EN 1092-4

BRITISH STANDARD BS EN 1092-4:2002 Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 4: Aluminium alloy flanges The European Standard EN 1092-4:2002 has the status of a British Standard ICS 23.040.60 ����������� � ��� � ������������������� ��������� ��� ���������� ��� BS EN 1092-4:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 23 July 2002 © BSI 23 July 2002 ISBN 0 580 40132 4 National foreword This British Standard is the official English language version of EN 1092-4:2002. The UK participation in its preparation was entrusted to Technical Committee PSE/15, Flanges, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 1092-4 May 2002 ICS 23.040.60 English version Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 4: Aluminium alloy flanges Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie, raccords et accessoires, désignées PN - Partie 4: Brides en alliages d'aluminium Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke und Zubehörteile, nach PN bezeichnet - Teil 4: Flansche aus Aluminiumlegierungen This European Standard was approved by CEN on 28 March 2002. 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 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A LI S A T I O N EUR OP ÄIS C HES KOM ITEE FÜR NOR M UNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1092-4:2002 E EN 1092-4:2002 (E) 2 Contents page Foreword------------------------------------------------------------------------------------------------------ 3 1 Scope -------------------------------------------------------------------------------------------------- 4 2 Normative references----------------------------------------------------------------------------- 4 3 Terms and definitions ---------------------------------------------------------------------------- 5 4 Designations ---------------------------------------------------------------------------------------- 5 4.1 Range of DN 5 4.2 Range of PN designations 5 4.3 Types of flanges 5 4.4 Designation of flanges 5 5 General requirements ---------------------------------------------------------------------------- 6 5.1 Flange materials 6 5.2 Repairs 6 5.3 Bolting 6 5.4 Gaskets 6 5.5 Pressure temperature (p/T) ratings 6 5.6 Dimensions 6 5.7 Flange facings 7 5.8 Spot facing and back facing of flanges 7 5.9 Tolerances 7 5.10 Marking 7 Figure 1 - Types of flanges 8 Figure 2 - Flange facings 9 Figure 3 - Dimensions of PN 10 flanges 10 Figure 4 - Dimensions of PN 16 flanges 11 Figure 5 - Dimensions of PN 25 flanges 12 Figure 6 - Dimensions of PN 40 flanges 13 Figure 7 - Dimensions of PN 63 flanges 14 for 15 Annex A (informative) Masses of flanges---------------------------------------------------------16 Annex ZA (informative) Clauses of this European Standard addressing essential requirements (ER’s) or other provisions of EU Directives ---------------------17 Table 1 - Synoptic table 8 Table 2 - Flange facing dimensions 9 Table 3 - Surface finish of flange jointing faces 9 Table 4 - Dimensions of PN 10 flanges 10 Table 5 - Dimensions of PN 16 flanges 11 Table 6 - Dimensions of PN 25 flanges 12 Table 7 - Dimensions of PN 40 flanges 13 Table 8 - Dimensions of PN 63 flanges 14 Table 9 - Tolerances on dimensions 15 Table 10 - p/T ratings 15 Table A.1 - Masses of flanges 16 Table ZA.1 - Correspondence between this European Standard and Directive 97/23/EC 17 EN 1092-4:2002 (E) 3 Foreword This document EN 1092-4:2002 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 November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002. 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(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document. EN 1092 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. The mating dimensions of the flanges of this standard are compatible with those flanges of other materials in accordance with the other parts of EN 1092 and with those flanges of ISO 7005. