1、BRITISH STANDARD Flanges and their joints Circular rlanges ror 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 1092-412002 British Standards NO COPYING WITHOUT BSI PER
2、MISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1092-412002 National foreword This British Standard is the official English language version of The UKparticipation in its preparation was entrusted toTechnica1 Committee PSE/15, Flanges, which has the responsibility to: EN 1092-412002. - - aid enqu
3、irers 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. - A list of organizations
4、 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
5、Index”, or by using the “Search”faci1ity ofthe BSI Electronic Catalogue or ofBritish Stan dards 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 ofitself con
6、fer immunity from legal obligations. 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 Summary of pages This document comprises a fr
7、ont 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. I Date I Comments OBSI 23 July 2002 ISBN O 580 40132 4
8、 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE 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, ap
9、pareils de robinetterie, raccords et accessoires, dsignes PN - Partie 4: Brides en alliages daluminium Flansche und ihre Verbindungen - Runde Flansche fr Rohre, Armaturen, Formstcke und Zubehrteile, nach PN bezeichnet - Teil 4: Flansche aus Aluminiumlegierungen This European Standard was approved by
10、 CEN on 28 March 2002. CEN members are bound to comply with the CENKENELEC 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 standard
11、s 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 M
12、anagement 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 Unite
13、d Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1092-4:20
14、02 E EN 1092-4:2002 (E) Contents Page 1 2 3 4 4.1 4.2 4.3 4.4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 Range of DN Range of PN designations Types of flanges Designation of flanges Flange materials Repairs Bolting Gaskets Pressure temperature (p/T) ratings Dimensions Flange facings Spot facing and back
15、facing of flanges Tolerances 5.10 Marking 7 Figure 2 - Flange facings Figure 3 - Dimensions of PN 1 O flanges Figure 4 - Dimensions of PN 16 flanges Figure 5 - Dimensions of PN 25 flanges Figure 1 - Types of flanges 8 9 10 11 12 13 14 Figure 6 - Dimensions of PN 40 flanges Figure 7 - Dimensions of P
16、N 63 flanges for 15 Annex A (informative) Masses of flanges- 16 Annex ZA (informative) Clauses of this European Standard addressing essential requirements (ERS) or other provisions of EU Directives . 17 Table 1 - Synoptic table 8 9 9 10 11 12 Table 7 - Dimensions of PN 40 flanges 13 Table 8 - Dimens
17、ions of PN 63 flanges 14 Table 9 - Tolerances on dimensions 15 Table 10 - p/Tratings 15 Table A.l - Masses of flanges 16 Table ZA.l - Correspondence between this European Standard and Directive 97/23/EC 17 Table 2 - Flange facing dimensions Table 3 - Surface finish of flange jointing faces Table 4 -
18、 Dimensions of PN 10 flanges Table 5 - Dimensions of PN 16 flanges Table 6 - Dimensions of PN 25 flanges 2 EN 1092-4:2002 (E) 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 St
19、andard 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
20、 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;
21、 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 IS0 7005. Annex A is informati
22、ve. According to the CENKENELEC 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, N
23、orway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 EN 1092-4:2002 (E) 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 PN1 O to PN 63 (
24、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 PressureAemperature (plT) ratings. The flanges are intended to be used for piping as well as
25、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
26、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 symbol
27、s - Pressure, temperature, volume. EN 1333, Pipework components - Definition and selection of PN. EN 1514, Flanges and theirjoints - Dimensions of gaskets for PN-designated flanges. EN 1 51 5-1, Flanges and their joints - Bolting - Part I: Selection of bolting. EN 12392, Aluminium and aluminium allo
28、ys - Wrought products - Special requirements for products intended for the production of pressure equipment. EN IS0 887, Plain washers for metric bolts, screws and nuts for general purposes - General plan (IS0 887:ZOOO). EN IS0 4287, Geometrical product specifications (GPS) - Surface texture: Profil
