Should FG or G be used for welder projects of plug-in and fixed composite structures?
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Dear teachers, according to the interpretation of the old examination rules； Class D joint pipe + plate — 1) A groove is cut in the pipe; it belongs to the butt-welding structure type, and is covered by Class G welder qualifications (see Figures 1 and 2) ； 2) When a groove is made on the plate and it is of insert-type structure, should it be covered by FG category codes (Figure 3)? For a structure like the one shown in the appendix of GB/T150.3, where grooves are made on both the pipe and the plate, resulting in a composite structure that is both insert-type and fixed-type, should it be covered by G or FG category codes?
For composite structures with insert-type and embedded types, the FG category of welder qualifications should be used for coverage. .
Hello, is there any relevant source or standard definition?