Manufacturing requirements
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In Sinopec Luoyang Engineering Co., Ltd.’s standard 70BJ021-2018, clause 5.11 states that \"All welds on the container that are covered by reinforcement rings, supports, gaskets, etc., must be polished to a smooth surface, and they must undergo 100% UT and MT testing in accordance with NB/T47013; the required pass level for both tests is Grade I.\" Does this clause refer to Class AB welds, or to Class ABCDE welds? Does it include the fillet welds between the pipes under the reinforcement rings and the shell?
Same as GB/T150.4 10.3.2
Is there a clear reply from the design institute?
Is there a clear reply from the design institute?
The covered welds refer to welds of type AB
This applies only to Type A and Type B welds; there is no such thing as grinding fillet welds to be perfectly flat. To reduce stress concentration, fillet welds are generally required to have smooth transitions.
The supervisor insisted on the joints between the take over and the shell, those types of fittings with reinforcement rings.
Use your common sense to think about it: can reinforcement rings, supports, or gussets be welded onto CDE-type welds?
The key supervisor believes that the fillet welds at the joints with reinforcement rings require U-testing. He believes that the welds where the take over meets the cylinder are covered by the reinforcement ring!