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ÖNORM EN ISO 27509:2013-04

Заменен
Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2012)
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 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).
ICS
23.040.60 Flanges, couplings and joints / Фланцы, муфты и соединения