thankyou for the information
These are as per SHELL standards
as you have said the hole side is upstream except for pump,psv discharge where it is on downstream side.
thanks
regards
prakash kamath prakash kamath
Can any body tell me the side of valve (upstream or downstream of flow) for the hole to be drilled on wedge(in case of gate valves) or ball(incase of ball valves) of cryogenic valves for safety.
What is the logic for selecting the side of hole drilled before installation?
regards
prakash...