BS EN 288-5-1995 金属材料焊接工艺规范和认可 第5部分：使用已认可焊条的电弧焊的认可.pdf

BRITISH STANDARD BS EN 288-5: 1995 Specification and approval of welding procedures for metallic materials Part 5: Approval by using approved welding consumables for arc welding The European Standard EN 288-5:1994 has the status of a British Standard UDC 621.791.75:669:621.791.04:658.562 BS EN 288-5:1995 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 February 1995 © BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference WEE/36 Draft for comment 92/82570 DC ISBN 0 580 23694 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: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standard FinlandSuomen Standardisoimisliito, r.y. FranceAssociation française de normalisation GermanyDeutsches Institut für Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portuguès da Qualidade SpainAsociación Española de Normalización y Certificación SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.Date Comments BS EN 288-5:1995 © BSI 1998i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 288-53 National annex NA (informative) Committees responsible6 National annex NB (informative) Cross-referencesInside back cover BS EN 288-5:1995 ii © BSI 1998 National foreword This British Standard has been prepared under the direction of the Engineering Sector Board and is the English language version of EN 288 Specification and approval of welding procedures for metallic materials Part 5: Approval by using approved welding consumables for arc welding, published by the European Committee for Standardization (CEN). EN 288-5 was produced as a result of international discussions in which the United Kingdom took an active part. There has previously been no direct British Standard equivalent to this standard. 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. EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 288-5 August 1994 UDC621.791.75:669:621.791.04:658.562 Descriptors: Welding, arc welding, metals, procedure, qualification English version Specification and approval of welding procedures for metallic materials Part 5: Approval by using approved welding consumables for arc welding Descriptif et qualification dun mode opératoire de soudage pour les matériaux métalliques Partie 5: Qualification par utilisation de produits consommables de soudage agréés pour le soudage à larc Anforderung und Anerkennung von Schweißverfahren für metallische Werkstoffe Teil 5: Anerkennung durch Einsatz anerkannter Schweißzusätze für das Lichtbogenschweißen This European Standard was approved by CEN on 1994-08-17. 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 288-5:1994 E EN 288-5:1994 © BSI 1998 2 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 121, Welding, the secretariat of which is held by DS. This standard consists of the following parts: Part 1: General rules for fusion welding; Part 2: Welding procedure specification for arc welding; Part 3: Welding procedure tests for the arc welding of steels; Part 4: Welding procedure tests for the arc welding of aluminum and its alloys; Part 5: Approval by using approved welding consumables for arc welding; Part 6: Approval related to previous experience; Part 7: Approval by a standard welding procedure for arc welding; Part 8: Approval by a pre-production welding test. 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 February 1995, and conflicting national standards shall be withdrawn at the latest by February 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 Foreword2 0Introduction3 1Scope3 2Normative references3 3Definitions4 4Preliminary welding procedure specifications (pWPS)4 5Approval of the welding procedure4 6Range of approval4 6.1General4 6.2Related to the manufacturer4 6.3Related to the material4 6.4Common to all welding processes5 6.5Specific to each welding process5 7Validity5 8Documentation5 Table 1 Applicable welding processes3 Table 2 Applicable groups of materials4 EN 288-5:1994 © BSI 19983 0 Introduction In EN 288-1, one of the methods of welding procedure approval is by using approved welding consumables. 1 Scope This standard simplifies the approval of welding procedures especially for repetitive operations. The standard gives the necessary information to explain the requirements referenced in EN 288-1 about the approval of welding procedures using approved consumables. In addition it gives the range of approval and the validity. This standard applies to fusion welding of metallic materials. The process numbers refer to EN 24063. Essentially this standard covers the processes with consumables given in Table 1. Other fusion welding processes may be accepted by agreement between contracting parties. It is intended for application to parent metals which produce acceptable micro structures and properties in the heat affected zone which do not deteriorate significantly in service. This standard is not applicable where hardness or impact properties, preheating, control heat input, interpass temperature and post-weld heat-treatment are specified. The use of this standard may also be restricted by an application standard or at the enquiry/order stage by contracting parties. 