Bsi bs en 00729 1 1995 (1998)

www bzfxw com BRITISH STANDARD BS EN 729 1 1995 Incorporating Amendment No 1 Quality requirements for welding Fusion welding of metallic materials — Part 1 Guidelines for selection and use The Europea[.]

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BRITISH STANDARD BS EN

729-1:1995

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

Copyright British Standards Institution

Reproduced by IHS under license with BSI - Uncontrolled Copy

Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:30:03 MST Questions or comments about this message: please call the Document

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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

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

Cooperating organizations

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

Finland Suomen Standardisoimisliito, r.y

France Association française 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 Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige

Switzerland Association suisse de normalisation United Kingdom British Standards Institution

Amendments issued since publication

8849 December 1995 Indicated by a sideline in the margin

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`,,,,``,`,,,,`,,,`,,`,`,``,,-`-`,,`,,`,`,,` -BS EN 729-1:1995

Contents

Page

National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back cover

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`,,,,``,`,,,,`,,,`,,`,`,``,,-`-`,,`,,`,`,,` -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.

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

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EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 729-1

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

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

Ref No EN 729-1:1994 E

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Foreword

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;

Part 2: Comprehensive quality requirements;

Part 3: Standard quality requirements;

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

Contents

Page

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

Table B.1 — Summary comparison 6

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EN 729-1:1994

0 Introduction

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

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

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

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 729-2, Quality requirements for welding —

Part 2: Comprehensive quality requirements.

Part 3: Standard quality requirements.

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

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)

3.3

manufacturing organization

manufacturing organization means welding

workshops and/or sites under the same technical

and quality management

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 Contract welding

requirements Quality requirements

When quality systemsa to

EN 29001 or

EN 29002 is not required use

When quality system to

EN 29001 or

EN 29002 is not required use

comprehensive quality

requirements

EN 729-2a EN 729-2

standard quality requirements EN 729-2

a EN 729-3

elementary quality requirements EN 729-2

a 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.

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EN 729-1:1994

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

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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) quality requirements) EN 729-4 (elementary Elements

Contract review Full documented review Less extensive review Establish that capability

and information is available

Design review Design for welding to be confirmed

standard Welder, operators Approved to EN 287 or EN 1418

Welding coordination Welding coordination personnel with appropriate

technical knowledge according to EN 719, or persons with similar knowledge

Not required but personal responsibility

of manufacturer Inspection personnel Sufficient and competent personnel to be available Sufficient and

competent, access for third parties, as needed Production equipment Required to prepare, cut, weld, transport, lift, together

with safety equipment and protective cloths No specific requirement Equipment

maintenance Has to be carried out, maintenance plan

necessary

No specific requirements shall be adequate No specific requirement Production plan Necessary Restricted plan necessary No requirement

Welding procedure

specification (WPS) Instructions to be available to welder, see appropriate part of EN 288 No requirement

Welding procedure

approval To appropriate part of EN 288, approved as application standard to contract demands No specific requirement

Work instructions Welding procedure specification (WPS) or dedicated

work instructions to be available No requirement

Batch testing of

consumables Only if specified in contract Not specified No requirement

Storage and handling of

welding consumables As per supplier recommended as minimum

Storage of parent

materials Protection required from influence by the environment; identification shall be maintained No requirement

Post-weld heat

treatment Specification and complete record necessary Confirmation to specification necessary No requirement

Inspection before,

during, after welding As required for specified operations Responsibilities as specified in contract

Non-conformances Procedures shall be available

Calibration Procedures shall be

Identification Required, when

appropriate Required, when necessary Not specified

Quality records Shall be available to meet the rules for product liability As required by contract

Retained for five years minimum

Tiêu đề	Quality Requirements For Welding Fusion Welding Of Metallic Materials — Part 1: Guidelines For Selection And Use
Trường học	British Standards Institution
Chuyên ngành	Quality Requirements for Welding
Thể loại	British Standard
Năm xuất bản	1995
Thành phố	London

Định dạng
Số trang	12
Dung lượng	389,17 KB