Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

This European Standard for a single series of flanges specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000.
This European Standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange jointing face surface finish, marking, materials, pressure/ temperature ratings and approximate flange masses.
For the purpose of this European Standard, "flanges" include also lapped ends and collars.
This European Standard applies to flanges manufactured in accordance with the methods described in Table 1.
Non-gasketed pipe joints are outside the scope of this European Standard.

Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke und Zubehörteile, nach PN bezeichnet - Teil 1: Stahlflansche

Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie, raccords et accessoires, désignées PN - Partie 1: Brides en acier

La présente Norme européenne pour un seul système de brides spécifie les prescriptions pour les brides circulaires en acier avec les désignations PN 2,5 à PN 400 et les diamètres nominaux DN 10 à DN 4000.
La présente Norme européenne définit les types de brides et leurs portées de joint, les dimensions, les tolérances, les filetages, les dimensions des boulons, les états de surface des faces de joints des brides, le marquage, les matériaux, les relations pression/température et les masses approximatives des brides.
Pour les besoins de la présente Norme européenne, le terme « brides » inclut aussi les collets et les extrémités embouties à souder.
La présente Norme européenne s'applique aux brides fabriquées selon les méthodes décrites au
Tableau 1.
Les assemblages de tuyauteries sans joints se trouvent hors du domaine d'application de la présente Norme européenne.

Prirobnice in prirobnični spoji - Okrogle prirobnice za cevi, ventile, fitinge in pribor z oznako PN - 1. del: Jeklene prirobnice

Ta osnutek evropskega standarda za posamezni niz prirobnic določa zahteve za okrogle jeklene prirobnice z oznakami PN od PN 2,5 do PN 400 in nominalno velikostjo od DN 10 do DN 4000.
Ta osnutek evropskega standarda določa vrste prirobnic in njihove prevleke, mere, tolerance, navoje, velikosti vijakov, površinski premaz stične ploskve prirobnice, označevanje, materiale, vrednosti tlaka/temperature in približne mase prirobnic.
Za namene tega osnutka evropskega standarda »prirobnice« vključujejo tudi preklopljene konce in obroče.
Ta osnutek evropskega standarda velja za prirobnice, proizvedene v skladu z metodami, opisanimi v preglednici 1.
Spoji cevi brez tesnil ne spadajo v področje uporabe tega osnutka evropskega standarda.

General Information

Status
Published
Publication Date
10-Apr-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
11-Apr-2018
Completion Date
11-Apr-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke und Zubehörteile, nach PN bezeichnet - Teil 1: StahlflanscheBrides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie, raccords et accessoires, désignées PN - Partie 1 : Brides en acierFlanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and jointsICS:Ta slovenski standard je istoveten z:EN 1092-1:2018SIST EN 1092-1:2018en,fr,de01-julij-2018SIST EN 1092-1:2018SLOVENSKI

STANDARDSIST EN 1092-1:2007+A1:2013/AC:2014SIST EN 1092-1:2007+A1:20131DGRPHãþD
SIST EN 1092-1:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1092-1
April
t r s z ICS
t uä r v rä x r Supersedes EN
s r { tæ sã t r r y ªA sã t r s uEnglish Version

Flanges and their joints æ Circular flanges for pipesá valvesá fittings and accessoriesá PN designated æ Part

sã Steel flanges Brides et leurs assemblages æ Brides circulaires pour tubesá appareils de robinetterieá raccords et accessoiresá désignées PN æ Partie

sã Brides en acier

Flansche und ihre Verbindungen æ Runde Flansche für Rohreá Armaturená Formstücke und Zubehörteileá nach PN bezeichnet æ Teil

sã Stahlflansche This European Standard was approved by CEN on
t y November
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s r { tæ sã t r s z ESIST EN 1092-1:2018

EN 1092-1:2018 (E) 2 Contents Page European foreword ....................................................................................................................................................... 5 Introduction .................................................................................................................................................................... 6 1 Scope .................................................................................................................................................................... 7 2 Normative references .................................................................................................................................... 7 3 Terms and definitions ................................................................................................................................ 10 4 Designation..................................................................................................................................................... 11 4.1 General ............................................................................................................................................................. 11 4.2 Standard designation .................................................................................................................................. 11 5 General requirements ................................................................................................................................ 13 5.1 Materials .......................................................................................................................................................... 13 5.1.1 General ............................................................................................................................................................. 13 5.1.2 Methods of manufacture related to base material ........................................................................... 13 5.2 Repairs by welding ...................................................................................................................................... 14 5.3 Bolting .............................................................................................................................................................. 14 5.4 Gaskets ............................................................................................................................................................. 15 5.5 Determination of p/T ratings .................................................................................................................. 15 5.6 Dimensions ..................................................................................................................................................... 15 5.6.1 Flanges and collars ...................................................................................................................................... 15 5.6.2 Hubs .................................................................................................................................................................. 16 5.6.3 Threaded flanges .......................................................................................................................................... 16 5.6.4 Bolt holes ......................................................................................................................................................... 16 5.6.5 Lapped joints ................................................................................................................................................. 16 5.6.6 Collar types ..................................................................................................................................................... 16 5.7 Facings .............................................................................................................................................................. 16 5.7.1 Types of facings ............................................................................................................................................. 16 5.7.2 Jointing face finish ....................................................................................................................................... 17 5.8 Surface finish of flanges and collars ...................................................................................................... 17 5.8.1 Surface finish ................................................................................................................................................. 17 5.8.2 Spot facing or back facing of flanges ..................................................................................................... 18 5.9 Tolerances ...................................................................................................................................................... 18 5.10 Marking ............................................................................................................................................................ 19 5.10.1 General marking requirements .............................................................................................................. 19 5.10.2 Stamping .......................................................................................................................................................... 19 5.10.3 Declaration of compliance ........................................................................................................................ 19 5.11 Welding ............................................................................................................................................................ 20 5.12 Inspection and testing ................................................................................................................................ 20 5.12.1 Inspection and testing of fusion welded joints .................................................................................. 20 5.12.2 Inspection and testing of bent and electric welded flanges or collars from formed bars, sectional steel or band material .................................................................................................. 21 5.12.3 Inspection and testing of formed parts manufactured from base material other than forgings ............................................................................................................................................................ 22 5.12.4 Inspection and testing of close die flanges.......................................................................................... 23 5.12.5 Inspection and testing of other materials ........................................................................................... 24 5.13 Certificates ...................................................................................................................................................... 24 SIST EN 1092-1:2018

EN 1092-1:2018 (E) 3 Annex A (normative)

Wall thickness and end preparation for flanges type 11, 34, 35, 36, 37 and pipe nominal thicknesses for the use with type 01 flanges .................................................. 83 A.1 Weld-end preparation for flanges types 11 and 34 .......................................................................... 83 A.2 Weld-end preparation for type 35 .......................................................................................................... 85 A.3 Weld end preparation for types 36 and 37 ......................................................................................... 87 Annex B (informative)

Material groups ............................................................................................................. 89 Annex C (informative)

Approximate masses of flanges and collars ........................................................ 91 Annex D (informative)

Additional materials ................................................................................................ 101 Annex E (normative)

Basis of flange calculation ......................................................................................... 103 E.1 General .......................................................................................................................................................... 103 E.2 Calculation method ................................................................................................................................... 103 E.3 Basic rules for calculation of flange connection ............................................................................. 103 E.3.1 General .......................................................................................................................................................... 103 E.3.2 Flanges ........................................................................................................................................................... 104 E.3.3 Pipes ............................................................................................................................................................... 104 E.3.4 Bolting/Tightening.................................................................................................................................... 105 E.3.5 Gasket ............................................................................................................................................................ 105 Annex F (normative)

Determination of p/T ratings ................................................................................... 107 F.1 General .......................................................................................................................................................... 107 F.1.1 Reference temperature (RT) ................................................................................................................. 107 F.1.2 Application limits and formulae .......................................................................................................... 107 F.2 Symbols, descriptions and units........................................................................................................... 107 F.2.1 General .......................................................................................................................................................... 107 F.2.2 p/T ratings for materials with time independent nominal design stress ............................. 108 F.2.3 p/T ratings for materials with time dependent nominal design stress ................................. 108 F.2.4 Reference value for thickness (vR) ...................................................................................................... 108 F.2.5 Nominal design stresses and safety factors for mean creep rupture strength ................... 108 F.2.6 Flanges made from steel castings ........................................................................................................ 109 F.2.7 Rounding of maximum allowable pressure at temperature ...................................................... 109 Annex G (normative)

p/T ratings for a selection of EN materials ......................................................... 110 G.1 General .......................................................................................................................................................... 110 G.1.1 p/T ratings ................................................................................................................................................... 110 G.1.2 Basics of determination of p/T ratings (see Annex F) .................................................................. 110 G.1.3 Application limits for creep range ....................................................................................................... 110 G.2 Non-austenitic steels ................................................................................................................................ 111 G.2.1 General .......................................................................................................................................................... 111 G.2.2 List of materials .......................................................................................................................................... 112 SIST EN 1092-1:2018

EN 1092-1:2018 (E) 4 G.2.3 p/T ratings .................................................................................................................................................... 113 G.3 Austenitic and austenitic-ferritic steels ............................................................................................. 125 G.3.1 General ........................................................................................................................................................... 125 G.3.2 List of materials .......................................................................................................................................... 125 G.3.3 p/T ratings .................................................................................................................................................... 126 Annex H (informative)

Rings for flanges with groove ................................................................................ 138 Annex I (informative)

Flanges with fixed inner diameter ........................................................................ 139 I.1 General ........................................................................................................................................................... 139 I.2 Scope ............................................................................................................................................................... 139 Annex J (informative)

Mating dimensions for flanges with higher DN ................................................ 144 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of EU Directive 2014/68/EU Pressure Equipment Directive aimed to be covered ..................................................................................................................................................... 146 Bibliography ............................................................................................................................................................... 147

SIST EN 1092-1:2018

EN 1092-1:2018 (E) 5 European foreword This document (EN 1092-1:2018) has been prepared by Technical Committee CEN/TC 74 “Flanges and their joints”, the secretariat of which is held by DIN. 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 October 2018 and conflicting national standards shall be withdrawn at the latest by October 2018. 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 1092-1:2007+A1:2013. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2014/68/EU. For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. The major changes in comparison with EN 1092-1:2007+A1:2013 include: a) standard references were updated; b) several changes were made in some synoptic tables; c) changes were implemented in thicknesses for types 36 and 37; d) flanges Type 5 for PN 160 to PN 400 were implemented. EN 1092, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated, consists of the following four parts: — Part 1: Steel flanges; — Part 2: Cast iron flanges; — Part 3: Copper alloy flanges; — Part 4: Aluminium alloy flanges. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1092-1:2018

EN 1092-1:2018 (E) 6 Introduction When the Technical Committee CEN/TC 74 started its work of producing this European Standard, it took as its basis the International Standard ISO 7005-1, Steel flanges. In taking this decision, CEN/TC 74, agreed that this standard would differ significantly from the ISO standard in respect of the following: a) whereas ISO 7005-1 included in its scope both the original DIN based flanges and also the original ANSI/ASME based flanges, EN 1092-1 contains only the PN based flanges. CEN/TC 74 has produced a separate series of standards, EN 1759-1, EN 1759-3 and EN 1759-4, dealing with the ANSI/ASME based flanges in their original Class designations; b) the opportunity was taken to revise some of the technical requirements applicable to the DIN origin flanges. Consequently, while the mating dimensions, the flange and facing types and designations are compatible with those given in ISO 7005-1, it is important to take account of the following differences which exist in EN 1092-1: 1) the p/T ratings of this standard have been reduced in many cases by either limiting the lower temperature ratings which can no longer exceed the PN value, or by increasing the rate at which allowable pressures shall reduce with increase in temperature; 2) in addition to the range of PN 2,5 to PN 40 DIN origin flanges contained in the ISO standard, EN 1092-1 also includes flanges up to PN 400. SIST EN 1092-1:2018

EN 1092-1:2018 (E) 7 1 Scope This European Standard for a single series of flanges specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000. This European Standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange jointing face surface finish, marking, materials, pressure/ temperature ratings and approximate flange masses. For the purpose of this European Standard, “flanges” include also lapped ends and collars. This European Standard applies to flanges manufactured in accordance with the methods described in Table 1. Non-gasketed pipe joints are outside the scope of this European Standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1514-1:1997, Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 1: Non-metallic flat gaskets with or without inserts EN 1514-2:2014, Flanges and their joints - Gaskets for PN-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges EN 1515-2:2001, Flanges and their joints - Bolting - Part 2: Classification of bolt materials for steel flanges, PN designated EN 1515-4:2009, Flanges and their joints - Bolting - Part 4: Selection of bolting for equipment subject to the Pressure Equipment Directive 97/23/EC EN 1591-1:2013, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation EN 1708-1:2010, Welding - Basic welded joint details in steel - Part 1: Pressurized components EN 10021:2006, General technical delivery conditions for steel products EN 10028-2:2017, Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties EN 10028-3:2017, Flat products made of steels for pressure purposes - Part 3: Weldable fine grain steels, normalized EN 10028-4:2017, Flat products made of steels for pressure purposes - Part 4: Nickel alloy steels with specified low temperature properties EN 10028-7:2016, Flat products made of steels for pressure purposes - Part 7: Stainless steels EN 10160:1999, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection method) EN 10204:2004, Metallic products - Types of inspection documents SIST EN 1092-1:2018

EN 1092-1:2018 (E) 8 EN 10213:2007+A1:2016, Steel castings for pressure purposes EN 10216-2:2013, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties EN 10216-3:2013, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 3: Alloy fine grain steel tubes EN 10216-4:2013, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Non-alloy and alloy steel tubes with specified low temperature properties EN 10216-5:2013, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless steel tubes EN 10217-2:2002, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties EN 10217-3:2002, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 3: Alloy fine grain steel tubes EN 10217-7:2014, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes EN 10220:2002, Seamless and welded steel tubes - Dimensions and masses per unit length EN 10222-2:2017, Steel forgings for pressure purposes - Part 2: Ferritic and martensitic steels with specified elevated temperature properties EN 10222-3:2017, Steel forgings for pressure purposes - Part 3: Nickel steels with specified low temperature properties EN 10222-4:2017, Steel forgings for pressure purposes - Part 4: Weldable fine grain steels with high proof strength EN 10222-5:2017, Steel forgings for pressure purposes - Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels EN 10226-3:2005, Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by means of limit gauges EN 10272:2016, Stainless steel bars for pressure purposes EN 10273:2016, Hot rolled weldable steel bars for pressure purposes with specified elevated temperature properties EN 12516-1:2014, Industrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells EN 13445-3:2014, Unfired pressure vessels - Part 3: Design EN 13480-3:2017, Metallic industrial piping - Part 3: Design and calculation EN 22768-1:1993, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1) SIST EN 1092-1:2018

EN 1092-1:2018 (E) 9 EN ISO 148-1:2016, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1:2016) EN ISO 887:2000, Plain washers for metric bolts, screws and nuts for general purposes - General plan (ISO 887:2000) EN ISO 3452-1:2013, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-1:2013) EN ISO 4014:2011, Hexagon head bolts - Product grades A and B (ISO 4014:2011) EN ISO 4287:1998, Geometrical product specifications (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters (ISO 4287:1997) EN ISO 5817:2014, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) - Quality levels for imperfections (ISO 5817:2014) EN ISO 6892-1:2016, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1:2016) EN ISO 9606-1:2017, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1:2012, including Cor 1:2012 and Cor 2:2013) EN ISO 9692-2:1998, Welding and allied processes - Joint preparation - Part 2: Submerged arc welding of steels (ISO 9692-2:1998) EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712:2012) EN ISO 10675-1:2016, Non-destructive testing of welds - Acceptance levels for radiographic testing - Part 1: Steel, nickel, titanium and their alloys (ISO 10675-1:2016) EN ISO 11666:2010, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO 11666:2010) EN ISO 14732:2013, Welding personnel - Qualification testing of welding operators and weld setters for mechanized and automatic welding of metallic materials (ISO 14732:2013) EN ISO 15614-1:2017, Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004) EN ISO 15614-13:2012, Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 13: Upset (resistance butt) and flash welding (ISO 15614-13:2012) EN ISO 17636-1:2013, Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray techniques with film (ISO 17636-1:2013) EN ISO 17636-2:2013, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray techniques with digital detectors (ISO 17636-2:2013) EN ISO 17637:2016, Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO 17637:2016) EN ISO 17638:2016, Non-destructive testing of welds - Magnetic particle testing (ISO 17638:2016) SIST EN 1092-1:2018

EN 1092-1:2018 (E) 10 EN ISO 17640:2010, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2010) EN ISO 23277:2015, Non-destructive testing of welds - Penetrant testing of welds - Acceptance levels (ISO 23277:2006) EN ISO 23278:2015, Non-destructive testing of welds - Magnetic particle testing of welds - Acceptance levels (ISO 23278:2006) ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation ISO 4200:1991, Plain end steel tubes, welded and seamless - General tables of dimensions and masses per unit length 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 DN alphanumeric designation of size for components of a pipework system, which is used for reference purposes and which comprises the letters DN followed by a dimensionless whole number that is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections Note 1 to entry: The number following the letters DN does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard. Note 2 to entry: In those standards which use the DN designation system, any relationship between DN and component dimensions sho

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