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 1092-4:2002 (E) 4 1 Scope This European Standard specifies requirements for PN designated circular flanges for pipes, valves, fittings and accessories made from aluminium alloy in the range of DN 15 to DN 600 and PN10 to PN 63 (see Table 1). This European Standard specifies the types of flanges and their facings, dimensions and tolerances, bolt sizes, surface finish of jointing faces, marking and materials together with associated pressure/temperature (p/T) ratings. The flanges are intended to be used for piping as well as for pressure vessels. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or provisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 764, Pressure equipment - Terminology and symbols - Pressure, temperature, volume. EN 1333, Pipework components - Definition and selection of PN. EN 1514, Flanges and their joints - Dimensions of gaskets for PN-designated flanges. EN 1515-1, Flanges and their joints - Bolting - Part 1: Selection of bolting. EN 12392, Aluminium and aluminium alloys - Wrought products - Special requirements for products intended for the production of pressure equipment. EN ISO 887, Plain washers for metric bolts, screws and nuts for general purposes - General plan (ISO 887:2000). EN ISO 4287, Geometrical product specifications (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters (ISO 4287:1997). EN ISO 6708, Pipework Components - Definition and selection of DN (nominal size) (ISO 6708:1995). EN 1092-4:2002 (E) 5 3 Terms and definitions For the purposes of this European Standard the following terms and definitions apply. 3.1 DN see EN ISO 6708 3.2 PN see EN 1333 3.3 Ra, Rz see EN ISO 4287 3.4 maximum allowable pressure, PS PS means the maximum pressure for which the equipment is designed, as specified by the equipment manufacturer (See also EN 764, where it is defined as allowable pressure pS). 3.5 maximum allowable temperature, TS TS means the maximum temperature for which the equipment is designed, as specified by the equipment manufacturer (See also EN 764, where it is defined as allowable temperature tS). 4 Designations 4.1 Range of DN The range of DN applicable to each PN shall be as given in Table 1. 4.2 Range of PN designations The range of PN designations shall be as given in Table 1. 4.3 Types of flanges Figure 1 illustrates flanges identified according to type: a) Type 05 Blank flange; b) Type 11 Weld-neck flange. 4.4 Designation of flanges The designation of the flanges shall contain the following information: a) Description (flange); b) Number of this standard (EN 1092-4); c) Flange type number (11, 05 resp.); d) Flange facing type (e.g. C); e) DN (e.g. DN 300); f) For type 11 flanges only, the neck diameter, A and the neck thickness, S, (e.g. 324 x 4); g) PN (e.g. PN 40); h) Material (e.g. EN AW-5083-O). EN 1092-4:2002 (E) 6 EXAMPLE 1 For a type 11 flange : Flange EN 1092-4 - 11 - C - DN 300 - 324 x 4 - PN 40 - EN AW-5083-O EXAMPLE 2 For a type 05 flange : Flange EN 1092-4 - 05 - C - DN 300 - PN 40 - EN AW-5083-O 5 General requirements 5.1 Flange materials Flanges shall be manufactured from the material grades EN AW-5083 (AlMg4,5Mn0,7) -O or EN AW-6061 (AlMg1SiCu) -T6 as specified in EN 12392. Other materials may be used. For the p/T ratings see 5.5. Weld-neck flanges shall be forged or made from extruded bars; blank flanges shall be forged or made from plate. 5.2 Repairs Repair welding of the flanges is not permitted. 5.3 Bolting 5.3.1 The bolting shall be chosen according to the pressure, temperature and gasket. 