NACE
NACE MR0175
Materials for Use in H2S-containing Environments in Oil and Gas Production
Published jointly as NACE MR0175/ISO 15156. It sets the materials and hardness limits for sour service, which is why weld and heat affected zone hardness is controlled and verified after any repair.
This is an explanation, not the standard. PipingInspector is not affiliated with NACE and reproduces no part of the document. Always work to the current edition of the standard itself and to your project specification.
Where it is applied on this site
- Pipe materials — what the grade on the spec actually meansPiping
- Gaskets and bolting — why most flange leaks are assembly, not hardwarePiping
- Reading a line class — the document that has already decidedPiping
- Pipe support standards and details — reading SP-58, SP-69 and a project detail sheetPiping
- Preheat and post-weld heat treatment — hydrogen, hardness, and reading the chartPiping
- Material degradation — sensitisation, hardness limits and galvanic attackPiping