI)
(j) Committee on Transport Tanks (XII)
(k) Technical Oversight Management Committee (TOMC)
Where reference is made to “the Committee” in this Foreword, each of these committees is included individually and
collectively.
The Committee’s function is to establish rules of safety relating only to pressure integrity, which govern the
construction** of boilers, pressure vessels, transport tanks, and nuclear components, and the inservice inspection of nuclear components and transport tanks. The Committee also interprets these rules when questions arise regarding their
intent. The technical consistency of the Sections of the Code and coordination of standards development activities of the
Committees is supported and guided by the Technical Oversight Management Committee. This Code does not address
other safety issues relating to the construction of boilers, pressure vessels, transport tanks, or nuclear components, or
the inservice inspection of nuclear components or transport tanks. Users of the Code should refer to the pertinent codes,
standards, laws, regulations, or other relevant documents for safety issues other than those relating to pressure integrity. Except for Sections XI and XII, and with a few other exceptions, the rules do not, of practical necessity, reflect the
likelihood and consequences of deterioration in service related to specific service fluids or external operating environments. In formulating the rules, the Committee considers the needs of users, manufacturers, and inspectors of pressure
vessels. The objective of the rules is to afford reasonably certain protection of life and property, and to provide a margin
for deterioration in service to give a reasonably long, safe period of usefulness. Advancements in design and materials
and evidence of experience have been recognized.
This Code contains mandatory requirements, specific prohibitions, and nonmandatory guidance for construction activities and inservice inspection and testing activities. The Code does not address all aspects of these activities and those
aspects that are not specifically addressed should not be considered prohibited. The Code is not a handbook and cannot
replace education, experience, and the use of engineering judgment. The phrase engineering judgement refers to technical judgments made by knowledgeable engineers experienced in the application of the Code. Engineering judgments
must be consistent with Code philosophy, and such judgments must never be used to overrule mandatory requirements
or specific prohibitions of the Code.
The Committee recognizes that tools and techniques used for design and analysis change as technology progresses
and expects engineers to use good judgment in the application of these tools. The designer is responsible for complying

with Code rules and demonstrating compliance with Code equations when such equations are mandatory. The Code
neither requires nor prohibits the use of computers for the design or analysis of components constructed to the

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FOREWORD*

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requirements of the Code. However, designers and engineers using computer programs for design or analysis are cautioned that they are responsible for all technical assumptions inherent in the programs they use and the application of
these programs to their design.
The rules established by the Committee are not to be interpreted as approving, recommending, or endorsing any proprietary or specific design, or as limiting in any way the manufacturer's freedom to choose any method of design or any
form of construction that conforms to the Code rules.
The Committee meets regularly to consider revisions of the rules, new rules as dictated by technological development,
Code Cases, and requests for interpretations. Only the Committee has the authority to provide official interpretations of
this Code. Requests for revisions, new rules, Code Cases, or interpretations shall be addressed to the Secretary in writing
and shall give full particulars in order to receive consideration and action (see Submittal of Technical Inquiries to the
Boiler and Pressure Vessel Standards Committees). Proposed revisions to the Code resulting from inquiries will be presented to the Committee for appropriate action. The action of the Committee becomes effective only after confirmation
by ballot of the Committee and approval by ASME. Proposed revisions to the Code approved by the Committee are submitted to the American National Standards Institute (ANSI) and published at to
invite comments from all interested persons. After public review and final approval by ASME, revisions are published at
regular intervals in Editions of the Code.

The Committee does not rule on whether a component shall or shall not be constructed to the provisions of the Code.
The scope of each Section has been established to identify the components and parameters considered by the Committee
in formulating the Code rules.
Questions or issues regarding compliance of a specific component with the Code rules are to be directed to the ASME
Certificate Holder (Manufacturer). Inquiries concerning the interpretation of the Code are to be directed to the Committee. ASME is to be notified should questions arise concerning improper use of an ASME Certification Mark.
When required by context in this Section, the singular shall be interpreted as the plural, and vice versa, and the feminine, masculine, or neuter gender shall be treated as such other gender as appropriate.