5.3.2 Bolting materials shall be selected according to the following criteria: a) For all service conditions in accordance with EN 1515-1 (bolt/nut): 5.6/5, 8.8/8, 25Ni-15Cr- Ti/25Ni-15Cr-Ti, A4-70/A4-70, A2-70/A2-70, 18Cr-9Ni-Mo-AT+C/18Cr-9Ni-Mo, 18Cr-9Ni- AT+C/18Cr-9Ni; b) For less severe service conditions e. g. water service or in case of oversized flanged joints, in accordance with EN 1515-1 (bolt/nut): A4-50/A4-50, A2-50/A2-50, 18Cr-9Ni-Mo/18Cr-9Ni-Mo, 18Cr-9Ni/18Cr-9Ni; The choice of this bolting shall be based on either special experience or on recalculations. c) Where bolting other than specified in EN 1515-1 is required, this shall be chosen according to the parameters above so that the flanged joint remains tight under the expected operating conditions. 5.3.3 The use of washers (EN ISO 887) is recommended. 5.4 Gaskets Gaskets shall be selected from the relevant part of EN 1514. NOTE If spiral wound gaskets are selected, than they should be low stress design (y = 5000, m = 3 for calculation in accordance with ASME Code). 5.5 Pressure temperature (p/T) ratings The pressure temperature ratings (p/T ratings) for the material grades in 5.1 are given in Table 10. For other aluminium alloys, which may be used, the p/T ratings shall be established according to the service conditions. 5.6 Dimensions 5.6.1 Dimensions of flanges shall be in accordance with Figure 3 to Figure 7 and as appropriate the following Tables: • PN 10 flanges: Table 4; EN 1092-4:2002 (E) 7 • PN 16 flanges: Table 5; • PN 25 flanges: Table 6; • PN 40 flanges: Table 7; • PN 63 flanges: Table 8. NOTE 1 Approximate masses of flanges are given in annex A. NOTE 2 Figures 3 to 7 are identical. They are repeated for better handling of the standard. 5.6.2 Bolt holes shall be equally spaced on the pitch circle diameter. 5.6.3 If the neck thickness, S is ordered smaller than given in Tables 4 to 8, the inside diameter at the neck shall be tapered at an angle of 14 ° to 18 °. If S is ordered greater, the bore diameter shall be A S- ·2 . 5.7 Flange facings 5.7.1 Types of facings The types of flange facings shall be as given in Figure 2, and their dimensions shall be as given in Table 2. If not stated in the purchase order, flange facing B1 is standard for flanges up to PN 40, flange facing B2 is standard for PN 63 flanges. 5.7.2 Jointing face finish All flange jointing faces shall be machine finished and, when compared by visual or tactile means with reference specimens, shall be in accordance with Table 3. NOTE 1 It is not intended that instrument measurements are taken on the jointing faces. NOTE 2 Other jointing face finishes may be agreed. For jointing face type B1, turning shall be carried out with a round-nosed tool in accordance with Table 3. 5.8 Spot facing and back facing of flanges Any spot facing and back facing required shall not reduce the flange thickness to less than the thickness specified. When spot facing is used, the diameter shall be large enough to accommodate the outside diameter of the equivalent normal series of washers in accordance with EN ISO 887 for the bolt size being fitted. When a flange is back faced, it is permissible for the fillet radius to be reduced but it shall not be eliminated entirely. 5.9 Tolerances Tolerances on dimensions shall be as specified in Table 9. 