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. EN 288-1, Specification and approval of welding procedures for metallic materials Part 1: General rules for fusion welding. EN 288-2, Specification and approval of welding procedures for metallic materials Part 2: Welding procedure specification for arc welding. EN 288-3, Specification and approval of welding procedures for metallic materials Part 3: Welding procedure tests for the arc welding of steels. EN 288-4, Specification and approval of welding procedures for metallic materials Part 4: Welding procedure tests for the arc welding of aluminium and its alloys. EN 439, Welding consumables Shielding gases for arc welding and cutting. EN 24063, Welding, brazing, soldering and braze welding of metals. Nomenclature of processes and reference numbers for symbolic representation on drawings. Table 1 Applicable welding processes ProcessProcess applicable for steel Process applicable for aluminium and its alloys NumberType 111Metal arc welding with covered electrode× 114Flux cored wire metal-arc welding without gas shield× 131Metal-arc inert gas welding; MIG welding× 135Metal-arc active gas welding; MAG welding× 136Flux cored wire metal-arc welding with active gas shield× 137Flux cored wire metal-arc welding with inert gas shield× 141Tungsten inert gas arc welding; TIG welding×× Key × indicates the process for which the standard is applicable indicates the process for which the standard is not applicable. EN 288-5:1994 4 © BSI 1998 3 Definitions For the purpose of this standard, the definitions listed in EN 288-1 shall apply. 4 Preliminary welding procedure specifications (pWPS) The approval of a welding procedure based on approved consumables shall be based on a pWPS according to EN 288-2. This pWPS shall specify the range for all the relevant parameters. 5 Approval of the welding procedure The approval of the welding procedure shall be carried out by an examiner or test body according to EN 288-1. The essential items for the approval are: specifications of parent metal(s) to be used according to the relevant EN, records of the approved consumables to be used according to the relevant EN, a specific pWPS according to EN 288-2 and suitable for the application. 6 Range of approval 6.1 General All the conditions of validity stated below shall be met independently of each other. Changes of essential variables outside of the ranges specified shall require another welding procedure approval. 6.2 Related to the manufacturer An approval of WPS obtained by a manufacturer is valid for welding in workshops or sites under the same technical and quality control of that manufacturer. 6.3 Related to the material 6.3.1 Related to parent metal This standard is applicable for limited groups of materials defined in Table 2 and fulfilling all the conditions stated below. a) The application standard or contract does not specify Charpy testing or hardness testing of the material in the heat affected zone. b) Other mechanical properties (e.g. yield strength) resistance to corrosion and other essential properties of the material in the heat affected zones can be expected to be essentially unaffected by the welding and that testing is not considered necessary. c) The combination of parent metal(s) and consumables is such that the properties of the weld metal can be expected to correspond to the properties obtained during the approval testing of the consumable. Usually, this means that the consumable and the parent metal shall have: 1) similar mechanical properties for steels in group 1; 2) similar chemical composition for steels in group 9; 3) a compatible filler metal for aluminium and its alloys in groups 21, 22a and 22b; and that weld metal composition mainly is determined by the composition of the consumable. Table 2 Applicable groups of materials Joints between dissimilar material groups are not permitted, except for joints between group 22a and group 22b. 6.3.2 Parent metal thickness A welding procedure using approved consumables shall not be approved for thicknesses below 3 mm or above 40 mm. 6.3.3 Fillet weld throat thickness A welding procedure using approved consumables shall not be approved for fillet weld throat thickness below 3 mm. 6.3.4 Diameter of pipes Approved welding procedures using approved consumables are only valid for pipes with outside diameters 25 mm. 6.3.5 Branch connection For thickness: see 6.3.2. For diameter: see 6.3.3 EN 288-3EN 288-4 SteelAluminium and its alloys 1c21c 922a Specified materialsabc 22bc a Materials of group 9 excluding those which are sensitive to hot cracking. b A list of the acceptable materials will be added when the relevant EN are available. c Including casting, forged and wrought material with a similar chemical composition. EN 288-5:1994 © BSI 19985 6.4 Common to all welding processes 6.4.1 Welding process Multi-process procedures are permitted providing approved consumables are used throughout the weld. In a multi-process procedure the approval is only valid when the processes are used in the approved specified sequence. 6.4.2 Welding positions The position is restricted to the range of approval of the approved consumables. 6.4.3 Type of joint No limitation. 6.4.4 Filler metal classification The approval is valid for any approved filler metal with the same compulsory classification as required by the relevant filler metal specification. In addition, non-compulsory classification should be included wherever possible. 6.4.5 Type of current No change is permitted. 6.5 Specific to each welding process 6.5.1 Processes 111 and 114 The approval given is valid for the diameter of electrode mentioned in the pWPS plus or minus one electrode diameter size for each run, with the exception of the root run on single sided without backing butt welds for which no size change is permissible. 6.5.2 Processes 131, 135, 136 and 137 The approval given is restricted to the face and/or back shielding type of gas (nominal composition) mentioned in the pWPS and shall be in accordance with EN 439. The approval is restricted to the single-wire mentioned in the pWPS. 6.5.3 Process 141 The approval given is restricted to the face and/or back shielding type of gas (nominal composition) mentioned in the pWPS. 7 Validity The welding procedure given is valid providing the approval of the consumables remains valid. 8 Documentation The pWPS accepted by the examiner or a test body si