API 600: Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets
API 600: Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets
API 600 standard specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion, and other service conditions would indicate a need for full port openings, heavy wall sections, and large stem diameters.
This standard sets forth the requirements for the following gate valve features:
— bolted bonnet,
— outside screw and yoke,
— rising stems,
— non-rising handwheels,
— single or double gate,
— wedge or parallel seating,
— metallic seating surfaces,
— flanged or butt-welding ends.
It covers valves of the nominal pipe sizes DN:
— 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050;
corresponding to nominal pipe sizes NPS:
— 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, 38, 40, 42;
and applies to pressure class designations:
— 150, 300, 600, 900, 1500, 2500.