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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 1/2) to DN 1200 (NPS 48), and for CL 2500 (PN 420) for nominal sizes from DN 15 (NPS 1/2) to DN 600 (NPS 24). NPS is in accordance with ASME B36.10M and ASME B36.19M. This International Standard covers 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 International Standard is applicable within a temperature range from -196 °C to +250 °C. For Germany Working Committee NA 109-00-01 AA "Materialien, Ausrüstungen und Offshore-Bauwerke für die Erdöl-, petrochemische und Erdgasindustrie - Spiegelausschuss zu CEN/TC 12" ("Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries - Mirror Committee for CEN/TC 12") of the Petroleum and Natural Gas Industries Standards Committee (NÖG) at DIN, the German Institute for Standardization e. V., participated.
This document has been replaced by: DIN EN ISO 27509:2013-10 .