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ISO 27509:2020

Petroleum and natural gas industries — Compact flanged connections with IX seal ring

Dec 7, 2020

General information

90.60     Mar 5, 2026

ISO

ISO/TC 67/SC 6

International Standard

23.040.60  

English   French  

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Published

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 27509:2012

WITHDRAWN
ISO 27509:2012/Cor 1:2013

NOW

PUBLISHED
ISO 27509:2020
90.60 Close of review
Mar 5, 2026

National adoptions

SRPS EN ISO 27509:2021  
ISS

Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2020)

60.60   Standard published

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