API Std 608-2013 Draft. Metal Ball Valves-Flanged, Threaded and Welding Ends

American Petroleum Instltute (API) Fifth Edition, Draft. 2013. 19 p. This standard specifies the requirements for metal ball valves suitable for petroleum, petrochemical and industrial applications 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);
— threaded ends in sizes DN 8 through DN 50 ( NPS 1/4 through NPS 2).
Corresponding to the nominal pipe sizes in ASME B36.10M.