Bsi bs en 01515 3 2005 (2006)

Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

BRITISH STANDARD

BS EN
1515-3:2005
Incorporating
Corrigendum No. 1

Flanges and their
joints — Bolting —
Part 3: Classification of bolt materials
for steel flanges, class designated

The European Standard EN 1515-3:2005 has the status of a
British Standard

ICS 21.060.10; 23.040.60

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

BS EN 1515-3:2005

National foreword
This British Standard is the official English language version of
EN 1515-3:2005.
The UK participation in its preparation was entrusted to Technical Committee
PSE/15, Flanges, which has the responsibility to:

—

aid enquirers to understand the text;

—

present to the responsible international/European committee any
enquiries on the interpretation, or proposals for change, and keep
UK interests informed;

—

monitor related international and European developments and
promulgate them in the UK.

A list of organizations represented on this committee can be obtained on
request to its secretary.
Cross-references
The British Standards which implement international or European
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or
by using the “Search” facility of the BSI Electronic Catalogue or of British
Standards Online.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

Summary of pages
This document comprises a front cover, an inside front cover, the EN title page,

pages 2 to 7 and a back cover.
The BSI copyright date displayed in this document indicates when the
document was last issued.
This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 14 November 2005

© BSI 2006

ISBN 0 580 46786 4

Amendments issued since publication
Amd. No.

Date

Comments

16535

31 August 2006 Deletion of supersession details


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EUROPEAN STANDARD

EN 1515-3

NORME EUROPÉENNE
EUROPÄISCHE NORM

September 2005

ICS 21.060.10; 23.040.60

English Version

Flanges and their joints - Bolting - Part 3: Classification of bolt
materials for steel flanges, class designated
Brides et leur assemblages - Boulonnerie - Partie 3:
Classification de matériaux de boulonnerie pour brides en
acier, désignées Class

Flansche und ihre Verbindungen - Schrauben und Muttern Teil 3: Klassifizierung von Schraubenwerkstoffen für
Stahlflansches, nach Class bezeichnet

This European Standard was approved by CEN on 8 August 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2005 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels

Ref. No. EN 1515-3:2005: E


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 1515-3:2005 (E)

Contents

Page

Foreword ..........................................................................................................................................................3
1

Scope ...................................................................................................................................................4

2

Normative references .........................................................................................................................4

3

Classification of bolt materials ..........................................................................................................4

Annex A (informative) Basic information......................................................................................................6
Bibliography.....................................................................................................................................................7

2


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 1515-3:2005 (E)

Foreword
This European Standard (EN 1515-3:2005) has been prepared by Technical Committee CEN/TC 74 “Flanges
and their joints”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by March 2006, and conflicting national standards shall be withdrawn at
the latest by March 2006.
EN 1515 "Flanges and their joints – Bolting" consists of three Parts:
 Part 1: Selection of bolting;
 Part 2: Classification of bolt materials for steel flanges, PN designated;
 Part 3: Classification of bolt materials for steel flanges, Class designated.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and
United Kingdom.

3


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 1515-3:2005 (E)

1

Scope

This European Standard covers the classification of bolt materials used in combination with steel flanges according to EN 1759-1 (Class designated).
Bolt materials are listed in EN 1515-1; flange material groups are listed in EN 1759-1.

2

Normative references

The following referenced documents are indispensable for the application of this European Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 1759-1:2004, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, Class
designated — Part 1: Steel flanges NPS 1/2 to 24.
EN 1515-1, Flanges and their joints — Bolting — Part 1: Selection of bolting.
EN 10269, Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties.
EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts,
screws and studs (ISO 898-1:1999).
EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners — Part 1: Bolts, screws
and studs (ISO 3506-1:1997).

3

Classification of bolt materials

The classification of bolt materials as given in Table 1 is based on the rules given in ASME B16.5 (see also
annex A).
All bolting materials are subject to the following limitations:
a)

High strength bolting (allowable stress 170 N/mm2 and above; see Table A.1) may be used in any
flanged joint. During assembly however, care should be taken not to over-stress the flanges (e. g. by
means of torque control).

b)

Intermediate strength bolting may be used in any flanged joint, provided the ability according to EN
1759-1:2004, 5.3.1 is verified.

c)

Low strength bolting (allowable stress 140 N/mm2 and below; see Table A.1) is restricted to CL 150 and
CL 300. The ability according to EN 1759-1:2004, 5.3.1 shall be verified, with special consideration of the
gasket.

