scope:

1.1 Scope

1.1.1 This standard covers steel gate valves with flanged or butt-welding ends in sizes NPS 1 through NPS 24. These sizes correspond to nominal pipe sizes in ASME B36.10M.

1.1.2 This standard covers valves in Classes 150 through 2500 as specified in ASME B16.34.

1.1.3 This standard covers requirements for a heavy-duty style of bolted bonnet gate valves for petroleum refinery and related applications where corrosion, erosion, and other service conditions indicate a need for full port openings, heavy body wall sections, and large stem diameters. Covered are requirements for outside screw-and-yoke (OS&Y) valves with rising stems, nonrising handwheels, and various types of gate configurations. In addition, Appendix A of this standard covers requirements specifically for pressure seal bonnet gate valves for both a heavy-duty style and a general purpose style for applications where less arduous corrosion and erosion service conditions are confronted or materials are selected so as to ameliorate these conditions.

1.1.4 Figure 1 illustrates a bolted bonnet gate valve for the purpose of establishing standard nomenclature for valve parts.

1.1.5 The dimensions in customary units are standard; metric (SI) units are included for reference.