1.1 This standard specifes the requirements for quarter turn metal plug valves, including the lift plug type, for the petroleum, petrochemical, and industrial applications.
1.2 This standard is applicable to:
— steel, nickel base, and other alloy plug valves with fanged or butt-welding ends and ductile iron plug valves with fanged ends in sizes 15 ≤ DN ≤ 900 ( 1 / 2 ≤ NPS ≤ 36);
— threaded or socket-welding end plug valves for sizes 15 ≤ DN ≤ 50 ( 1 / 2 ≤ NPS ≤ 2);
— plug valve bodies conforming to ASME B16.34, which may have any combination of fanged, threaded, socket welding, or butt-welding ends;
— lubricated and nonlubricated plug valves that have two-way coaxial ports.
NOTE Three-way and four-way plug valves do not fall under the scope of this standard.
— tandem plug valves that have two independent operating plugs in a single body.
1.3 This standard covers plug valves of the nominal diameter sizes DN:
— 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 650, 700, 750, 800, 850, 900;corresponding to nominal pipe sizes NPS:
— 1 / 2 , 3 / 4 , 1, 1 1 / 4 , 1 1 / 2 , 2, 2 1 / 2 , 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 26, 28, 30, 32, 34, 36;and applies to pressure class designations:
— 150, 300, 600, 900, 1500, 2500.
