This International Standard 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 in accordance with ASME B36.10M and ASME B36.19M.This International Standard is applicable to welding neck flanges, blind flanges, paddle spacers and spacer blinds (paddle blanks), valve/equipment integral flanges, orifice spacers, reducing threaded
EN ISO 27509:2012 Referenced Document
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2020EN ISO 27509:2020 Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2020)
2013EN ISO 27509:2012/AC:2013 Petroleum and natural gas industries - Compact flanged connections with IX seal ring - Technical Corrigendum 1 (ISO 27509:2012/Cor 1:2013)
2012EN ISO 27509:2012 Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2012)