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EN ISO 27509:2020

(Main)

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

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

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.

Erdöl- und Erdgasindustrie - Kompakte Flanschverbindungen mit IX Dichtungsring (ISO 27509:2020)

Industries du pétrole et du gaz naturel - Raccordements à brides compactes avec bague d'étanchéité IX (ISO 27509:2020)

Industrija za predelavo nafte in zemeljskega plina - Kompaktni prirobnični konektorji s tesnilnim obročem IX (ISO 27509:2020)

General Information

Status
Published
Publication Date
15-Dec-2020
Withdrawal Date
29-Jun-2021
ICS
23.040.60 - Flanges, couplings and joints
Technical Committee
CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
Drafting Committee
CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
16-Dec-2020
Completion Date
16-Dec-2020
Ref Project
SIST EN ISO 27509:2021 - Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2020)

Relations

Replaces
EN 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)
Effective Date
23-Dec-2020
Replaces
EN ISO 27509:2012 - Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2012)
Effective Date
23-Dec-2020

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SLOVENSKI STANDARD
01-februar-2021
Nadomešča:
SIST EN ISO 27509:2014
SIST EN ISO 27509:2014/AC:2014
Industrija za predelavo nafte in zemeljskega plina - Kompaktni prirobnični
konektorji s tesnilnim obročem IX (ISO 27509:2020)
Petroleum and natural gas industries - Compact flanged connections with IX seal ring
(ISO 27509:2020)
Erdöl- und Erdgasindustrie - Kompakte Flanschverbindungen mit IX Dichtungsring (ISO
27509:2020)
Industries du pétrole et du gaz naturel - Raccordements à brides compactes avec bague
d'étanchéité IX (ISO 27509:2020)
Ta slovenski standard je istoveten z: EN ISO 27509:2020
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
75.180.01 Oprema za industrijo nafte in Equipment for petroleum and
zemeljskega plina na splošno natural gas industries in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 27509
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2020
EUROPÄISCHE NORM
ICS 23.040.60 Supersedes EN ISO 27509:2012
English Version
Petroleum and natural gas industries - Compact flanged
connections with IX seal ring (ISO 27509:2020)
Industries du pétrole et du gaz naturel - Erdöl- und Erdgasindustrie - Kompakte
Raccordements à brides compactes avec bague Flanschverbindungen mit IX Dichtungsring (ISO
d'étanchéité IX (ISO 27509:2020) 27509:2020)
This European Standard was approved by CEN on 12 February 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 27509:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 27509:2020) has been prepared by Technical Committee ISO/TC 67 "Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries" in
collaboration with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for
petroleum, petrochemical and natural gas industries” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2021, and conflicting national standards shall be
withdrawn at the latest by June 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 27509:2012.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 27509:2020 has been approved by CEN as EN ISO 27509:2020 without any modification.

INTERNATIONAL ISO
STANDARD 27509
Second edition
2020-12
Petroleum and natural gas
industries — Compact flanged
connections with IX seal ring
Industries du pétrole et du gaz naturel — Raccordements à brides
compactes avec bague d'étanchéité IX
Reference number
ISO 27509:2020(E)
©
ISO 2020
ISO 27509:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 27509:2020(E)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 2
4 Abbreviations and symbols . 2
4.1 Abbreviated terms . 2
4.2 Symbols . 3
5 Design . 5
5.1 General . 5
5.2 Design principles . 6
5.3 Assembly requirements . 8
5.4 Standard components . 8
5.5 Units of measurements . 9
5.6 Rounding . 9
5.7 Conformance with piping design codes . 9
5.8 Conformance with this document .10
6 Designation .10
6.1 Designation of flanges .10
6.2 Designation of seal rings .10
7 Materials .11
7.1 General .11
7.2 Flange materials.11
7.3 Bolting materials .11
7.4 Seal ring materials .12
8 Strength, pressure/temperature ratings and leak tightness .13
8.1 General .13
8.2 Pressure/temperature ratings .13
8.3 Pressure testing and leak tightness .14
9  Dimensions of flanges .14
9.1 General .14
9.2 Weld neck dimensions .15
9.3 Blind flange (BL) dimensions .23
9.4 Integral flange (IF) dimensions .26
9.5 Rigid interface dimensions .37
9.6 Dimensions of paddle blanks (PB) and paddle spacers (PS) .39
9.7 Handle and lifting lugs .41
9.8 Dimensions of orifice spacers (OS) .42
9.9 Dimensions of reducing threaded flanges .44
9.10 Auxiliary connections .45
9.11 Flange tolerances .45
9.12 Surface finish .47
10  Marking of flanges.48
10.1 Flanges other than integral flanges .
...

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