API RP 934-C-2008
Materials and Fabrication of 1 1/4Cr-1/2Mo Steel Heavy Wall Pressure Vessels for High-pressure Hydrogen Service Operating at or Below 825 °F (441 °C) (First Edition)
- Standard No.
- API RP 934-C-2008
- Release Date
- 2008
- Published By
- API - American Petroleum Institute
- Status
- 2019-02
- Replace By
- API RP 934-C-2019
- Latest
- API RP 934-C-2019
- Scope
- This recommended practice presents materials and fabrication requirements for new 1 ?Cr-?Mo steel heavy wall pressure vessels and heat exchangers for high-temperature@ high-pressure hydrogen service. It applies to vessels that are designed@ fabricated@ certified@ and documented in accordance with ASME BPVC@ Section VIII@ Division 1 or Division 2. This document may also be used as a resource for equipment fabricated of 1Cr-?2Mo Steel. This document may also be used as a resource when planning to modify an existing heavy wall pressure vessel. The interior surfaces of these heavy wall pressure vessels may have an austenitic stainless steel or ferritic stainless steel weld overlay or cladding to provide additional corrosion resistance. For this recommended practice@ the heavy wall is defined as shell thickness 2 in. (50 mm) or greater but less or equal to 4 in. (100 mm). Integrally reinforced nozzles@ flanges@ tubesheets@ bolted channel covers@ etc. can be greater than 4 in. (100 mm). At shell or head thicknesses greater than 4 in. (100 mm)@ 1 ?Cr-?Mo has been shown to have difficulty meeting the toughness requirements given in this document. Although outside of the scope of this document@ it can be used as a resource for vessels down to 1 in. (25 mm) shell thickness with changes defined by the purchaser. This recommended practice is not intended for use for equipment operating above 825 ??(441 ?? or in the creep range.
API RP 934-C-2008 Referenced Document
- API RP 582 Recommended Practice Welding Guidelines for the Chemical, Oil, and Gas Industries*， 2023-05-01 Update
- API RP 934-A Materials and Fabrication of 2 1/4Cr-1Mo, 2 1/4Cr-1Mo-1/4V, 3Cr-1Mo, and 3Cr-1Mo-1/4V Steel Heavy Wall Pressure Vessels for High-temperature, High-pressure Hydrogen Service*， 2019-01-01 Update
API RP 934-C-2008 history
- 2019 API RP 934-C-2019 Materials and Fabrication of 11/4Cr-1/2Mo Steel Heavy Wall Pressure Vessels for High-pressure Hydrogen Service Operating at or Below 825 °F (440 °C) (SECOND EDITION)
- 2008 API RP 934-C-2008 Materials and Fabrication of 1 1/4Cr-1/2Mo Steel Heavy Wall Pressure Vessels for High-pressure Hydrogen Service Operating at or Below 825 °F (441 °C) (First Edition)
