Radiographic inspection issues for the edge plates of large storage tank bottoms
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According to GB50128-2014, page 32, clause 7.2.3, sub-clause 3: For the bottom edge plates of tanks with a thickness of 10 mm or more, radiographic inspection shall be carried out on 300 mm from the outer end of each butt weld； But during on-site construction, the floor slab has already been laid on the foundation; with the radiation source placed on one side of the slab, how can imaging be done on the other side? Is it necessary to lift the entire floor slab? I would like to ask the experts how flaw detection is carried out in practice?
Radiographic inspection of the edge plate butt welds is always carried out with shims in place.
After the welding inspection is complete, place it in position