American Petroleum Institute

Steel Gate Valves - Flanged and Butt-welding Ends, Bolted Bonnets - THIRTEENTH EDITION; Effective Date: July 2015
 N STD 600

Annotation

This 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.

If product is supplied bearing the API Monogram and manufactured at a facility licensed by API, the requirements of Annex A apply.