FAQ's

Is UNS S66286 acceptable for tubing hanger according to NACE MR0175?

What Grade of Stainless Steel is Suitable for a Tubing Hanger in an Environment with pH <3.5?

Answer:

This page provides an answer to an inquiry related to NACE MR0175/ISO 15156-3 Section A.8 Table A.26, which asks what grade of stainless steel meeting NACE requirements is suitable for a tubing hanger in an environment with pH <3.5.

The answer confirms that according to Table A.26, UNS S66286 is the only precipitation-hardenable stainless steel acceptable for tubing hangers in environments with pH <3.5. It's noted that martensitic stainless steels are also not acceptable for these environments.

This question pertains to NACE MR0175/ISO 15156-3 A.8, Table A.26, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2004-13.

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