ISO 27509:2020 pdf download.Petroleum and natural gas industries — Compact flanged connections with IX seal ring
1 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications
ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters
ISO 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and procedures for the assessment of surface texture
ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements
ISO 5167-2:2003, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 2: Orifice plates
ISO 14313, Petroleum and natural gas industries — Pipeline transportation systems — Pipeline valves
ISO 80000-1:2009, Quantities and units — Part 1: General
EN 1591-4, Flanges and their joints — Part 4: Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems
EN 1779, Non-destructive testing — Leak testing — Criteria for method and technique selection
ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
ASME B16.34, Valves — Flanged, Threaded and Welding End
ASME B1.20.1, Pipe Threads, General Purpose (Inch)
ASME B31.3:2018, Process Piping
ASTM B568, Standard Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
ASTM B571, Standard Practice for Qualitative Adhesion Testing of Metallic Coatings
ASME VIII Div. 2: Boiler and Pressure Vessel Code — Alternative Rules
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
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ISO 27509:2020 pdf download
