API RP 17L2 -2021 Recommended Practice for Ancillary Equipment for Flexible Pipes and Subsea Umbilic API SPEC 6A-2018 Specification for Wellhead and Tree Equipment (TWENTY-FIRST EDITION; API Monogram p API Spec 6D-2022 阀门规范 Specification for Valves API SPEC 15PX-2018 Specification for Crosslinked Polyethylene (PEX) Line Pipe (First Edition) API SPEC 20F-2018 Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries (S API RP 17Q-2018 Recommended Practice on Subsea Equipment Qualification (Second Edition) API TR 6MET-2018 Metallic Material Limits for Wellhead Equipment Used in High Temperature for API 6A API RP 578-2018 Guidelines for a Material Verification Program (MVP) for New and Existing Assets (Th