The company I work for builds instrumentation for the oil & gas industry. The pressure containing parts of one of the products is built to B31.3 They are welding a 2-1/2" s/10 weld cap to S/10 pipe (316/316L). But instead of holding the root gap open and full pen. welding, they lay the cap directly on the pipe and weld. This is not a full pen weld! They don't wantto change so I am asked to determine what the strength of the gauge should be. I can determine this strength using engineering techniques of analysis but I would ask the forum what is the proper method to use. Especially since it is supposed to comply with B31.3
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