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ASME B16.34-2004 Specified Standard Pressure Class Valve Working Pressure and Test Pressure Ratings

This standard specifies the specific test pressures for shell tests, high-pressure seal tests, and high-pressure top seal tests for class 150 to class 2500.

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GB/T 12221-2005 Structural Length of Metal Valves

This standard specifies the structural lengths for flanged valves, welded-end valves, wafer-type valves, internally threaded valves, and externally threaded valves, along with the maximum and minimum deviations for their structural dimensions.

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GB/T 12238-2008 Flanged and Wafer-Type Elastomeric Sealed Butterfly Valves

This standard specifies the structural forms, technical requirements, materials, test methods and inspection rules, marking, painting, packaging, and storage and transportation for flanged and wafer-type elastic seal butterfly valves.

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