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ASME has established procedures to authorize qualified organizations to perform various activities in accordance
with the requirements of the ASME Boiler and Pressure Vessel Code. It is the aim of the Society to provide recognition
of organizations so authorized. An organization holding authorization to perform various activities in accordance with
the requirements of the Code may state this capability in its advertising literature.
Organizations that are authorized to use the Certification Mark for marking items or constructions that have been
constructed and inspected in compliance with the ASME Boiler and Pressure Vessel Code are issued Certificates of
Authorization. It is the aim of the Society to maintain the standing of the Certification Mark for the benefit of the users,
the enforcement jurisdictions, and the holders of the Certification Mark who comply with all requirements.
Based on these objectives, the following policy has been established on the usage in advertising of facsimiles of the
Certification Mark, Certificates of Authorization, and reference to Code construction. The American Society of Mechanical
Engineers does not “approve,” “certify,” “rate,” or “endorse” any item, construction, or activity and there shall be no statements or implications that might so indicate. An organization holding the Certification Mark and/or a Certificate of
Authorization may state in advertising literature that items, constructions, or activities “are built (produced or performed) or activities conducted in accordance with the requirements of the ASME Boiler and Pressure Vessel Code,”
or “meet the requirements of the ASME Boiler and Pressure Vessel Code.” An ASME corporate logo shall not be used
by any organization other than ASME.
The Certification Mark shall be used only for stamping and nameplates as specifically provided in the Code. However,
facsimiles may be used for the purpose of fostering the use of such construction. Such usage may be by an association or
a society, or by a holder of the Certification Mark who may also use the facsimile in advertising to show that clearly specified items will carry the Certification Mark. General usage is permitted only when all of a manufacturer’s items are
constructed under the rules.

The ASME Boiler and Pressure Vessel Code provides rules for the construction of boilers, pressure vessels, and nuclear

components. This includes requirements for materials, design, fabrication, examination, inspection, and stamping. Items
constructed in accordance with all of the applicable rules of the Code are identified with the official Certification Mark
described in the governing Section of the Code.
Markings such as “ASME,” “ASME Standard,” or any other marking including “ASME” or the Certification Mark shall not
be used on any item that is not constructed in accordance with all of the applicable requirements of the Code.
Items shall not be described on ASME Data Report Forms nor on similar forms referring to ASME that tend to imply
that all Code requirements have been met when, in fact, they have not been. Data Report Forms covering items not fully
complying with ASME requirements should not refer to ASME or they should clearly identify all exceptions to the ASME
requirements.

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STATEMENT OF POLICY ON THE USE OF ASME MARKING TO
IDENTIFY MANUFACTURED ITEMS

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STATEMENT OF POLICY ON THE USE OF THE CERTIFICATION
MARK AND CODE AUTHORIZATION IN ADVERTISING

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SUBMITTAL OF TECHNICAL INQUIRIES TO THE BOILER AND
PRESSURE VESSEL STANDARDS COMMITTEES
1

INTRODUCTION

(a) The following information provides guidance to Code users for submitting technical inquiries to the committees.
See Guideline on the Approval of New Materials Under the ASME Boiler and Pressure Vessel Code in Section II, Parts C
and D for additional requirements for requests involving adding new materials to the Code. Technical inquiries include
requests for revisions or additions to the Code rules, requests for Code Cases, and requests for Code Interpretations, as
described below.
(1) Code Revisions. Code revisions are considered to accommodate technological developments, address administrative requirements, incorporate Code Cases, or to clarify Code intent.
(2) Code Cases. Code Cases represent alternatives or additions to existing Code rules. Code Cases are written as a
question and reply, and are usually intended to be incorporated into the Code at a later date. When used, Code Cases
prescribe mandatory requirements in the same sense as the text of the Code. However, users are cautioned that not
all jurisdictions or owners automatically accept Code Cases. The most common applications for Code Cases are:
(-a) to permit early implementation of an approved Code revision based on an urgent need
(-b) to permit the use of a new material for Code construction
(-c) to gain experience with new materials or alternative rules prior to incorporation directly into the Code
(3) Code Interpretations. Code Interpretations provide clarification of the meaning of existing rules in the Code, and
are also presented in question and reply format. Interpretations do not introduce new requirements. In cases where
existing Code text does not fully convey the meaning that was intended, and revision of the rules is required to support
an interpretation, an Intent Interpretation will be issued and the Code will be revised.

