High temperature and pressure stop valve valve power station technical conditions "a"
June 12 13:10:53, 2024
People's Republic of China Power Industry Standard DL / T 531-94 power station high temperature and high pressure stop valve gate valve Technical Specification of High Temperature High Pressure Globe Stop Valves and Gate Valves for Power Station People's Republic of China Ministry of Electric Power 1994-03-18 approved 1994 - 10-01 Implementation 1 Subject Matter and Scope This standard specifies the classification of high temperature and high pressure stop valves and gate valves for power plants and product quality requirements. This standard applies to the nominal pressure pN is 20,25,32 MPa, the working temperature is equal to or lower than 425 ℃; working pressure p is 10,14,17 MPa, the working temperature is 510,540,570 ℃; working medium is water, steam Shut-off valve, gate valve. 2 reference standard JB 2765 valve terminology JB 4018 power station valve preparation method ZBJ 98015 pressure-bearing steel casting technical conditions GB 12231 valve castings appearance quality requirements JB 2633 boiler forgings GB 1176 casting copper alloy technical conditions GB 699 high-quality carbon Technical conditions of structural steel GB 3077 alloy structural steel technical conditions Classification and technical conditions of GB 979 carbon steel castings GB 4981 pressure test of industrial valves GB 6414 casting dimensional tolerances GB 1804 tolerances and tolerances with tolerance limits of non-dimensional deviation GB 3595 power station Valve manufacturing technology GB 5677 casting radiographs and film classification methods GB 7233 steel castings ultrasonic flaw detection and quality rating method GB 9443 steel castings penetrant detection and quality rating method GB 9444 castings magnetic particle inspection and quality rating method SDB DZ Series Valve Actuator SDZ packaging General technical conditions 3 Terms Shut-off valve - Opening and closing pieces (valve flap) by the stem along the valve seat (sealing surface) axis for lifting movements of the valve; gate valve - opening and closing pieces (gate) Driven by the valve stem along the seat sealing surface Lifting movement of the valve;
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