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).
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.