SSC resistant, NACE MR-01-75
SSC resistant, NACE MR-01-75
(OP)
hi,
what are the technical requirements for SSC (sulfide stress cracking) resistant carbon-steel materials (not forgings) that comply with NACE MR-01-75 standards.
Does ASME A105 material complies with this standard?
what must be the material type, hardness and composition etc..
thanks in advance.
what are the technical requirements for SSC (sulfide stress cracking) resistant carbon-steel materials (not forgings) that comply with NACE MR-01-75 standards.
Does ASME A105 material complies with this standard?
what must be the material type, hardness and composition etc..
thanks in advance.





RE: SSC resistant, NACE MR-01-75
NACE recently held a conference here. There is much discussion around NACE. In fact CAPP will be publishing a document at the end of December instructing or advising members on how to interpret the new ISO 15156/NACE MR0175. My current understanding is MR0175 - 2003 has been superceded by ISO15156. And MR0103 is a refinery spec. which Fisher complies to already.
RE: SSC resistant, NACE MR-01-75
Can i ask the technical requirements of MR0103 and ISO15156?
for example, what is the required hardness, CE and chemical composition for carbon-steel materials?
Does A105 do not comply these standards?
i have not possibility to have these standards.
thank you for kindness
RE: SSC resistant, NACE MR-01-75
Sorry, I do not have that type of information. For most of my applications, NACE is to deal with H2S. And for that, MR0175 compliant instruments is what we specify. I am on the other side - I rely on the certificates that my instruments/valves meet MR0103/75. I determine whether to use MR0103 or 75. Also, I am still awaiting the CPP guidelines - to determine when I should comply to one or the other.
The best I can do is that MR0103 deals more with chloride stress cracking than MR0175, which is more hydrogen stress cracking, I think.
Perhaps other mechanicals have the information and will share it in this thread.
RE: SSC resistant, NACE MR-01-75
RE: SSC resistant, NACE MR-01-75
3.2.1.1 Forgings ... provided the hardness does not
exceed 187 ...