This standard specifies the requirements for metal ball valves suitable for petroleum, petrochemical, and industrial applications—corresponding to the nominal pipe sizes in ASME B36.10—that have:• flanged ends in sizes DN 15 through DN 600 (NPS 1/2 through NPS 24);• butt-welding ends in sizes DN 15 through DN 600 (NPS 1/2 through NPS 24);• socket-welding ends in sizes DN 8 through DN 50 (NPS 1/4 through NPS 2); and• threaded ends in sizes DN 8 through DN 50 (NPS 1/4 through NPS 2).This standard applies to metal ball valves with pressure classes as follows:• flanged ends in Classes 150, 300, and 600;• flanged ends in Classes 900, 1500, and 2500 in sizes DN 15 through DN 50 (NPS 1/2 through NPS 2) only;• butt-welding ends in Classes 150, 300, and 600;• butt-welding ends in Classes 800, 900, 1500, and 2500 in sizes DN 15 through DN 50 (NPS 1/2 through NPS 2) only;• socket-welding ends and socket-welding by threaded ends in Classes 150, 300, 600, 800, 900, 1500, and 2500;• threaded ends in Classes 150, 300, 600, and 800.This standard establishes requirements for bore sizes described as:• full bore;• reduced bore.