NACE SP0170 is a copyrighted document published by AMPP (The Association for Materials Protection and Performance, formed by the merger of NACE International and SSPC). While this article provides an expert overview, you must purchase the official NACE SP0170 PDF 2021 from the AMPP website or authorized distributors for legal engineering use.
"If my material meets NACE TM0177, it passes SP0170." Truth: Not always. TM0177 is a test method (e.g., Method A for tensile testing). SP0170 is a materials selection standard that references specific test results. You must meet the acceptance criteria defined in SP0170, not just run the test. nace sp0170 pdf 2021
The standard provides specific mitigation methods to protect equipment—such as heaters, tubes, and reactors—during the downtime, shutdown, and startup phases of refinery operations. PTA SCC occurs when sulfide corrosion products react with oxygen and water to form polythionic acids, which can rapidly cause cracking in sensitized austenitic alloys. NACE SP0170 is a copyrighted document published by