(c) Inquiries that do not comply with these provisions or that do not provide sufficient information for a committee’s
full understanding may result in the request being returned to the inquirer with no action.

2

INQUIRY FORMAT
Submittals to a committee shall include:
(a) Purpose. Specify one of the following:
(1) revision of present Code rules
(2) new or additional Code rules
(3) Code Case

(4) Code Interpretation

(b) Background. Provide the information needed for the committee’s understanding of the inquiry, being sure to include reference to the applicable Code Section, Division, edition, addenda (if applicable), paragraphs, figures, and tables.
Preferably, provide a copy of the specific referenced portions of the Code.
(c) Presentations. The inquirer may desire or be asked to attend a meeting of the committee to make a formal presentation or to answer questions from the committee members with regard to the inquiry. Attendance at a committee meeting shall be at the expense of the inquirer. The inquirer’s attendance or lack of attendance at a meeting shall not be a
basis for acceptance or rejection of the inquiry by the committee.
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(b) The Code rules, Code Cases, and Code Interpretations established by the committees are not to be considered as
approving, recommending, certifying, or endorsing any proprietary or specific design, or as limiting in any way the freedom of manufacturers, constructors, or owners to choose any method of design or any form of construction that conforms to the Code rules.

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CODE REVISIONS OR ADDITIONS

Requests for Code revisions or additions shall provide the following:
(a) Proposed Revisions or Additions. For revisions, identify the rules of the Code that require revision and submit a copy
of the appropriate rules as they appear in the Code, marked up with the proposed revision. For additions, provide the
recommended wording referenced to the existing Code rules.
(b) Statement of Need. Provide a brief explanation of the need for the revision or addition.
(c) Background Information. Provide background information to support the revision or addition, including any data
or changes in technology that form the basis for the request that will allow the committee to adequately evaluate the
proposed revision or addition. Sketches, tables, figures, and graphs should be submitted as appropriate. When applicable, identify any pertinent paragraph in the Code that would be affected by the revision or addition and identify paragraphs in the Code that reference the paragraphs that are to be revised or added.

4

CODE CASES

Requests for Code Cases shall provide a Statement of Need and Background Information similar to that defined in 3(b)
and 3(c), respectively, for Code revisions or additions. The urgency of the Code Case (e.g., project underway or imminent,
new procedure, etc.) must be defined and it must be confirmed that the request is in connection with equipment that will
bear the Certification Mark, with the exception of Section XI applications. The proposed Code Case should identify the
Code Section and Division, and be written as a Question and a Reply in the same format as existing Code Cases. Requests
for Code Cases should also indicate the applicable Code editions and addenda (if applicable) to which the proposed Code
Case applies.

5

CODE INTERPRETATIONS

6

SUBMITTALS

Submittals to and responses from the committees shall meet the following:
(a) Submittal. Inquiries from Code users shall be in English and preferably be submitted in typewritten form; however,
legible handwritten inquiries will also be considered. They shall include the name, address, telephone number, fax number, and e-mail address, if available, of the inquirer and be mailed to the following address:
Secretary
ASME Boiler and Pressure Vessel Committee
Two Park Avenue
New York, NY 10016-5990
As an alternative, inquiries may be submitted via e-mail to: or via our online tool at
/>(b) Response. The Secretary of the appropriate committee shall acknowledge receipt of each properly prepared inquiry and shall provide a written response to the inquirer upon completion of the requested action by the committee.

