BS 1873:1975 specifies requirements for cast or forged carbon and alloy steel outside screw and yoke globe and globe stop and check valves with flanged or butt-welding ends. It covers straight, angle, and oblique Y patterns in nominal sizes from 15 mm to 400 mm and pressure Classes 150 through 2500.
The standard includes requirements for design, pressure and temperature ratings, materials, trim, markings, production pressure testing, shipping, packaging, and dimensional guidance. It addresses valves used in petroleum, petrochemical, and allied industries, including special applications involving corrosive environments and low-temperature service. This edition incorporates Amendment No. 1 and was confirmed in November 1983.
Application Scope: Petroleum, petrochemical, and allied industry piping systems requiring steel globe or globe stop and check valves with flanged or butt-welding ends.
