scope:

This standard covers gray-iron, ductile-iron, and cast-steel, flanged-end, tight-shutoff, shaft- or trunnion-mounted, full-port, double- and single-seated ball valves for pressures up to 300 psi (2,100 kPa) in sizes from 6-in. through 48-in. (150-mm through 1,200-mm) diameter for use in water systems having fresh water with a pH greater than 6 and less than 12 and with temperatures greater than 32° F (0° C) and less than 125° F (52° C).

Design fluid velocity. The valve assembly and components shall be structurally suitable for a port fluid velocity of 35 ft/sec (10.7 m/sec) at design pressure and shall be within the allowable stresses noted in Sec. 4.3.1.1.

Pressure class and rated/design pressure. The classes of valves discussed in this standard shall be designed for the following maximum rated pressure. Rated pressure is defined as the design pressure at 100° F (38° C).

Purpose

The purpose of this standard is to provide purchasers, manufacturers, and constructors with the minimum requirements for 6-in. through 48-in. (150-mm through 1,200-mm) ball valves for water supply service, including material, design, inspection, testing, marking, handling, and packaging for shipment.