1、DEUTSCHE NORM June 1997 Circular flanges for pipes, valves, fittings and accessories, PN designated Part 2: Cast iron flanges Enalish version of DIN EN 1092-2 ICs 23.040.60 Descriptors: Pipework, flanges, cast iron. Supersedes DIN 2530: 1976-02, DIN 2531 : 1976-02, DIN 2532: 1976-02, DIN 2533: 1976-
2、02, DIN 2534: 1976-02, DIN 2535: 1976-02, DIN 28604: 1990-01, DIN 28605: 1990-01, DIN 28606: 1990-01, Flansche und ihre Verbindungen - Runde Flansche fr Rohre, Armaturen, Formstcke und Zubehrteile, nach PN bezeichnet - Teil 2: Gueisenflansche and DIN 28607: 1990-01, and parts of DIN 2500: 1966-08, D
3、IN 2501-1 : 1972-02, and DIN 2526:1975-03. European Standard EN 1092-2: 1997 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by CEN/TC 74. The responsible German body involved in its preparation was the Normenausschu Rohre, R
4、ohrverbindungen und Rohrleitungen (Pipes, Pipe Joints and Pipelines Standards Committee), Technical Committee Flansche und ihre Verbindungen. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard IS0 13 DIN 28500 IS
5、0 185 DIN 1691 IS0 468 DIN 4763 IS0 1083 DIN 1693-1 and DIN 1693-2 IS0 2531 DIN EN 545 IS0 5458 DIN IS0 5458 IS0 6708 DIN EN IS0 6708 Amendments The standards listed in the Superseding note have been superseded by the specifications of EN 1092-2. Previous editions DIN 2500: 1928-10, 1949-09, 1966-08
6、; DIN 2501: 1926-07, 1927-10, 1928-01, 1942-11, 1949-06; DIN 2501-1: 1970-11, 1972-02; DIN 2502: 1926-07, 1928-01, 1931-04, 1942-11, 1949-06; DIN 2503: 1926-07, 1927-10, 1942-11, 1949-06; DIN 2504: 1928-04, 1942-1 1, 1949-06; DIN 2508: 1926-07; DIN 2526: 1963-1 1, 1975-03; DIN 2530: 1926-07, 1943-05
7、, 1949-12, 1967-06, 1976-02; DIN 2531: 1926-01, 1927-10, 1943-05, 1949-12, 1967-06, 1976-02; DIN 2532: 1926-07, 1928-01, 1931-04, 1934-09, 1935-02, 1943-05, 1949-12, 1967-06, 1976-02; DIN 2533: 1926-07, 1943-05, 1949-12, 1967-06, 1976-02; DIN 2534: 1926-07, 1943-05, 1949-1 2, 1967-06, 1976-02; DIN 2
8、535: 1926-07, 1943-05, 1949-1 2, 1967-06, 1976-02; DIN 28504: 1963-07, 1965-08; DIN 28505: 1963-07, 1965-08; DIN 28506: 1970-1 1 DIN 28507: 1970-11; DIN 28604: 1970-11, 1976-03, 1990-01; DIN 28605: 1970-11, 1990-01; DIN 28606: 1970-11, 1990-01 DIN 28607: 1970-1 1, 1990-01. Continued overleaf. EN com
9、prises 43 pages. Q No part of this standard may be reproduced without the prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen) Ref. No. DIN EN 1092-2: 1997-06 English price group 14 Sales No.
