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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Special tests do not have any range of approval, outside izo range of tolerances for the test carried out. The number of fracture or transverse bend test specimens depends on the welding position. Aluminium and aluminium alloys — Part 3: PA Details of the weld type: If any of these conditions are not fulfilled, the approval shall be revoked. Owing to different training programmes in various countries, it is only proposed to standardize general objectives or categories of job knowledge. It is not intended that thicknesses or diameters should be measured precisely but rather the general philosophy behind the values given in tables 1 and 2 should be applied.
The examiner or examining body shall verify compliance with the above conditions and sign the prolongation of the welder’s approval test certificate. A change of process requires a new approval test.
BS EN ISO 9606-3:1999
Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Welding procedure specification for arc welding EN Non destructive testing — Penetrant testing 960-63 Part 1: Macroscopic tests shall be carried out in accordance with EN This standard is applicable when the welder’s approval testing is required by the purchaser, by inspection authorities or by other organizations.
One root fracture test specimen and one face fracture test specimen shall be tested. An approval test is on wrought material groups gives approval for cast material and a mixture of cast and wrought material in the same material group see 5.
Draft International Standards adopted by the Technical Committees are circulated to member bodies for voting. The specimen preparation, types of notch profiles and methods of fracture shall be in accordance with EN The test of job knowledge is limited to the matters related to the welding process used in the test.
When transverse bend testing is used, one root bend test specimen and one face bend test specimen shall be tested in accordance with EN Copper and copper alloys — Part 4: ISO consists of the following parts, under the general title Approval testing of welders — Fusion welding: The approval of the examiner or test body shall be obtained.
It does not cover fully mechanized and automatic processes see 5.
A full explanation of these imperfections is given in EN The macroscopic specimen shall be prepared and 9606-33 on one side to clearly reveal the weld see ENpolishing is not required. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
Preparation and fracture testing of test specimens for a fillet weld on plate 7. Dimensions in millimetres Figure izo A minimum weld length of mm is required, but not more than three test pieces. For a branch weld the range of approval is based on the diameter 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 shall be carried out on test pieces and is independent of the type of construction. For explanation of abbreviations used in the designation examples, see clause 4.
Each test specimen shall be positioned for breaking as shown in figure 6b, and examined after fracture. Dimensions of test piece for fillet weld s on plate Dimensions in millimetres Ixo 3: The actual tests of a welder’s job knowledge can be jso by any of the following methods or combinations of these methods: This 9660-3 Standard shall be given the status of a national standard, either by publication of an identical text or 9660-3 endorsement, at the latest by Augustand conflicting national standards shall be withdrawn at the latest 906-3 August However, it is possible for a welder to be approved for more than one welding process by a single test or by two separate approval tests to be used to cover a multi-process joint.
When fracture testing is used, it shall be carried out in accordance with EN This annex outlines the job knowledge that a welder should have to ensure that procedures are followed and common practices are complied with. Each change of the essential variables for the approval testing beyond the permitted ranges requires a new test and a new approval certificate. Steels — Part 2: Specified procedures shall be used for all destructive and non-destructive examinations.
Material groups according to CR 5. 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. Each criterion is considered to be a significant factor in the approval testing.
ISO 焊工的认可试验.熔焊.铜及铜合金 – MBA智库文档
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. One test piece per position.
For example in a case where approval is required for a single-side butt joint with the root to be welded by TIG without backing and to be filled by MIGthe welder can be approved by either of the following routes: Test specimen preparation, types of notch profiles and methods of fracture shall be in accordance with EN The following conditions shall apply: Preparation and fracture testing of test specimens for a fillet weld on pipe When macroscopic examination in accordance with EN is used, at least four test specimens shall be taken equally spaced around the pipe.
If the welder fails any of the prescribed tests, no certificate shall be issued.
When transverse bend testing is used, it shall be carried out in accordance with EN If the imperfections in the welder’s test piece exceed the permitted maximum specified, then the welder shall not be approved. The job knowledge indicated in this annex is only pitched iao the most basic level.