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(a) Requests for Code Interpretations shall provide the following:
(1) Inquiry. Provide a condensed and precise question, omitting superfluous background information and, when
possible, composed in such a way that a “yes” or a “no” Reply, with brief provisos if needed, is acceptable. The question
should be technically and editorially correct.
(2) Reply. Provide a proposed Reply that will clearly and concisely answer the Inquiry question. Preferably, the Reply
should be “yes” or “no,” with brief provisos if needed.
(3) Background Information. Provide any background information that will assist the committee in understanding
the proposed Inquiry and Reply.
(b) Requests for Code Interpretations must be limited to an interpretation of a particular requirement in the Code or a
Code Case. The committee cannot consider consulting type requests such as the following:
(1) a review of calculations, design drawings, welding qualifications, or descriptions of equipment or parts to determine compliance with Code requirements;
(2) a request for assistance in performing any Code-prescribed functions relating to, but not limited to, material
selection, designs, calculations, fabrication, inspection, pressure testing, or installation;
(3) a request seeking the rationale for Code requirements.

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3

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PERSONNEL
ASME Boiler and Pressure Vessel Standards Committees,
Subgroups, and Working Groups
January 1, 2015

MARINE CONFERENCE GROUP

TECHNICAL OVERSIGHT MANAGEMENT COMMITTEE (TOMC)
T. P. Pastor, Chair
R. W. Barnes, Vice Chair
J. S. Brzuszkiewicz, Staff Secretary
R. J. Basile
J. E. Batey
T. L. Bedeaux
D. L. Berger
D. A. Canonico
A. Chaudouet
D. B. DeMichael
R. P. Deubler
P. D. Edwards
J. G. Feldstein
R. E. Gimple
M. Gold
T. E. Hansen
G. W. Hembree

J. G. Hungerbuhler, Jr.
G. Nair

J. F. Henry
R. S. Hill III
G. G. Karcher
W. M. Lundy
J. R. MacKay

W. E. Norris
G. C. Park
M. D. Rana
R. F. Reedy, Sr.
B. W. Roberts
S. C. Roberts
F. J. Schaaf, Jr.
A. Selz
B. F. Shelley
W. J. Sperko
R. W. Swayne
C. Withers

CONFERENCE COMMITTEE

A. J. Justin
W. G. Knecht
J. LeCoff
T. G. McCarty
G. C. Millman
R. A. Moen
R. F. Reedy, Sr.

D. E. Mallory — New Hampshire
W. McGivney — New York
U. Merkle — Iowa
M. S. Moore — Michigan
S. V. Nelson — Colorado
C. C. Novak — Illinois
T. Oda — Washington

R. P. Pate — Alabama
M. K. Perdue — Oregon
M. Poehlmann — Alberta, Canada
J. F. Porcella — West Virginia
A. Pratt — Connecticut
C. F. Reyes — California
M. J. Ryan — Illinois
M. H. Sansone — New York
T. S. Scholl — British Columbia,
Canada
G. L. Schultz — Nevada
T. S. Seine — North Dakota
C. S. Selinger — Saskatchewan,
Canada
D. Slater — Manitoba, Canada
N. Smith — Pennsylvania
R. Spiker — North Carolina
R. K. Sturm — Utah
S. R. Townsend — Prince Edward
Island, Canada
R. D. Troutt — Texas
M. J. Verhagen — Wisconsin
M. Washington — New Jersey
K. L. Watson — Mississippi
C. J. Wilson III — Kansas

ADMINISTRATIVE COMMITTEE
T. P. Pastor, Chair
R. W. Barnes, Vice Chair
J. S. Brzuszkiewicz, Staff Secretary

R. J. Basile
J. E. Batey
T. L. Bedeaux
D. L. Berger

J. F. Henry

INTERNATIONAL INTEREST REVIEW GROUP

R. S. Hill III
V. Felix
Y.-G. Kim
S. H. Leong
W. Lin
O. F. Manafa

G. C. Park
M. D. Rana
B. F. Shelley
W. J. Sperko

xxii

C. Minu
T. S. G. Narayannen
Y.-W. Park
R. Reynaga
P. Williamson

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D. A. Douin — Ohio, Secretary
M. J. Adams — Ontario, Canada
J. T. Amato — Minnesota
B. P. Anthony — Rhode Island
R. D. Austin — Arizona
R. J. Brockman — Missouri
M. A. Burns — Florida
J. H. Burpee — Maine
C. B. Cantrell — Nebraska
D. C. Cook — California
B. J. Crawford — Georgia
E. L. Creaser — New Brunswick,
Canada
J. J. Dacanay — Hawaii
C. Dautrich — North Dakota
P. L. Dodge — Nova Scotia, Canada
D. Eastman — Newfoundland and
Labrador, Canada
J. J. Esch — Delaware
C. Fulton — Alaska
R. J. Handy — Kentucky
D. R. Hannon — Arkansas
E. S. Kawa — Massachusetts
J. C. Klug — Wisconsin
M. Kotb — Quebec, Canada
T. C. Hellman — Oklahoma
E. G. Hilton — Virginia
D. T. Jagger — Ohio
K. J. Kraft — Maryland

L. C. Leet — Washington
A. M. Lorimor — South Dakota
M. Mailman — Northwest
Territories, Canada

HONORARY MEMBERS (MAIN COMMITTEE)
F. P. Barton
R. J. Cepluch
T. M. Cullen
W. D. Doty
G. E. Feigel
O. F. Hedden
M. H. Jawad

N. Prokopuk
J. D. Reynolds

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Subgroup on Locomotive Boilers (BPV I)

L. Moedinger
P. A. Molvie
Y. Oishi
E. M. Ortman

J. T. Pillow
B. W. Roberts
J. M. Tanzosh
D. Tompkins
D. E. Tuttle
J. Vattappilly
R. V. Wielgoszinski
Y. Li, Delegate
H. Michael, Delegate
D. N. French, Honorary Member
T. C. McGough, Honorary Member
R. L. Williams, Honorary Member

L. Moedinger, Chair
S. M. Butler, Secretary
P. Boschan
J. Braun
R. C. Franzen, Jr.
D. W. Griner
S. D. Jackson
M. A. Janssen

Subgroup on Materials (BPV I)
G. W. Galanes, Chair
K. K. Coleman, Vice Chair
J. S. Hunter, Secretary
S. H. Bowes
D. A. Canonico
P. Fallouey
K. L. Hayes

J. F. Henry

Subgroup on Design (BPV I)
J. Vattappilly, Chair
D. I. Anderson, Secretary
D. Dewees
P. Dhorajia
H. A. Fonzi, Jr.
J. P. Glaspie
G. B. Komora

S. A. Lee
G. M. Ray
J. E. Rimmasch
R. B. Stone
M. W. Westland
R. Yuill
R. D. Reetz, Contributing Member

P. A. Molvie
D. A. Olson
S. V. Torkildson

M. Lewis
O. X. Li
F. Masuyama
D. W. Rahoi
B. W. Roberts
J. M. Tanzosh
J. Vattappilly

M. Wadkinson
C. F. Jeerings, Contributing Member
J. C. Light, Contributing Member

Subgroup on Solar Boilers (BPV I)
Subgroup on Fabrication and Examination (BPV I)
J. Hainsworth
T. E. Hansen
C. T. McDaris
R. E. McLaughlin
R. J. Newell
Y. Oishi
R. V. Wielgoszinski

