316/316L stainless steel and UNS N08825 for Sour Environment
316/316L stainless steel and UNS N08825 for Sour Environment
(OP)
Dear member,
In project piping material specification, client specified "SOUR" in item descriptions of 316/316L stainless steel and UNS N08825 piping components including valves to meet the requirements of NACE MR0175/ISO 15156.
I think that 316/316L and UNS N08825 basically meet the requirements of NACE MR0175/ISO 15156. So the item descriptions of those materials for both "SOUR" and "Non-SOUR" services shall be same.
Am I correct?
If not so, please give me the details....
Thanks.......
In project piping material specification, client specified "SOUR" in item descriptions of 316/316L stainless steel and UNS N08825 piping components including valves to meet the requirements of NACE MR0175/ISO 15156.
I think that 316/316L and UNS N08825 basically meet the requirements of NACE MR0175/ISO 15156. So the item descriptions of those materials for both "SOUR" and "Non-SOUR" services shall be same.
Am I correct?
If not so, please give me the details....
Thanks.......





RE: 316/316L stainless steel and UNS N08825 for Sour Environment
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: 316/316L stainless steel and UNS N08825 for Sour Environment
I believe you have the correct answer from Steve.
Basically they (in sour and non-sour) should be different specs because the different requirements of the valve components (probably due to sour and/or other corrosion mechanisms) as well as the different hardness requirements of the base metals (due to sour service) are expected.
Once the 316/316L/825 are selected, there are some other corrosion mechanisms in these services.
RE: 316/316L stainless steel and UNS N08825 for Sour Environment
Unfortunately, this document can be a little confusing and difficult to follow if you're not familiar with it so feel free to post again if you need some help interpreting.
RE: 316/316L stainless steel and UNS N08825 for Sour Environment
S
Corrosion Prevention & Corrosion Control