Bsi bs en 00729 1 1995 (1998)

BS EN
729-1:1995

BRITISH STANDARD
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Incorporating
Amendment No. 1

Quality requirements
for welding
Fusion welding of
metallic materials —
Part 1: Guidelines for selection and use

The European Standard EN 729-1:1994 has the status of a
British Standard

UDC 621.792:658.562

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BS EN 729-1:1995

Cooperating organizations

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This British Standard, having
been prepared under the
direction of the Engineering
Sector Board, was published
under the authority of the
Standards Board and comes
into effect on
15 January 1995
© BSI 12-1998

The European Committee for Standardization (CEN), under whose supervision
this European Standard was prepared, comprises the national standards
organizations of the following countries:
Austria

Oesterreichisches Normungsinstitut

Belgium

Institut belge de normalisation

Denmark

Dansk Standard

Finland

Suomen Standardisoimisliito, r.y.

France

Association franỗaise de normalisation

Germany

Deutsches Institut für Normung e.V.

Greece

Hellenic Organization for Standardization

Iceland

Technological Institute of Iceland

Ireland

National Standards Authority of Ireland

Italy

Ente Nazionale Italiano di Unificazione

Luxembourg

Inspection du Travail et des Mines

Netherlands

Nederlands Normalisatie-instituut

Norway

Norges Standardiseringsforbund

Portugal

Instituto Portugs da Qualidade

Spain

Asociación Espola de Normalización y Certificación

Sweden

Standardiseringskommissionen i Sverige

Switzerland

Association suisse de normalisation

United Kingdom

British Standards Institution

Amendments issued since publication
Amd. No.

Date

Comments

8849

December 1995 Indicated by a sideline in the margin

The following BSI references
relate to the work on this
standard:
Committee reference WEE/-/1/6
Draft for comment 92/75856 DC
ISBN 0 580 23131 3
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BS EN 729-1:1995

Contents
Cooperating organizations
National foreword

Page
Inside front cover

ii

Foreword
Text of EN 729-1
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

2
3
Inside back cover
Inside back cover

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i


BS EN 729-1:1995

National foreword
This British Standard has been prepared under the direction of the Engineering

Sector Board and is the English language version of EN 729-1:1994 Quality
requirements for welding — Fusion welding of metallic materials —
Part 1: Guidelines for selection and use, published by the European Committee
for Standardization (CEN).
EN 729-1 was produced as the result of international discussion in which the
UK took and active part.
There has previously been no direct British Standard equivalent to this standard.
Application Standards may request the manufacturer to comply with one of the
Parts of EN 729.
It is assumed that the execution of the provisions of this document is entrusted to
suitably qualified and experienced persons.
A British Standard does not purport to include all the necessary provisions of a
contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

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Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii,
the EN title page, pages 2 to 6, an inside back cover and a back cover.
This standard has been updated (see copyright date) and may have had
amendments incorporated. This will be indicated in the amendment table on
the inside front cover.
ii

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EUROPEAN STANDARD

EN 729-1

NORME EUROPÉENNE
EUROPÄISCHE NORM

September 1994

UDC 621.792:658.562
Descriptors: Welding, welded constructions, quality, quality assurance, selection, utilization; manufacturing, user supplier relations

English version

Quality requirements for welding —
Fusion welding of metallic materials —
Part 1: Guidelines for selection and use

Exigences de qualité en soudage — Soudage
par fusion des matériaux métalliques —
Partie 1: Lignes directrices pour la sélection et
l’utilisation

Schweißtechnische Qualitiätsanforderungen —

Schmelzschweißen metallischer Werkstoffe —
Teil 1: Richtlinien zur Auswahl und
Verwendung

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This European Standard was approved by CEN on 1994-09-06. 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,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom.

