USE 316 SS GASKET IN SOUR SERVICE

[Beginner - Inspector]

Dear Sir
Please kindly advise me, whether I can Use SS316 Gasket In wet Sour Service. Whether use of it is violating the NACE MR0175 Requirements. Whether it is Prone to HIC ?

Regards
Viswa Manoj

 

[SJones]

Austenitic stainless steel does not suffer from HIC. As to whether there is an SSC issue, you will need to assess the process conditions against the limits of NACE MR0175, or you agree with the end user that the system is a permitted exclusion. From the terminology, are you sure that it is MR0175, and not MR0103?

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[0707]

I am not so sure if Austenitic stainless steel is imune from HIC. I agree that with some components addictions and stabilized it will be resistente but not imune to HIC.

luis marques

 

[SJones]

@)0707 - HIC, in the sense of ISO 15156/NACE MR0175, only applies to carbon steel. Check definition 3.12 in ISO 15156-1.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[Beginner - Inspector]

Dear Mr.SJones (Petroleum) & 0707

Thanks for your reply. As per the engineering Department they claim that as per ASME 31.3(2018) PARA 302.2.5 Ratings at Junction of Different Services. When two services that operate at different pressure–temperature conditions are connected, the valve segregating the two services shall be rated for the more severe service condition. So their point is that they can use that CS gaskets and spectacle blind at that point since which has higher pressure rating.

 

[0707]

I don´t clearly understand your question try to be a little more clear, so I can help.

lm