29、e method - Terms, definitions and surface texture parameters (IS0 4287: 1997). EN IS0 6708, Pipework Components - Definition and selection of DN (nominal size) (IS0 6708: 1995). 4 EN 1092-4:2002 (E) 3 Terms and definitions For the purposes of this European Standard the following terms and definition
30、s apply. 3.1 DN see EN IS0 6708 3.2 PN see EN 1333 3.3 Ra, Rz see EN IS0 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
31、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 Tab
32、le 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
33、the following information: a) Description (flange); b) Number of this standard (EN 1092-4); c) Flange type number (1 1, 05 resp.); d) Flange facing type (e.g. C); e) DN (e.g. DN 300); f) g) PN (e.g. PN 40); h) Material (e.g. EN AW-5083-0). For type 11 flanges only, the neck diameter, A and the neck
34、thickness, S, (e.g. 324 x 4); 5 EN 1092-4:2002 (E) EXAMPLE 1 For a type 11 flange : Flange EN 1092-4 - 11 - C - DN 300 - 324 x 4 - PN 40 - EN AW-5083-0 EXAMPLE 2 For a type 05 flange : Flange EN 1092-4 - 05 - C - DN 300 - PN 40 - EN AW-5083-0 5 General requirements 5.1 Flange materials Flanges shall
35、 be manufactured from the material grades EN AW-5083 (AIMg4,5Mn0,7) -0 or EN AW-6061 (AIMglSiCu) -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
36、 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 a) For all service conditions in accordance with EN 1515-1 (bolthut): 56/51, 8.8/8, 25Ni-15Cr- Ti/25Ni-1 5Cr-Ti, A4-70/A4-70, A2-70/A2-70, 1
37、8Cr-SNi-Mo-AT+C/I 8Cr-SNi-Mo, 18Cr-9Ni- AT+C/I 8Cr-9Ni; b) For less severe service conditions e. g. water service or in case of oversized flanged joints, in accordance with EN 151 5-1 (bolthut): A4-50/A4-50, A2-50/A2-50, 18Cr-9Ni-Mo/l8Cr-9Ni-M0, 18Cr-9Ni/l8Cr-9Ni; Bolting materials shall be selected
38、 according to the following criteria: 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 e
39、xpected operating conditions. 5.3.3 The use of washers (EN IS0 887) is recommended. 5.4 Gaskets Gaskets shall be selected from the relevant part of EN 1514. NOTE calculation in accordance with ASME Code). If spiral wound gaskets are selected, than they should be low stress design (y = 5000, m = 3 fo
40、r 5.5 Pressure temperature (plr) ratings The pressure temperature ratings (p/T ratings) for the material grades in 5.1 are given in Table IO. 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 the following Ta
41、bles: Dimensions of flanges shall be in accordance with Figure 3 to Figure 7 and as appropriate PN 10 flanges: Table 4; 6 EN 1092-4:2002 (E) 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
42、 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 the neck shall be tapered at an angle of 14 O to 18 O. If S is ordered greater, the bore diameter shall be A-2x5. If the neck thickness
43、, S is ordered smaller than given in Tables 4 to 8, the inside diameter at 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 BI is standard for fla
44、nges 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 meas
45、urements are taken on the jointing faces. NOTE 2 For jointing face type BI, turning shall be carried out with a round-nosed tool in accordance with Table 3. Other jointing face finishes may be agreed. 5.8 Spot facing and back facing of flanges Any spot facing and back facing required shall not reduc
46、e 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 IS0 887 for the bolt size being fitted. When a flange is back faced, it is pe
47、rmissible 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 manufacturers name or trade-mark (e.g. xxx); b) Number of this standard (EN
48、1092-4); c) DN (e.g. DN 300); d) PN (e.g. PN 25); e) Neck thickness if not standard (e.g. 7,l); f) Material designation (e.g. EN AW-5083-0); g) Batch number or suitable quality control number traceable to the batch number when test certification is required (e.g. yyy). 7 EN 1092-4:2002 (E) EXAMPLE:
49、xxx - EN 1092-4 - DN 300 - PN 25 - 7,l - EN AW-5083-0 - yy The flanges shall be clearly and permanently marked around the rim. Table 1 - Synoptic table Type 05 Blank flange Type 11 Weld-neck flange Figure 1 - Types of flanges 8 EN 1092-4:2002 (E) Facing types BI 1) B2 I), C, D u NOTE Radius of Ra Rz machining mm IJm IJm Method of tool nose min. min. max. min. max. turning 2) 1 ,O 32 12,5 12,5 50 turning 2) 0,8 32 32 12,5 C X f2 - , N Type B Raised face Type c Tongue face Type D Groove face For types B and D, the tran