CEN
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
© 1994 Copyright reserved to CEN members

Ref. No. EN 729-1:1994 E

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Foreword

Contents

This European Standard was prepared by the
Technical Committee CEN/TC 121, Welding, of
which the secretariat is held by DS.
CEN/TC 121 has decided to submit the final draft
for formal vote by its resolution 173/1993. The result
was positive.
EN 729 is composed of the four following parts:
— EN 729-1, Quality requirements for welding —
Fusion welding of metallic materials —
Part 1: Guidelines for selection and use;
— EN 729-2, Quality requirements for welding —
Fusion welding of metallic materials —
Part 2: Comprehensive quality requirements;
— EN 729-3, Quality requirements for welding —
Fusion welding of metallic materials —

Part 3: Standard quality requirements;
— EN 729-4, Quality requirements for welding —
Fusion welding of metallic materials —
Part 4: Elementary quality requirements.
This European Standard has been prepared under a
mandate given to CEN by the Commission of the
European Communities and the European Free
Trade Association, and supports essential
requirements of EC Directive(s).
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 1995, and conflicting national standards
shall be withdrawn at the latest by March 1995.
According to the CEN/CENELEC Internal
Regulations, the following countries are bound to
implement this European Standard: Austria,
Belgium, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and United Kingdom.

Page
Foreword
2
0
Introduction
3
1
Scope

3
2
Normative references
3
3
Definitions
4
4
Selection of welding quality requirements 4
Annex A (informative) Flow diagram for
selection of welding requirements
5
Annex B (informative) Summary comparison
of welding quality requirements with regard
to EN 729-2, EN 729-3 and EN 729-4
6
Table 1 — Selection of welding quality
requirements
4
Table B.1 — Summary comparison
6

2

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EN 729-1:1994

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EN 729-1:1994

Welding processes are widely used to fabricate
many of the constructions of the engineering
industry and in some companies they are the key
feature of production. Such constructions may range
from pressure vessels to domestic and agricultural
equipment and includes items such as cranes,
bridges and other welded structures. As such,
welding exerts a profound influence on the cost of
fabrication and quality of the product. It is
important, therefore, to ensure that welding is
carried out in the most effective way and that
appropriate control is exercised over all aspects of
the operation.
Within the EN 29000 series of standards for quality
systems, welding is to be treated as a
“Special Process” since welds cannot be fully
verified by subsequent inspection and testing of the
product to ensure that the required quality

standards have been met.
Quality cannot be inspected into a product, it has to
be built into it. Even the most extensive and
sophisticated non-destructive testing does not
improve the quality of welds.
For welded constructions to be effective and free
from serious problems in production and in service,
it is necessary to provide controls, from the design
phase, through material selection, into fabrication
and subsequent inspection. For example, poor
design for welding may create serious and costly
difficulties in the workshop, on site, or in service.
Incorrect material selection may result in welding
problems, such as cracking. Welding procedures
have to be correctly formulated and approved to
avoid imperfections. Supervision needs to be
implemented to ensure that the specified quality
will be achieved.
To ensure effective welded fabrication, management
needs to apreciate the sources of potential trouble
and to introduce appropriate quality procedures.

The guidelines define various approaches to quality
requirements for welding fabrication, both in
workshops and on sites and provide guidance for
describing the capability of a manufacturer to be
able to produce welded constructions of the specified
quality. They can also be used by any interested
party as a basis for assessing a manufacturer’s
welding quality arrangements.

The guidelines are intended as a guide for the
preparation of regulatory or contractual
requirements and for a manufacturer’s
management to define welding requirements for
quality systems related to the type of welded
construction. The guidelines are not structured to be
used in isolation as part of any regulatory,
contractual or managerial requirement.
These guidelines are intended to be used for the
following purposes:
a) providing interpretation of the requirements in
the EN 29000 series of standards, as a guideline
for specification and establishment of the part of
the quality system related to control of welding as
a “Special Process”;
b) providing guidelines to establish specifications
and welding quality requirements, where a
quality system according to EN 29001 and
EN 29002 is not involved;
c) assessment of the welding quality
requirements mentioned in a) or b) above.
The application of this standard would typically
occur in the following circumstances:
— in contractual situations: specification of
welding requirements for quality systems;
— by manufacturers: establishment and
maintenance of welding quality requirements;
— by committees preparing structural codes or
other application standards: specification of
welding quality requirements;

