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What does “17-4PH service tool applications mean” in NACE MR0175 Table A.28,?

Question: Can you provide clarification on NACE MR0175/ISO 15156-3, Table A.28: “UNS S17400 …. has been used in service tool applications at the surface when stressed at less than 60% of its minimum specified yield strength under working conditions.” This Table also lists “Internal Components for Valves, Pressure Regulators, and Level Controllers”. What exactly do service tool applications encompass?

Answer:

This paragraph is intended to apply to components that are temporarily installed at the surface as part of routine well servicing. For example, components of wireline valves used during a wireline job are considered as service tools.

This question is in relation to NACE MR0175/ISO 15156-3 A.8.2, Table A.28

Reference: ISO 15156 Maintenance Panel Inquiry #2003-32

Update April 2016: NACE MR0175 2015 – Technical Circular 1 has implications for 17-4PH. Contact us for more details.

Are you using 17-4PH (UNS s17400) as a material for sour environments? We can provide support in 17-4PH metallurgy to safeguard the integrity of your asset.

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