GB/T 46814-2025 Specification for power station valves
GB/T 46814-2025 Specification for power station valves
Basic Information
Scope
This document specifies the parameters and models of power station valves, ordering requirements, general requirements, pressure and temperature ratings, design, materials, manufacturing, inspection, testing and acceptance, marking, painting, packaging, supply and storage, delivery documents, installation, commissioning and maintenance requirements.
This document applies to the design, manufacture and acceptance of cast, forged and welded valves with flange, thread and welded end connections, including shut-off valves, gate valves, plug valves, check valves, safety valves, relief valves, regulating valves, pressure relief valves, temperature relief valves, throttle valves, water distribution valves, drain valves, quick-opening and -closing valves, butterfly valves, ball valves, outlet valves of circulating pumps, interlock valves, high-pressure heat exchanger three-way valves, steam extraction check valves, and other valves used in thermal power generation units. The parameter range is:
a) Pressure class less than or equal to PN 800, maximum working temperature less than or equal to 430 °C;
b) Pressure class from Class 150 to Class 4500;
c) Working pressure less than or equal to 38.5 MPa, maximum working temperature less than or equal to 625 °C;
d) Working pressure less than or equal to 16 MPa, maximum working temperature less than or equal to 648 °C.
Valves used in other steam parameter units, industrial boilers, waste heat boilers, and other special equipment can be referenced and adopted accordingly.