Full definition
American Society of Mechanical Engineers — one of the most influential standards organizations globally, publishing codes and standards for mechanical engineering, pressure equipment, and piping systems. Key codes: BPVC (Boiler and Pressure Vessel Code — Sections I-XII, mandatory for pressure vessels in most jurisdictions worldwide), B16 series (flanges, fittings, and valves — B16.5 pipe flanges, B16.20 spiral wound gaskets, B16.21 non-metallic gaskets), B31 series (piping — B31.1 power piping, B31.3 process piping), B106.1M (shaft design), and Y14.5 (GD&T). ASME codes are adopted by law in Mexico (NOM references ASME for pressure equipment), the US, Canada, and most industrial nations. ASME stamp (U, S, R, PP stamps) certifies that the fabricator meets ASME quality system and construction requirements. For industrial rubber: ASME BPVC governs rubber-lined pressure vessels (rubber lining must withstand design temperature/pressure without disbonding), and B16.20/21 define gasket dimensions for ASME flanges.