ASME code for valves?

ASME code for valves?

• A. B16.34
• B. B16.5
• C. API 570
• D. B31.3

Answer: (A)

Valves have specific standards that define their geometry, end connections, and pressure–temperature ratings. The standard that covers valves directly is ASME B16.34. It provides the required dimensions for common valve types (ball, gate, globe, check, etc.), the accepted end connections (flanged, threaded, welded), materials, pressure–temperature ratings, and testing and marking requirements. This makes it the go-to reference when selecting or fabricating valves for piping systems. ASME B16.5, in contrast, covers pipe flanges and flanged fittings, not the valves themselves. API 570 is about Piping Inspection, Alteration, and Repair, focusing on integrity programs and inspections rather than valve design standards. B31.3 is the Process Piping code, which governs the overall design and safety of process piping systems but does not specify the valve dimensions and ratings in the same way as B16.34.

Valves have specific standards that define their geometry, end connections, and pressure–temperature ratings. The standard that covers valves directly is ASME B16.34. It provides the required dimensions for common valve types (ball, gate, globe, check, etc.), the accepted end connections (flanged, threaded, welded), materials, pressure–temperature ratings, and testing and marking requirements. This makes it the go-to reference when selecting or fabricating valves for piping systems.

ASME B16.5, in contrast, covers pipe flanges and flanged fittings, not the valves themselves. API 570 is about Piping Inspection, Alteration, and Repair, focusing on integrity programs and inspections rather than valve design standards. B31.3 is the Process Piping code, which governs the overall design and safety of process piping systems but does not specify the valve dimensions and ratings in the same way as B16.34.