Welding Fabrication Standards - EWF

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Welding Fabrication Standards Page 28 - inspection and destructive and non destructive testing; - equipment for heat treatment (suitability, maintenance, etc.); - heat treatment parameters; - heat treatment specification; - measuring of parameters; - heat treatment records. In particular a PWHT procedure shall be produced by the Manufacturer or by the potential supplier, though approved by the Manufacturer’s Welding Coordinator according to the Customer or Standard/code requirements. It has to be compatible with the parent material, the welded joint, the construction etc. Moreover, the heat treatment shall be recorded during the process to evidence that the specification has been followed as well as to ensure the traceability for the particular product. Figure 8 – Equipment for the heat treatment control The technical report CR/ISO TR 17663 is a reference for the management of the heat treatment activities. 2.11 Inspection and testing In order to guarantee the application of all the fabrication procedures and the required properties for the product, appropriate inspections and tests shall be implemented during the manufacturing process Istituto Italiano della Saldatura Lungobisagno Istria, 15 - 16141 Genova (I) - Tel. 01083411 - Fax 0108367780
Welding Fabrication Standards Page 29 Location and frequency of such inspections and/or tests will depend on the contract and/or product standard, on the welding process and on the type of construction. As a general rule the state of inspection and testing of the welded product have to be indicated in some way. Such a means shall be adequate to the type of product; as an example, a Fabrication and Control Plan may be required for big products (on which the testing activities are marked); while routing cards or confined space inside the manufacturing plant shall be sufficient for small series product to indicate the inspection and testing status. Table 5 reports a typical chart for tests to be carried out before, during and after welding operations. In some situations, the signature of the inspector 7 shall be required in order to enhance the traceability of the welding and related process activities. Moreover, the reference number of the relevant test report shall be included, if required. All the procedures or instructions relevant to inspection and testing shall be made available to the inspection personnel, and properly controlled. As to NDT, testing activities (method, technique and extension) shall be carried out in consideration of and in accordance with the quality level of the product. Some of those parameters are reported in the manufacturing codes, where the designer chooses the class of the weld taking into consideration all of the above mentioned factors. All these aspects should be considered during the design review phase by the welding coordinator. Figure 9 – Welding gauge for Visual Inspection of joints 7 For some tests or checks (e.g. welding parameters, dimensional checks, visual testing, etc.) the welder or welding operator itself shall be considered as inspector. Istituto Italiano della Saldatura Lungobisagno Istria, 15 - 16141 Genova (I) - Tel. 01083411 - Fax 0108367780
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Welding Fabrication Standards - EWF

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