D. J. Koza
F. Massi
E. M. Ortman
M. J. Slater
J. C. Light, Contributing Member

India International Working Group (BPV I)
H. Dalal
I. Kalyanasundaram
S. Mathur
A. J. Patil
A. R. Patil
G. V. S. Rao

Subgroup on General Requirements and Piping (BPV I)

T. E. Hansen, Chair
E. M. Ortman, Vice Chair
F. Massi, Secretary
P. Becker
D. L. Berger
P. D. Edwards
G. W. Galanes
W. L. Lowry
R. E. McLaughlin

B. Mollitor
J. T. Pillow
D. Tompkins
S. V. Torkildson
D. E. Tuttle
M. Wadkinson
R. V. Wielgoszinski
C. F. Jeerings, Contributing Member
R. Uebel, Contributing Member

U. Revisanakaran
N. Satheesan
G. U. Shanker
D. Shrivastava
S. Venkataramana

Task Group on Modernization of BPVC Section I
D. I. Anderson, Chair
U. D’Urso, Staff Secretary
J. L. Arnold

S. W. Cameron
D. Dewees
G. W. Galanes
J. P. Glaspie
T. E. Hansen

Subgroup on Heat Recovery Steam Generators (BPV I)
S. V. Torkildson, Chair
J. L. Arnold
J. P. Bell
B. G. Carson
J. Gertz
T. E. Hansen

G. B. Komora
C. T. McDaris
Y. Oishi
E. M. Ortman
D. Tompkins
B. C. Turczynski

xxiii

J. F. Henry
R. E. McLaughlin
P. A. Molvie
E. M. Ortman
J. T. Pillow
B. W. Roberts
D. E. Tuttle

J. Vattappilly

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

J. T. Pillow, Chair
J. L. Arnold, Secretary
P. Becker
D. L. Berger
S. W. Cameron
S. Fincher
G. W. Galanes
P. F. Gilston

J. S. Hunter, Chair
S. V. Torkildson, Secretary
G. W. Galanes
R. E. Hearne
P. Jennings

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

COMMITTEE ON POWER BOILERS (BPV I)
D. L. Berger, Chair
R. E. McLaughlin, Vice Chair
U. D'Urso, Staff Secretary
J. L. Arnold
S. W. Cameron
D. A. Canonico
K. K. Coleman
P. D. Edwards

P. Fallouey
J. G. Feldstein
G. W. Galanes
T. E. Hansen
J. F. Henry
J. S. Hunter
W. L. Lowry
F. Massi

No fu


Subgroup on International Material Specifications (BPV II)

E. Shapiro
M. J. Slater
R. C. Sutherlin
R. W. Swindeman
J. M. Tanzosh
D. Tyler
O. Oldani, Delegate
H. D. Bushfield, Contributing
Member
M. L. Nayyar, Contributing Member
E. G. Nisbett, Contributing Member
E. Upitis, Contributing Member
T. M. Cullen, Honorary Member
W. D. Doty, Honorary Member
W. D. Edsall, Honorary Member
G. C. Hsu, Honorary Member

R. A. Moen, Honorary Member
C. E. Spaeder, Jr., Honorary
Member
A. W. Zeuthen, Honorary Member

A. Chaudouet, Chair
O. X. Li, Vice Chair
T. F. Miskell, Secretary
S. W. Cameron
D. A. Canonico
H. Chen
P. Fallouey
A. F. Garbolevsky
D. O. Henry

M. Ishikawa
W. M. Lundy
A. R. Nywening
E. Upitis
F. Zeller
D. Kwon, Delegate
O. Oldani, Delegate
H. Lorenz, Contributing Member

Subgroup on Nonferrous Alloys (BPV II)
R. C. Sutherlin, Chair
M. H. Gilkey, Vice Chair
H. Anada
J. Calland
D. B. Denis

J. F. Grubb
A. Heino
M. Katcher
J. A. McMaster
L. Paul

D. W. Rahoi
W. Ren
E. Shapiro
M. H. Skillingberg
D. Tyler
J. Weritz
R. Wright
R. Zawierucha
W. R. Apblett, Jr., Contributing
Member

