2025 ASME BPVC, Section X, Fiber-Reinforced Plastic Pressure Vessels

ASME Section X provides requirements for construction of an FRP pressure vessel in conformance with a manufacturer’s design report. It includes production, processing, fabrication, inspection and testing methods required for the vessel. ASME BPVC Section X includes three Classes of vessel design; Class I and Class III – qualification through the destructive test of a prototype and Class II – mandatory design rules and acceptance testing by nondestructive methods. These vessels are not permitted to store, handle or process lethal fluids. Vessel fabrication is limited to the following processes – bag-molding, centrifugal casting and filament-winding and contact molding. General specifications for the glass and resin materials and minimum physical properties for the composite materials are given.

For vessels fabricated in accordance with these rules, the provisions of ASME Section X shall apply over any other sections of the Code. When metallic components are part of fiber‐reinforced plastic vessels, they shall meet the provisions of ASME Section VIII Division 1.

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