Butterfly valve national standard refers to the standard approved and issued by the national standardization authority and unified nationwide. The national standard is a unified technical requirement in the whole country. The Department of standardization administration under the State Council shall prepare the plan, coordinate the division of work, organize the formulation (including revision), and uniformly approve, number and issue the plan. If the law provides otherwise for the formulation of national standards, the provisions of the law shall prevail.
The national standards for butterfly valves are as follows:
Standard number The name of the standard
DUT746-2001 Guidelines for the selection of power plant butterfly valves
GB/T12238-1989 Universal valve flange and wafer butterfly valve
