Materials used for pressure containing or pressure controlling components should be compatible with the specified fluids.
Ring grooves, seat pockets, and metal seal surfaces should be inlaid with Inconel 625, unless the parent material is of sufficient corrosion resistant alloy (CRA) type. Materials should provide the necessary corrosion and erosion resistance.
The product specification level (PSL) referenced in API SPEC 17D for all hydrocarbon-wetted bore pressure containing equipment should be PSL 3, including Charpy Impact tests at 0°F, per API SPEC 6A (e.g., tree body, tree cap, choke systems, tubing hanger, valve bodies, connectors, etc.). All other components and pressure containing assemblies should be to PSL 2.
Valve testing requirements should be PSL 3 with gas testing. All other components and pressure containing assemblies, including final stack up of the tree assembly, should be to PSL 2, through FAT. All valve components, tree assemblies and other equipment (where applicable) should be API monogrammed 17D, PSL3.