Subgroup on Physical Properties (BPV II)
Executive Committee (BPV II)
J. F. Henry, Chair
D. W. Rahoi, Vice Chair
N. Lobo, Staff Secretary
A. Appleton
A. Chaudouet
J. R. Foulds
M. Gold

J. F. Grubb, Chair
H. D. Bushfield
D. B. Denis

J. F. Grubb
R. W. Mikitka
B. W. Roberts
R. C. Sutherlin

Subgroup on Strength, Ferrous Alloys (BPV II)

R. W. Swindeman
J. M. Tanosh

J. R. Harris III
M. H. Jawad
C. R. Thomas
M. Wadkinson
M. Katcher, Contributing Member
C. H. Sturgeon, Contributing
Member

Subgroup on Strength of Weldments (BPV II & BPV IX)
W. F. Newell, Jr., Chair
S. H. Bowes
K. K. Coleman
P. D. Flenner
J. R. Foulds
D. W. Gandy
M. Gold
K. L. Hayes

Subgroup on Ferrous Specifications (BPV II)

A. Appleton, Chair
K. M. Hottle, Vice Chair
P. Wittenbach, Secretary
H. Chen
B. M. Dingman
M. J. Dosdourian
P. Fallouey
J. D. Fritz
T. Graham
J. M. Grocki
J. F. Grubb
C. Hyde

S. W. Knowles
F. Masuyama
C. Pearce
D. W. Rahoi
B. W. Roberts
M. S. Shelton
J. P. Shingledecker
R. W. Swindeman
W. R. Apblett, Jr., Contributing
Member
H. Murakami, Contributing
Member

D. S. Janikowski
L. J. Lavezzi
S. G. Lee
W. C. Mack

A. S. Melilli
K. E. Orie
J. Shick
E. Upitis
J. D. Wilson
R. Zawierucha
E. G. Nisbett, Contributing Member

J. F. Henry
J. Penso
D. W. Rahoi
B. W. Roberts
J. P. Shingledecker
W. J. Sperko
J. P. Swezy, Jr.
J. M. Tanzosh

Working Group on Materials Database (BPV II)
R. W. Swindeman, Chair
N. Lobo, Staff Secretary
F. Abe
J. R. Foulds
J. F. Henry
M. Katcher
B. W. Roberts

xxiv

R. C. Sutherlin
D. Andrei, Contributing Member

J. L. Arnold, Contributing Member
W. Hoffelner, Contributing Member
T. Lazar, Contributing Member
D. T. Peters, Contributing Member
W. Ren, Contributing Member

This copy downloaded on 2015-07-31 23:27:17 -0500 by authorized user logan ahlstrom.

J. M. Tanzosh, Chair
M. J. Slater, Secretary
F. Abe
H. Anada
D. A. Canonico
A. Di Rienzo
P. Fallouey
J. R. Foulds
M. Gold
J. A. Hall
J. F. Henry
K. Kimura

Subgroup on External Pressure (BPV II)
R. W. Mikitka, Chair
D. L. Kurle, Vice Chair
J. A. A. Morrow, Secretary
L. F. Campbell
H. Chen
D. S. Griffin
J. F. Grubb

P. Fallouey
E. Shapiro

Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).

COMMITTEE ON MATERIALS (BPV II)
J. F. Henry, Chair
D. W. Rahoi, Vice Chair
N. Lobo, Staff Secretary
F. Abe
A. Appleton
J. Cameron
D. A. Canonico
A. Chaudouet
P. Fallouey
J. R. Foulds
D. W. Gandy
M. H. Gilkey
M. Gold
J. F. Grubb
J. A. Hall
K. M. Hottle
M. Katcher
O. X. Li
F. Masuyama
R. K. Nanstad
B. W. Roberts

No fu