本文件规定了圆钢和镍合金的详细制造要求 适用于指定压力和温度的紧凑型法兰连接和相关密封圈 公称尺寸从DN 15（NPS½）到 DN 1200（NPS 48），对于公称尺寸为DN 15（NPS½）至DN 600（NPS 24）的CL 2500（PN 420）。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies detailed manufacturing requirements for circular steel and nickel alloy compact flanged connections and associated seal rings, for designated pressures and temperatures in class designations CL 150 (PN 20) to CL 1500 (PN 260) for nominal sizes from DN 15 (NPS ½) to DN 1200 (NPS 48), and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS ½) to DN 600 (NPS 24).All current amendments available at time of purchase are included with the purchase of this document.