— by interested parties, e.g. third parties,
customers or the manufacturer’s management:
assessment of welding quality requirements.
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0 Introduction

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1 Scope
These guidelines have been prepared to describe
welding quality requirements suitable for
application by manufacturers using welding as a
means of fabrication. They are structured such that
they can be used for fabrication of virtually any type
of fusion welded construction. These guidelines
relate only to those aspects of the quality of the final
construction which may be influenced by welding
and allied processes.

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2 Normative references
This European Standard incorporates by dated or
undated reference, provisions from other
publications. These normative references are cited
at the appropriate places in the text and the

publications are listed hereafter. For dated
references, subsequent amendments to or revisions
of any of these publications apply to this European
Standard only when incorporated in it by
amendment or revision. For undated references the
latest edition of the publication referred to applies.

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EN 729-1:1994

EN 729-2, Quality requirements for welding —
Fusion welding of metallic materials —
Part 2: Comprehensive quality requirements.
EN 729-3, Quality requirements for welding —
Fusion welding of metallic materials —
Part 3: Standard quality requirements.
EN 729-4, Quality requirements for welding —
Fusion welding of metallic materials —
Part 4: Elementary quality requirements.
EN 29000, Quality management and quality
assurance standards — Guidelines for selection and
use.
EN 29001, Quality systems — Model for quality
assurance in design development, production,

installation and servicing.
EN 29002, Quality systems — Model for quality
assurance in production and installation.
ISO 8402:1986, Quality — Vocabulary.

3 Definitions
For the purpose of this standard the following
definitions apply.
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3.1
contract
a contract is:
— either the agreed requirements for
constructions ordered by a customer;
— or the manufacturer’s basic specification for
constructions manufactured in series for several
of customers, unknown to the manufacturer at
the time of design and production.
the contract is, in both cases, assumed to include
reference to all relevant regulatory requirements
NOTE The role of an independent body is considered to be a
matter which is determined by the contracting parties and/or the
application standard.

3.2
special process
these are processes, the results of which cannot be
fully verified by subsequent inspection and testing
of the product and where, for example, processing

deficiencies may become apparent only after the
product is in use. Accordingly, continous monitoring
and/or compliance with documented procedures is
required to ensure that the specified requirements
are met (according to 4.9.2 of EN 29001:1987
and 4.8.2 of EN 29002:1987)

3.4
qualified person
a person whose competence and knowledge has been
obtained by education, by training and/or relevant
practical experience
3.5
construction
the term “construction” is used for product,
structure or any other welded item
3.6
quality system
according to ISO 8402

4 Selection of welding quality
requirements
By using this standard it is possible to select the
welding quality requirements, to suit the type of
welded construction concerned, in accordance with
the appropriate parts of EN 729:
— Part 2: Comprehensive quality requirements;
— Part 3: Standard quality requirements;
— Part 4: Elementary quality requirements.
Guidance in the selection is shown in Table 1.

Annex A and Annex B give further information on
the selection and content of EN 729-2, EN 729-3 and
EN 729-4.
Table 1 — Selection of welding quality
requirements

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Contract welding
requirements

Quality requirements
When quality
When quality
systemsa to
system to
EN 29001 or
EN 29001 or
EN 29002 is not EN 29002 is not
required use
required use

comprehensive
quality
requirements

EN 729-2a

EN 729-2

standard quality

requirements

EN 729-2a

EN 729-3

elementary quality
requirements

EN 729-2a

EN 729-4

a

Within the scope of EN 29001 and EN 29002 the
requirements of EN 729-2 may be minimized to an appropriate
level to suit the type of welded construction.

