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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All relevant test conditions shall be recorded on the certificate. The macroscopic specimen shall be prepared and etched on one side to clearly reveal the weld see ENpolishing is not required.
The welding processes referred to in this standard include those fusion welding processes which are designated as manual or partly mechanized welding.
A welder is approved if the imperfections in the test piece are within the specified limits of level B in ENexcept for imperfection types as follows: Each position one face fracture or one face transverse bend or one side bend test specimen b Sectioning into at isl four test specimens c Inspection length of the test specimen NOTE Figure c shows the notch profile q d Fracture testing, face side e Fracture testing, root side Figure 7: For any copper alloy not covered by any of the copper groups the welder shall carry out an approval test, which only approves for that copper.
If the job knowledge test is carried out, it should be recorded on the welder’s certificate. When transverse bend testing is used, one root bend test specimen and one face bend test specimen shall be lso in accordance with EN In general, a welder’s approval test shall involve depositing weld metal having a chemical composition compatible with any copper in the parent metal group s.
The approval of the examiner or test body shall be obtained. Material groups according to CR 5.
BS EN ISO 9606-3:1999
It does not cover fully mechanized and automatic processes see 5. For explanation of abbreviations used in the designation examples, see clause 4. The actual questions used should be drawn up by the individual country, but should include questions on areas covered in clause A. 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 The format of this Annex A of EN The welding of any one material in a group confers approval on the welder for the welding of all other materials within the same group.
Copper and copper alloys — Part 4: If any of these conditions are not fulfilled, the approval shall be revoked. Reference should also be made to the corresponding acceptance criteria for non-destructive examination.
When required, visual examination can be supplemented by penetrant see EN or other test methods see table 6. The test weld can be used to approve a welding procedure and a welder provided that all the relevant requirements, e. The actual tests of a welder’s job knowledge can be given by any of the following methods or combinations of these methods: 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.
A test is listed for each of the ranges of plate thickness and pipe wall thickness or pipe diameter as specified in tables 1 and 2. Preparation and fracture testing of test specimens for a butt isk in plate 7. The test piece can be sectioned by mechanical means discarding the first and the last 25 iiso of the test piece at the end of the plates figures 5 and 6.
The number of fracture or transverse bend test specimens depends on the welding position. In some cases a welder approval test on a branch connection can be necessary. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. For all other welding positions, two root and two face bend test specimens shall be tested see figure 9660-3 b.
International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Specified procedures shall be used for all destructive and non-destructive examinations.
For welding position PA or PC, one root and one face bend test specimen shall be tested see figure 7 a. This standard applies to the approval testing of welders for the fusion welding of copper.
ISO 焊工的认可试验.熔焊.铜及铜合金 – MBA智库文档
Each test specimen shall be positioned for breaking as shown in figure 6b, and examined after fracture. For a branch weld the range of approval is based on the jso of the branch; f in cases where the majority of production work is predominantly branch welding or involves a complex branch connection, the welder should receive special training.
The welder’s approval test certificate shall be issued at least in one of the official CEN languages English, French, German. The test of job knowledge is limited to the matters related to the welding process used in the test. Steels — Part 2: