Pipe Marker Requirements: ASME A13.1 Decoded (2026 Guide)
Federal OSHA has no general-industry pipe-marking standard, and the 1956 edition it does incorporate is 67 years behind the one vendors sell today. This guide locates the duty section by section, then gives the two tables a specifier actually needs: the full ASME A13.1-2023 colour scheme and the marker size schedule by pipe diameter.
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