ISO 13919-2 PDF

ISO 13919-2 PDF

Jun 20, 2020 Environment by admin

ISO. First edition. Welding — Electron and laser beam welded joints — Guidance on quality levels for imperfections —. Part 2: Aluminium. ISO Welding – Electron and laser beam welded joints – Guidance on quality levels for imperfections – Part 2: Aluminium and its. Welding – Electron and laser beam welded joints; Guidance on quality levels for imperfections – Part 2: Aluminium and its weldable alloys (ISO.

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Aluminium and its weldable alloys ISO Aluminium et ses alliages soudables ISO Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions.

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publication of an identical text or by endorsement, at the latest by Marchand conflicting national standards shall be withdrawn at the latest by March Thsi ruEnaepo radnatSs ds eht nevig eb llahtsuta fo s lanoitan atradnarehtie ,d yb cilbupfo noita citnedi naxet lat ro yb rodnesemsetal eht ta ,tnet yb raMch c dna ,fnocils lanoitan gnittradnasd sllah eb wirdhtwan ta eht setalt yb raMc.

BS EN ISO 13919-1:1997

It may be used within a total quality system for the production of satisfactory welded joints. It provides three sets of dimensional values from which a selection can be made for a particular application. The level should be prescribed before the start of production, preferably at the inquiry or order stage. For special purposes, additional details may need to 1919-2 prescribed. The quality levels given in this standard are intended to provide basic reference data and are not specifically related to any particular application.

They refer to welded joints and not the complete product or component itself.

It is possible, therefore, for different quality levels to be applied to individual welded joints in the same product or component. Quality levels are listed in table 1. If higher requirements are made on welds than uso with the above levels e.

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It would normally be hoped that for a particular welded joint the dimensional limits for imperfections could all be covered by specifying one quality level. In some cases, however, e. The choice of quality level for any application should take account of design considerations, subsequent processing, e. Economic factors are also important and should include not only the cost of welding but also that of inspection, test and repair. Although lso standard includes types of imperfections relevant to the electron and laser beam welding processes, only those which are applicable to the process and application in question need to be considered.

Imperfections are quoted in terms of their actual dimensions, and their detection and evaluation may require the use of 1399-2 or more methods of non-destructive testing. The detection and sizing of imperfections is dependent on the inspection methods and the extent of testing specified in the application standard or contract.

This standard does not include details of recommended methods of detection and sizing and, therefore, it needs to be supplemented by requirements for examination, inspection and testing. It should be appreciated that methods of non- destructive examination may not be able to give the detection, characterisation and sizing necessary for use within certain types of imperfections shown in table 2.

Although this standard covers material thicknesses penetration depths from 1 mm and above for electron and laser beam welding, it should be noted that the permitted size for all types of imperfection has an absolute, upper limit. Application for thicknesses above 50 mm for electron beam welding and 12 mm for laser beam welding is, for that reason, usually safe, but may be overly conservative and may iao special precautions, such as weld bead dressing in order to comply with the limits for reinforcement and undercut.

Attention should be paid to such precautions during approval testing of the welding procedure and alternative requirements may have to be specified, if necessary. Application for thicknesses below 1 mm is possible, but the requirements may be overly conservative for certain types of imperfections. Three levels are given in such a way as to permit application for a wide range of welded fabrications.

BS EN ISO +A 焊接电子束和激光焊接头缺陷的质量分级指南 第2部分:铝及其可焊合金 – MBA智库文档

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The levels refer to production quality and not to the fitness-for-purpose of the product manufactured. This standard applies to electron and laser beam welding of: When significant deviations from the joint geometries and dimensions stated in this standard are present in the welded product, it is necessary to evaluate to what extent the provisions of this standard can apply.

NOTE For circular welds, a lower quality level e. These normative references are cited at the appropriate places in the text and the publications are listed here after.

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.

Fusion welding ISO A welded joint should normally be evaluated separately for each individual type of imperfection.

Different types of imperfection occurring at any cross-section of the joint may need special consideration. In a dd itio n: The same requirements should, however, apply to identical parts produced in different workshops to ensure that work is carried out using the same criterias.

The consistent application of this standard is one of the fundamental cornerstones of a quality assurance system for use in the production of welded structures. There is a theoretical possibility of superimposed individual imperfections. In such a case the total summation of all permitted deviations should be restricted by the stipulated values for the different quality levels.

This standard may be used in conjunction with standards for acceptance levels for non-destructive examinations.