Australian/New Zealand Standard

Transcription

1 AS/NZS ISO :1999 ISO :1994 Australian/New Zealand Standard Quality requirements for welding Fusion welding of metallic materials Part 1: Guidelines for selection and use

2 AS/NZS ISO :1999 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee WD/3, Welding of Structures. It was approved on behalf of the Council of Standards Australia on 19 March 1999 and on behalf of the Council of Standards New Zealand on 5 April It was published on 5 June The following interests are represented on Committee WD/3: Association of Consulting Engineers, Australia Australian Chamber of Commerce and Industry Australian Industry Group Australian Institute of Steel Construction AUSTROADS Bureau of Steel Manufacturers of Australia Electricity Supply Association of Australia Institution of Engineers, Australia New Zealand Heavy Engineering Research Association New Zealand Non-destructive Testing Association Steel Reinforcement Institute of Australia University of Sydney Welding Technology Institute of Australia Additional interests participating in preparation of Standard: Welding consultant Review of Standards. To keep abreast of progress in industry, Joint Australian/ New Zealand Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto. Full details of all Joint Standards and related publications will be found in the Standards Australia and Standards New Zealand Catalogue of Publications; this information is supplemented each month by the magazines The Australian Standard and Standards New Zealand, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn Standards. Suggestions for improvements to Joint Standards, addressed to the head office of either Standards Australia or Standards New Zealand, are welcomed. Notification of any inaccuracy or ambiguity found in a Joint Australian/New Zealand Standard should be made without delay in order that the matter may be investigated and appropriate action taken. This Standard was issued in draft form for comment as DR

3 AS/NZS ISO :1999 Australian/New Zealand Standard Quality requirements for welding Fusion welding of metallic materials Part 1: Guidelines for selection and use First published as AS/NZS ISO :1999. Published jointly by: Standards Australia 1 The Crescent, Homebush NSW 2140 Australia Standards New Zealand Level 10, Radio New Zealand House, 155 The Terrace, Wellington 6001 New Zealand ISBN

4 ii PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WD/3, Welding of Structures. This Standard is identical with and has been reproduced from ISO :1994. This Standard is one of a series dealing with quality requirements for welding purposes. The series consists of the following Standards: AS/NZS ISO 3834 Quality requirements for welding Fusion welding of metallic materials ISO Part 1: Guidelines for selection and use (this Standard) ISO Part 2: Comprehensive quality requirements ISO Part 3: Standards quality requirements ISO Part 4: Elementary quality requirements The objective of this AS/NZS ISO 3834 series is to specify quality requirements for fusion welding of metallic materials and to provide guidance on quality management systems for fabrication, manufacture, construction and maintenance using such processes and materials. This Standard also provides for the use of the following Australian, New Zealand or other Standards as equivalents to the ISO Standards referenced herein: Reference to International or other Standard Equivalent Australian/New Zealand or International Standard ISO 3834 Quality requirements for welding Fusion welding of metallic materials Part 2: Comprehensive quality AS/NZS ISO 3834 Quality requirements for welding Fusion welding of metallic materials Part 2: Comprehensive quality requirements requirements Part 3: Standards quality requirements Part 3: Standards quality requirements Part 4: Elementary quality requirements Part 4: Elementary quality requirements 8402 Quality management and quality assurance Vocabulary 9001 Quality systems Model for quality assurance in design, development, production, installation and servicing 9002 Quality systems Model for quality assurance in design, development, production, installation and servicing EN 719 Welding coordination Tasks and responsibilities 8402 Quality management and quality assurance Vocabulary 9001 Quality systems Model for quality assurance in design, development, production, installation and servicing 9002 Quality systems Model for quality assurance in design, development production, installation and servicing ISO Welding coordination Tasks and responsibilities In Annex A, two errors have been corrected, which are indicated by a line set adjacent to the altered text. Standard requirements are covered by ISO and elementary requirements are covered by ISO As this Standard is reproduced from an international Standard, its number does not appear on each page of text and its identity is shown only on the cover and title page. The term informative has been used in this Standard to define the application of the annex to which it applies. An informative annex is only for information and guidance.

5 iii CONTENTS Page Introduction... iv 1 Scope Normative references Definitions Selection of welding quality requirements... 2 Annexes A Flow diagram for selection of welding quality requirements... 3 B Summary comparison of welding quality requirements with regard to ISO , ISO and ISO C Bibliography... 6 Copyright STANDARDS AUSTRALIA/ STANDARDS NEW ZEALAND Users of Standards are reminded that copyright subsists in all Standards Australia and Standards New Zealand publications and software. Except where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia or Standards New Zealand may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia or Standards New Zealand. Permission may be conditional on an appropriate royalty payment. Australian requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia. New Zealand requests should be directed to Standards New Zealand. Up to 10 percent of the technical content pages of a Standard may be copied for use exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia or Standards New Zealand. Inclusion of copyright material in computer software programs is also permitted without royalty payment provided such programs are used exclusively in-house by the creators of the programs. Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended or revised. The number and date of the Standard should therefore be clearly identified. The use of material in print form or in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty. This policy may be varied by Standards Australia or Standards New Zealand at any time.

6 iv 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 ISO 9000 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 an effective welded fabrication, management needs to appreciate the sources of potential trouble and to introduce appropriate quality procedures.

7 AUSTRALIAN/NEW ZEALAND STANDARD 1 Quality requirements for welding Fusion welding of metallic materials Part 1: Guidelines for selection and use 1 Scope The guidelines given in this part of ISO 3834 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 any type of fusion welded construction. They relate only to those aspects of the quality of the final construction which may be influenced by welding and allied processes. These 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 manufacturers welding quality arrangements. These 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. They are intended to be used for the following purposes: a) providing interpretation of the requirements in the ISO 9000 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 ISO 9001 and ISO 9002 is not involved; (c) assessment of the welding quality requirements mentioned in a) or b) above. The application of this 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 The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 3834 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of COPYRIGHT

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