T/ZZB 2512-2021 Pumped storage valve (Power station gate valve)
T/ZZB 2512-2021 Pumped storage valve (Power station gate valve)
Basic Information
Scope
Main technical content: This document specifies the structural form and basic parameters, basic requirements, technical requirements, test methods, inspection rules, marking, supply requirements, and quality commitments of gate valves used in power stations. This document is applicable to the design, manufacture, and acceptance of cast and forged gate valves with flange and welded end connections, including steel gate valves for various thermal power generation units with parameters of supercritical and subcritical, hereinafter referred to as gate valves. The parameter range is as follows: a) PN series: 1) Nominal pressure ≤ 80 MPa, maximum working temperature ≤ 430 °C; 2) Working pressure ≤ 35 MPa, maximum working temperature ≤ 625 °C; 3) Working pressure ≤ 8 MPa, maximum working temperature ≤ 648 °C. b) Class series: 1) Pressure class from Class 150 to Class 4500.