SJones - partial pressure of H2S is discussed in ISO 15156-2. By your comment about the 0.05 psia threshold, are you just clarifying that it only applies to SSC or SCC only?
I like your reply with two answers, funny but wise. No dehydration unit operates properly 100% of the time, therefore I do not feel pretty much lucky. Thanks for the hint as well. I appreciate your feedback.
I agree, you are correct about bringing in a qualified person for writing the specification and I'm doing that. I probably should have asked more in a general sense rather than specific. I've studied Annex H and read through the MR0175 documents. I've also read through alot of your posts and...
I could use some help with understanding exactly how I should apply NACE MR0175/ISO 15156-1 and 15156-2 to the operating conditions below for linepipe in natural gas service. I'm preparing Specifications for API5L PSL 2 HFW pipe.
1a: 10,000 ppm H2S, 900 psig, dehydrated
1b: 10,000 ppm H2S...
