本文件规定了圆钢和镍合金紧凑型法兰连接件及相关密封圈的详细制造要求，对于公称尺寸为DN 15（NPS？）至DN 1200（NPS 48）的公称尺寸，其指定压力和温度等级为CL 150（PN 20）至CL 1500（PN 260），对于公称尺寸为DN 15（NPS？）至DN 600（NPS 24）的公称尺寸，其指定压力和温度等级为CL 2500（PN 420）。 注:NPS的表示符合ASME B36。10M和ASME B36。1900万。 本文件适用于石油、石化和天然气行业工艺管道中使用的焊接颈法兰、盲板法兰、叶片垫片和垫片盲板（叶片盲板）、阀门/设备整体法兰、孔板垫片、异径螺纹法兰和刚性接口。 本文件适用于-196°C至+250°C的温度范围。 本文件不适用于外部压力。

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？) to DN 1200 (NPS 48), and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS？) to DN 600 (NPS 24). NOTE NPS is expressed in accordance with ASME B36.10M and ASME B36.19M. This document is applicable to welding neck flanges, blind flanges, paddle spacers and spacer blinds (paddle blanks), valve/equipment integral flanges, orifice spacers, reducing threaded flanges and rigid interfaces for use in process piping for the petroleum, petrochemical and natural gas industries. This document is applicable within a temperature range from？196 °C to +250 °C. This document is not applicable for external pressure.