02292020Sat
Last updateFri, 28 Feb 2020 5pm

NACE MR0175/ISO 15156

materials_q_and_a_graphicQ: I see that there is a new version of NACE MR0175 called NACE MR0175/ISO 15156. Why did MR0175 become an ISO standard, and how do the requirements in the ISO version differ from those in the previous version?


Wrong Alloy?

materials_q_and_a_graphicQ: My 316 stainless-steel valve is rusty and attracts a magnet. Did I get the wrong alloy?

 

ASTM A890

materials_q_and_a_graphicQ: Our piping specification requires that duplex stainless-steel castings be supplied per ASTM A890. A valve company took exception, and indicated that duplex valve bodies and bonnets would be supplied per ASTM A995. What is the difference between these specifications?

PMI Analysis

materials_q_and_a_graphicQ: Why does the valve supplier refuse to accept my claim that its material is out of specification based on my PMI analysis?

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