PeterIgg
Petroleum
- Apr 6, 2003
- 99
Hi
I am looking for assistance in justifying why a flange with a gasket sealing surface finish with approx 80 grooves/inch, roughly 63 micro inch should be acceptable for a spiral wound gasket in a process gas line (LNG plant). I do not know why the valve has this finish, it should be as per ASME B16.5, but if I can avoid re-machining the face - so much the better.
B16.5 does not seem to give any latitude and PCC-1 similarly does not give any assistance. However if someone could give technical reasoning as to why the face could be acceptable, it would be appreciated.
Peter
I am looking for assistance in justifying why a flange with a gasket sealing surface finish with approx 80 grooves/inch, roughly 63 micro inch should be acceptable for a spiral wound gasket in a process gas line (LNG plant). I do not know why the valve has this finish, it should be as per ASME B16.5, but if I can avoid re-machining the face - so much the better.
B16.5 does not seem to give any latitude and PCC-1 similarly does not give any assistance. However if someone could give technical reasoning as to why the face could be acceptable, it would be appreciated.
Peter