标准编号：ISO 27509:2020
中文名称：石油和天然气工业 带IX密封环的紧凑法兰连接
英文名称：Petroleum and natural gas industries — Compact flanged connections with IX seal ring
发布日期：2020-12
标准范围
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.
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