4


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 1515-3:2005 (E)

Table 1 — Classification of bolting
Bolting according to EN 1515-1
Line
01
02
04
05, 07
06, 08
09
10
11
12
13
14
15
16, 18
17, 19
20
21
22
23

Material / strength class
4.6
5.6
8.8
25CrMo4
42CrMo4

30CrNiMo8
42CrMo5-6
40CrMoV4-6
21CrMoV5-7
20CrMoVTiB4-10
X6NiCrTiMoVB 25-15-2
X7CrNiMoBNb16-16
A4-50,A2-50
A4-70, A2-70
X5CrNiMo17-12-2 AT
X5CrNiMo17-12-2 AT+C
X5CrNi18-10
X5CrNi18-10 AT+C

Standard
EN ISO 898-1
EN ISO 898-1
EN ISO 898-1
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN ISO 3506-1
EN ISO 3506-1
EN 10269

EN 10269
EN 10269
EN 10269

Diameter
mm
all
all
all
all
all
all
all
all
all
all
all
all
≤ 39
≤ 24
all
all
all
all

Classification
Low strength
Intermediate strength
High strength
High strength

High strength
High strength
High strength
High strength
High strength
High strength
Intermediate strength
High strength
Low strength
High strength
Low strength
Intermediate strength
Low strength
Intermediate strength

5


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 1515-3:2005 (E)

Annex A
(informative)
Basic information
The classification has been developed with the following rules:
a) Classification according to ASME B16.5:1996, 5.3 and table 1B.
b) Allowable stresses for EN-materials are min of 1/3 Rm and 2/3 Reh at room temperature.
c) High strength is classified with an allowable stress of 170 N/mm2 and higher, low strength with 140 N/mm2
and lower. If an EN-material has an equivalent ASTM material according to EN 1515-1, the classification

according to B16.5 shall govern (see line 14, 21 and 23).
Table A.1 — Development of bolting classification

EN 1515-1

Material / strength class
EN

Rm

Allowable
stress

Reh
2

N/mm

2

Material /
strength class
ASTM

2

N/mm

N/mm

Allowable
stress
ksi

Classification
2

N/mm

01

4.6

400

240

133

A307 Gr.B

7

48

low

02

5.6

500

300

167

—

—

-

intermediate

04

8.8

800

640

267

A354 Gr.BC

25

172

high

05, 07

25CrMo4

600

440

200

—

—

-

high

06, 08

42CrMo4

860

730

287

B7

25

172

high

09

30CrNiMo8

1 040

940

347

L43

25

172

high

10

42CrMo5-6

860

700

287

—

—

-

high

11

40CrMoV4-6

850

700

283

B16

25

172

high

12

21CrMoV5-7

700

550

233

—

—

-

high

13

20CrMoVTiB4-10

820

660

273

—

—

-

high

14

X6NiCrTiMoVB 25-15-2

900

600

300

A453 Gr.660

21

147

intermediate

15

X7CrNiMoBNb16-16

650

500

217

—

—

-

high

16, 18

A4-50,A2-50

500

210

140

—

—

-

low

17, 19

A4-70, A2-70

700

450

233

—

—

-

high

20

X5CrNiMo17-12-2

500

200

133

B8M

19

130

low

21

X5CrNiMo17-12-2 AT+C

700

350

233

B8M Cl.2

20

138

intermediate

22

X5CrNi18-10

500

190

127

B8

19

130

low

23

X5CrNi18-10 AT+C

700

350

233

B8 CL.2

20

138

intermediate

6


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 1515-3:2005 (E)

Bibliography

[1]
ASME B16.5:1996, (with addenda 1998), Pipe flanges and flanged fittings.

7


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Apr 02 10:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

BS EN
1515-3:2005

BSI — British Standards Institution
BSI is the independent national body responsible for preparing
British Standards. It presents the UK view on standards in Europe and at the
international level. It is incorporated by Royal Charter.
Revisions
British Standards are updated by amendment or revision. Users of
British Standards should make sure that they possess the latest amendments or

editions.
It is the constant aim of BSI to improve the quality of our products and services.
We would be grateful if anyone finding an inaccuracy or ambiguity while using
this British Standard would inform the Secretary of the technical committee
responsible, the identity of which can be found on the inside front cover.
Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.
BSI offers members an individual updating service called PLUS which ensures
that subscribers automatically receive the latest editions of standards.
Buying standards
Orders for all BSI, international and foreign standards publications should be
addressed to Customer Services. Tel: +44 (0)20 8996 9001.
Fax: +44 (0)20 8996 7001. Email: Standards are also
available from the BSI website at .
In response to orders for international standards, it is BSI policy to supply the
BSI implementation of those that have been published as British Standards,
unless otherwise requested.
Information on standards
BSI provides a wide range of information on national, European and
international standards through its Library and its Technical Help to Exporters
Service. Various BSI electronic information services are also available which give
details on all its products and services. Contact the Information Centre.
Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email:
Subscribing members of BSI are kept up to date with standards developments
and receive substantial discounts on the purchase price of standards. For details
of these and other benefits contact Membership Administration.
Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001.
Email:
Information regarding online access to British Standards via British Standards
Online can be found at />Further information about BSI is available on the BSI website at
.

Copyright
Copyright subsists in all BSI publications. BSI also holds the copyright, in the
UK, of the publications of the international standardization bodies. Except as
permitted under the Copyright, Designs and Patents Act 1988 no extract may be
reproduced, stored in a retrieval system or transmitted in any form or by any
means – electronic, photocopying, recording or otherwise – without prior written
permission from BSI.

BSI
389 Chiswick High Road
London
W4 4AL

This does not preclude the free use, in the course of implementing the standard,
of necessary details such as symbols, and size, type or grade designations. If these
details are to be used for any other purpose than implementation then the prior
written permission of BSI must be obtained.
Details and advice can be obtained from the Copyright & Licensing Manager.
Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553.
Email: