Dear Experts
we had carried out J-type groove welding for 10" Pipe with 10"Valve due to difference in thickness of Pipe(42 mm) and valve(48 mm) and internal mismatch was removed by grinding on higher thickness. Now we have to do hydro testing at pressure of 430Kg/Cm2 for an internal mismatch joint. But Owner is asking for engineering approval of this before hydro test. Can you please tell us whether this is ok and what are the guidelines for tapering and joint details in this case and where it is referred in Piping Codes/Standard. Sketch is attached for reference.
Regards
Sourabh
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