10、 11 14 01.98 Page 2 DIN EN 1092-2: 1997-06 National Annex NA Standards referred to (and not included in Normative references) DIN 1691 Grey cast iron - Properties DIN 1693-1 Spheroidal graphite cast iron - Unalloyed and low alloy grades DIN 1693-2 Spheroidal graphite cast iron - Unalloyed and low al
11、loy grades - Properties of cast-on test piece DIN 4763 Grading of values for surface roughness parameters DIN 28500 Cast iron pressure pipes and fittings - Technical delivery conditions DIN EN 545 Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test
12、methods DIN EN 598 Ductile iron pipes, fitting, accessories and their joints for sewerage application - Requirements and test methods DIN EN IS0 6708 Pipework components - Definition and selection of DN (nominal size) (IS0 6708: 1995) EUROPEAN STANDARD EUROPISCHE NORM NORME EUROPENNE EN 1092-2 April
13、 1997 ICs 23.040.60 Descriptors: Pipework, flanges, cast iron. English version Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 2: Cast iron flanges Brides et leurs assemblages - Brides circu- laires pour tuyaux, appareil de robinetterie, racc
14、ords et accessoires, designes PN - Partie 2: Brides en fonte Flansche und ihre Verbindungen - Runde Flansche fr Rohre, Armaturen, Form- stcke und Zubehrteile, nach PN bezeichnet - Teil 2: Gueisenflansche This European Standard was approved by CEN on 1996-12-29. CEN members are bound to comply with t
15、he 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 standards may be obtained on application to the Central Secretariat o
16、r to any CEN member. The European Standards exist 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 Central Secretariat has the same status as the official versi
17、ons. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Co
18、mit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1997. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 1092-2: 1997 E Page 2 EN 1092-2 : 1997 Contents Page For
19、eword 4 Introduction 1 2 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 4 4.1 4.2 4.3 4.4 4.5 5 5.1 5.2 5.3 5.4 5.5 5.6 5 .I 5.8 5.9 Scope Normative references Definitions flange DN (Nominal size) PN ductile iron grey iron malleable iron joint Designation and types Range of DN Range of PN designations Types of flang
20、es Standard designation Information to be supplied by the purchaser General requirements Flange material Repairs by welding Bolting Gaskets Pressure/Temperature (p/T) ratings Dimensions Flange facings Spot facing or back facing Tolerances 5.10 Marking and stamping 5.11 Quality assurance Annex A (nor
21、mative): Information to be supplied by the purchaser Annex B (informative): Notes to tables 6 to 12 5 5 5 9 9 9 9 9 10 11 11 12 13 13 13 42 43 Annex C (informative): Bibliography 43 Page 3 EN 1092-2 : 1997 Tables Table 1: Numerical values of the surface finish parameters (R, and RJ of flange jointin
22、g faces Table 2: Synoptic table for ductile iron flanges Table 3: Synoptic table for grey iron flanges Table 4: Synoptic table for malleable iron flanges Table 5: Dimensions for type B flange facings Table 6: Dimensions of PN 2,5 flanges Table 7: Dimensions of PN 6 flanges Table 8: Dimensions of PN
23、10 flanges Table 9: Dimensions of PN 16 flanges Table 10: Dimensions of PN 25 flanges Table 11 : Dimensions of PN 40 flanges Table 12: Dimensions of PN 63 flanges Table 13: Tolerances on dimensions Table 14: Materials and assigned PN values Table 15: Pressure/Temperature ratings for high strength du
24、ctile iron flanges Table 16: Pressure/Temperature ratings for low strength ductile iron flanges Table 17: Pressure/Temperature ratings for grey iron flanges Table 18 : Pressure/Tempeature ratings for malleable iron flanges Figures Figure 1: Types of flanges Figure 2: Flange facing types A and B Figu
25、re 3: Dimensions of PN 2,5 flanges Figure 4: Dimensions of PN 6 flanges Figure 5: Dimensions of PN 10 flanges Figure 6: Dimensions of PN 16 flanges Figure 7: Dimensions of PN 25 flanges Figure 8: Dimensions of PN 40 flanges Figure 9: Dimensions of PN 63 flanges Page 4 EN 1092-2 : 1997 Foreword This
26、European Standard has been prepared Technical Committee CEN/TC 74 Flanges and their joints, the secretariat of which is held by DIN. EN 1092 will consist of the following six parts: Part 1 : Steel flanges Part 2 : Cast iron flanges Part 3 : Copper alloy flanges Part 4 : Aluminium alloy flanges Part
