On submerged arc welding – Welding procedure qualification
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NB/T47014 specifies that the groove shape is considered a evaluation factor in the assessment of submerged arc welding. The process evaluation conducted by our factory previously specified Q245R with a Type I groove of 10 mm, and the coverage range was up to 20 mm. The question now is: when welding a 20mm thick boiler shell in our factory, can we use a groove, specifically a V-shaped groove with an angle of 60°?
The ability to weld is a secondary factor among the evaluation criteria; it’s sufficient to prepare a new set of procedural guidelines. In 47014, except in the case of plasma arc welding, changes in groove shape have no impact on the other methods mentioned in Table 6. There is no need to introduce new evaluation criteria or additional welding tests – just another set of procedures needs to be developed.
Go and see what factors determine the angle of changing the groove shape. . Then I understood. . .
According to 47014, the groove shape is considered a secondary factor; in Table 6 on page 26, the symbol for this is “○”. According to the annotations, those that are considered process evaluation factors are the evaluation factors for this welding method.
Change the secondary factors and rewrite a WPS. . .