Standard

API Std 608

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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.

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