Hi,
We are doing butt weld in extended bonnets (pressure containing part of a valve)
Material : Carbon steel & Stainless steel
Base material thickness varies from : 5.0 mm to 80.0 mm
Design will be like, upper case + Pipe + Lower case. (2 joints in a single bonnet)
Currently i am insisting to do RT exam for all welds.
I would like to know any code / standard tells about the RT exam requirement for these kind of welded joints?
Our product is Valves.
Regards,
Rakhul.