SS 316 for Vent line
SS 316 for Vent line
(OP)
We have a 3/4" vent line from equipment of SS304 (300#) material as per P&ID. After the Isolation valve (3/4") there is a spec break shown. The next specification stands for SS316 (150#) material. I want to clarify a doubt here. Why did the process engineer chose SS316(150#) instead of SS304(150#).
NOTE: Spec break is right after the socket welded isolation valve. i.e. on a welded joint
NOTE: Spec break is right after the socket welded isolation valve. i.e. on a welded joint





RE: SS 316 for Vent line
The moisture could make it more subject to corrosion.
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Plymouth Tube
RE: SS 316 for Vent line
Maybe this is forced by the plant specific piping classes/specifications.
RE: SS 316 for Vent line
RE: SS 316 for Vent line
Sure 316 more corrosion resistant, but if it's venting to atmosphere, the 304 would have been more than adequate and less costly.
Sounds like your Process Engineer should have consulted a Mechanical Engineer.