5.10 Marking All flanges shall be marked as follows: a) Flange manufacturer's name or trade-mark (e.g. xxx); b) Number of this standard (EN 1092-4); c) DN (e.g. DN 300); d) PN (e.g. PN 25); e) Neck thickness if not standard (e.g. 7,1); f) Material designation (e.g. EN AW-5083-O); g) Batch number or suitable quality control number traceable to the batch number when test certification is required (e.g. yyy). EN 1092-4:2002 (E) 8 EXAMPLE: xxx - EN 1092-4 - DN 300 - PN 25 - 7,1 - EN AW-5083-O - yyy The flanges shall be clearly and permanently marked around the rim. Table 1 - Synoptic table Type PN DN 15 25 40 50 80 100 150 200 250 300 400 500 600 10 Use PN 40 Use PN 16 x x x x x x 05 16 Use PN 40 x x x x x x x x x and 25 Use PN 40 x x x x x x 11 40 x x x x x x x x x x x - - 63 x x x x x x x x x x - - - Type 05 Type 11 Blank flange Weld-neck flange Figure 1 - Types of flanges EN 1092-4:2002 (E) 9 Type B Type C Type D Raised face Tongue face Groove face NOTE For types B and D, the transition from the edge of the raised face (d1) to the flange face is either by radius or chamfer. Figure 2 - Flange facings Table 2 - Flange facing dimensions Dimensions in millimetres DN d1 PN10 PN16 PN25 PN40 PN63 f1 f2 f3 w x y z 15 45 2 4,5 4 29 39 40 28 25 68 2 4,5 4 43 57 58 42 40 88 2 4,5 4 61 75 76 60 50 102 2 4,5 4 73 87 88 72 80 Use PN 63 138 2 4,5 4 106 120 121 105 100 Use 156 Use 156 162 2 5 4,5 129 149 150 128 150 PN 16 211 PN 40 211 218 2 5 4,5 183 203 204 182 200 266 266 274 284 285 2 5 4,5 239 259 260 238 250 319 319 330 345 345 2 5 4,5 292 312 313 291 300 370 370 389 409 410 2 5 4,5 343 363 364 342 400 480 480 503 535 - 2 5,5 5 447 473 474 446 500 582 609 609 - - 2 5,5 5 549 575 576 548 600 682 720 720 - - 2 5,5 5 649 675 676 648 Table 3 - Surface finish of flange jointing faces Facing types Method of machining Radius of tool nose mm Ra µm Rz µm min. min. max. min. max. B1 1) turning 2) 1,0 3,2 12,5 12,5 50 B2 1), C, D turning 2) - 0,8 3,2 3,2 12,5 1) B1 and B2 are raised face (type B) with different surface roughness. 2) The term "turning" includes any method of machine operation producing either serrated concentric or serrated spiral grooves. EN 1092-4:2002 (E) 10 This diagram illustrates the arrangement but not Type 05 Type 11 necessarily the correct number of bolt holes. NOTE 1 Dimension N is measured at the intersection of the projections of the hub draft angle and the back face of the flange. NOTE 2 For facing dimensions see Table 5. Figure 3 - Dimensions of PN 10 flanges Table 4 - Dimensions of PN 10 flanges Dimensions in millimetres Mating dimensions Flange Neck Bolting thick- Length Thick- Corner DN D K L ness Diameter ness radii Number Size C H1 H2 N A S R up to 50 Use PN 40 dimensions 80 to 150 Use PN 16 dimensions 200 340 295 22 8 M20 40 68 6 235 219 3 10 250 395 350 22 12 M20 45 79 8 292 273 4 12 300 445 400 22 12 M20 50 84 8 344 324 4 12 400 565 515 26 16 M24 65 103 8 440 406 4 12 500 670 620 26 20 M24 75 114 8 542 508 4 12 600 780 725 30 20 M27 90 134 10 642 610 5 12 EN 1092-4:2002 (E) 11 This diagram illustrates the arrangement but not Type 05 Type 11 necessarily the correct number of bolt holes. NOTE 1 Dimension N is measured at the intersection of the projections of the hub draft angle and the back face of the flange. NOTE 2 For facing dimensions see Table 5. Figure 4 - Dimensions of PN 16 flanges Table 5 - Dimensions of PN 16 flanges Dimensions in millimetres Mating dimensions Flange Neck Bolting thick- Length Thick- Corner DN D K L ness Diameter ness radii Number Size C H1 H2 N A S R up to 50 Use PN 40 dimensions 80 200 160 18 8 M16 30 55 5 105 89 2,5 8 100 220 180 18 8 M16 30 56 6 131 114 3 8 150 285 240 22 8 M20 40 67 6 184 168 3 10 200 340 295 22 12 M20 45 73 6 235 219 3 10 250 405 355 26 12 M24 45 81 8 292 273 4 12 300 460 410 26 12 M24 50 92 8 344 324 4 12 400 580 525 30 16 M27 65 112 10 445 406 5 12 500 715 650 33 20 M30 80 130 10 548 508 6 12 600 840 770 36 20 M33 90 143 12 652 610 8 12 EN 1092-4:2002 (E) 12 This diagram illustrates the arrangement but not Type 05 Type 11 necessarily the correct number of bolt holes. NOTE 1 Dimension N is measured at the intersection of the projections of the hub draft angle and the back face of the flange. NOTE 2 For facing dimensi