3.3
manufacturing organization
manufacturing organization means welding
workshops and/or sites under the same technical
and quality management

4

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EN 729-1:1994

Annex A (informative)
Flow diagram for selection of welding quality requirements

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EN 729-1:1994

Annex B (informative)

Summary comparison of welding quality requirements with regard to
EN 729-2, EN 729-3 and EN 729-4
Table B.1 — Summary comparison
Parts of EN 729

EN 729-2 (comprehensive
quality requirements)

EN 729-3 (standard quality
requirements)

EN 729-4 (elementary
quality requirements)

Elements

Contract review
Design review

Full documented review
Less extensive review
Design for welding to be confirmed

Sub-contractor

Treat like a main fabricator

Welder, operators
Welding coordination

Approved to EN 287 or EN 1418
Welding coordination personnel with appropriate
technical knowledge according to EN 719, or persons
with similar knowledge
Sufficient and competent personnel to be available

Establish that capability
and information is
available
Shall comply to
standard

Not required but
personal responsibility
of manufacturer
Inspection personnel
Sufficient and
competent, access for
third parties, as needed
Production equipment Required to prepare, cut, weld, transport, lift, together No specific requirement
with safety equipment and protective cloths
Equipment
Has to be carried out,
No specific requirements No specific requirement
maintenance
maintenance plan
shall be adequate
necessary
Production plan
Necessary

Restricted plan necessary No requirement
Welding procedure
Instructions to be available to welder, see appropriate No requirement
specification (WPS)
part of EN 288
Welding procedure
To appropriate part of EN 288, approved as application No specific requirement
approval
standard to contract demands
Work instructions
Welding procedure specification (WPS) or dedicated
No requirement
work instructions to be available
Documentation
Necessary
Not specified
No requirement
Batch testing of
Only if specified in
Not specified
No requirement
consumables
contract
Storage and handling of As per supplier recommended as minimum
welding consumables
Storage of parent
Protection required from influence by the environment; No requirement
materials
identification shall be maintained
Post-weld heat

Specification and complete Confirmation to
No requirement
treatment
record necessary
specification necessary
Inspection before,
As required for specified operations
Responsibilities as
during, after welding
specified in contract
Non-conformances
Procedures shall be available
Calibration
Procedures shall be
Not specified
available
Identification
Required, when
Required, when necessary Not specified
appropriate
Traceability
Not specified
Quality records
Shall be available to meet the rules for product liability As required by contract
Retained for five years minimum

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BS EN 729-1:1995
National annex NA (informative)
Committees responsible

Associated Offices Technical Committee
British Constructional Steelwork Association Ltd.
British Railways Board
Electricity Association
Institute of Quality Assurance
Power Generation Contractors’ Association (BEAMA Ltd.)
Railway Industry Association of Great Britian
Welding Manufacturers’ Association Ltd.

National annex NB (informative)
Cross-references
Publication referred to

EN 729-2:1994

EN 729-3:1994
EN 729-4:1994

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The United Kingdom participation in the preparation of this European Standard was entrusted by the
Engineering Sector Board to Technical Committee WEE/-/1/6, upon which the following bodies were
represented:

Corresponding British Standard

BS EN 729 Quality requirements for welding
Part 2:1995 Comprehensive quality requirements
Part 3:1995 Standard quality requirements
Part 4:1995 Elementary quality requirements
BS 5750 Quality systems
Part 0: Principal concepts and applications

EN 29000:19871)

Section 0.1:1987 Guide to selection and use

EN 29001:19871)

Part 1:1987 Specification for design/development, production, installation and
servicing

EN 29002:19871)

Part 2:1987 Specification for production and installation

1)

EN 29000:1987, EN 29001:1987 and EN 29002:1987 have been superseded by EN ISO 9000:1994, EN ISO 9001:1994 and
EN ISO 9002:1994 respectively which have been implemented as BS EN ISO 9000:1994, BS EN ISO 9001:1994 and
BS EN ISO 9002:1994 respectively.
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