Purchase your copy of BS EN ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. A Reference number ISO (E) INTERNATIONAL STANDARD ISO First edition Approval testing of welders. ISO (E). INTERNATIONAL. STANDARD. ISO. First edition. Approval testing of welders — Fusion welding —. Part 3.
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The welding position H-L for pipes approves for all pipe angles in production work. A minimum weld length of mm is required, but not more than three test pieces.
BS EN ISO 9606-3:1999
For any copper alloy not covered by any of kso copper groups the welder shall carry out an approval test, which only approves for that copper. In addition to radiography, two bend tests, one face, one root see EN or two fracture tests, one face, one root see EN shall always be applied to butt welds.
These normative references are cited at the appropriate places in the text and the publications are listed hereafter.
Macroscopic tests shall be carried out in accordance with EN In general, a welder’s approval test shall involve depositing weld metal having a chemical composition compatible with any copper ido the parent metal group s. 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 welding position PA or PC, one root and one face bend test specimen shall be tested see figure 7 a.
The format of this Annex A of EN The test pieces shall be marked with the identification of the examiner and the welder before welding starts. The number of fracture or transverse bend test specimens depends on the welding position. However, some countries can require that the welder undergoes a test of job knowledge.
Draft International Standards adopted by the Technical Committees isso circulated to member bodies for voting. Throughout the text of this standard, read ” Aluminium and aluminium alloys EN Reference should also be made to the corresponding acceptance criteria for non-destructive examination. The approval of the examiner or test body 9606–3 be obtained.
The test pieces shall be welded in accordance with the nominal angles of the positions according to EN ISO For undated references the latest edition of the publication referred to applies. The welder’s approval test certificate shall be issued at least in one of the official CEN languages English, French, German. The actual tests of a welder’s job knowledge can be given by any of the following methods or combinations of these methods: One test piece per position.
Test methods Test method Butt weld plate Butt weld pipe Fillet weld Visual mandatory mandatory mandatory Radiography mandatory mandatory not mandatory Bend mandatory 1 mandatory 1 not mandatory Fracture mandatory 1 mandatory 1 mandatory 2 Macroscopic not mandatory not mandatory isoo mandatory 2 Penetrant not mandatory not mandatory not mandatory 1 Bend or fracture test shall be used, but not both test methods.
ISO 焊工的认可试验.熔焊.铜及铜合金 – MBA智库文档
Test specimen preparation, types of notch profiles and methods of fracture shall be in accordance with EN All relevant test conditions shall be recorded on the certificate. In some cases a welder approval test on a branch connection can be necessary.
If any of these conditions are not fulfilled, the approval shall be revoked. Material groups according to CR 5. Preparation and fracture testing of test specimens for a butt weld in plate 7. When macroscopic examination is used, at least four test specimens shall be taken equally spaced in the inspection length. The range of approval for each type of test is given in the relevant sub-clauses and tables. This standard applies to the approval testing of welders for the fusion welding of copper.
When the filler metal is dissimilar to the parent metal group, an approval for that combination of parent metal group and filler metal is needed, except when permitted by table 4. The acceptance requirements for imperfections found by test methods according to this standard shall, unless otherwise specified, be assessed following EN If the circumference is less than mm, additional weld test pieces will be required.
Owing to different training programmes in various countries, it is only proposed to standardize general objectives or categories of job knowledge.
If it is established that failure is attributed to the welder’s lack of skill, the welder shall be regarded as incapable of complying with the requirements of this standard without further training before re-testing. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
If the job knowledge test is carried out, it should be recorded on the welder’s certificate. For all other welding positions, two root and two face bend test specimens shall be tested see figure 7 b. Aluminium and aluminium alloys — Part 3: Each change of the essential variables for the approval testing beyond the permitted ranges requires a new test and a new approval certificate.
If the welder fails any of the prescribed tests, no certificate shall be issued.
A change of process requires a new approval test. If any special tests are to be carried out because of the characteristics of particular welding processes, materials or dissimilar alloys, these shall be defined prior to carrying out the welder’s test. If the imperfections in the welder’s test piece exceed the permitted maximum specified, then the welder shall not be approved.
A full explanation of these imperfections is given in EN When fracture testing is used, it shall be carried out in accordance with EN Nickel and nickel alloys — Part 5: The type of shielding gas shall not be incorporated in the designation but shall be included in the welder’s approval test certificate see Annex A of EN Fusion welded butt joints in steel plates up to 50 mm thick ISO Dimensions in millimetres Figure 1: This standard is intended to provide the basis for the mutual recognition by examining bodies for approval relating to welders’ competence in the various fields of application.