27、5 : Flanges in other metallic materiais Part 6 : Non-metallic flanges This standard is related to IS0 7005-2 : 1988 and IS0 2531 : 1991 in respect of flanges having the same PN designation. The types of flanges and their mating dimensions are compatible with those flanges of the same DN and PN given
28、 in IS0 7005-2 : 1988 and IS0 2531 : 1991. 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. This European Standard shall be given the status of a national standard, either by publication of an id
29、entical text or by endorsement, at the latest by October 1997, and conflicting national standards shall be withdrawn at the latest by October 1997. According to the CENRENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European S
30、tandard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 5 EN 1092-2 : 1997 Introduction The product which is in permanent or temporary contact wit
31、h water, intended for human consumption, does not adversely affect the quality of the drinking water and does not contravene the EC Directives and EFTA Regulations on the quality of drinking water. 1 Scope This standard specifies requirements for circular flanges made from ductile, grey and malleabl
32、e cast iron for DN 10 to DN 4000 and PN 2,5 to PN 63. (See 4.1 and 4.2). This standard specifies the types of flanges and their facings, dimension and tolerances, bolt sizes, surface finish of jointing faces, marking, testing, quality assurance and materials together with associated pressure/tempera
33、ture (p/T) ratings. 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 ame
34、ndments to or revision 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. EN 545 Ductile iron pipes, fittings, accessories and their joints for water pip
35、elines - Requirements and test methods prEN 1092-1 : 1994 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated Part 1: Steel flanges EN 1333 : 1996 Pipework components - Definition and selection of PN EN IS0 6708 : 1995 Pipework components - Definiti
36、on and selection of DN (nominal size) (IS0 6708 : 1995) EN IS0 9002 : 1994 Quality systems - Model for quality assurance in production, installations and servicing (IS0 9002 : 1994) IS0 185 : 1988 Classification of grey cast iron IS0 468 : 1982 Surface roughness - Parameters, their values and genera
37、l rules specifying requirements IS0 887 : 1983 Plain washers for metric bolts, screws and nuts - General plan Page 6 EN 1092-2 : 1997 IS02531 : 1991 IS0 2632-3 : 1979 IS0 5458 : 1987 IS0 5922 : 1981 IS0 7005-2 1988 Ductile iron pipes, fittings and accessories for pressure pipelines Roughness compari
38、son specimens Technical drawings - Geometrical tolerancing - Positional tolerancing Malleable cast iron Cast iron flanges 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 flange : Flat circular end of a pipe component extending perpendicular to its axis, with boi
39、t holes equally spaced on a circle (see figure i). NOTE : A flange may be fixed (i.e. integrally cast, screwed or welded on) or adjustable; an adjustable flange comprises a ring, in one or several parts assembled together, which bears on an end joint hub and can be freely rotated around the pipe axi
40、s before jointing. 3.2 DN (Nominal size) : See EN IS0 6708 : 1995. NOTE: A numerical designation of size which is common to ail components in a piping system. It is a convenient round-number for reference purposes and is only loosely related to manufacturing dimensions. 3.3 PN : See EN 1333 : 1996.
41、NOTE: A numerical designation of flanged components which is a convenient round- number for reference purposes. All components of the same nominal size DN designated by the same PN have compatible mating dimensions. 3.4 ductile iron : A cast iron in which graphite is present substantially in spherod
42、al form. Page 7 EN 1092-2 : 1997 3.5 grey iron : A cast iron in which graphite is present substantially in lamellar form 3.6 malleable iron : A cast iron in which graphite is present substantially in nodular form (temper carbon), and can be partially or wholly decarburized. 3.7 joint : A connection
43、between the flanged ends of piping systems components in which a gasket is used to effect a seal. 4 Designation and types 4.1 Range of DN DN 10 - DN 15 - DN 20 - DN 25 - DN 32 - DN 40 - DN 50 - DN 60 - DN 65 - DN 80 - DN 100 - DN 125 - DN 150 - DN 200 - DN 250- DN 300 - DN 350 - DN400 - DN 450 - DN
44、500 - DN600 - DN 700- DN 800 - DN 900 - DN 1000 - DN 1100- DN 1200 - DN 1400 - DN 1500 - DN 1600 - DN 1800 - DN 2000 - DN 2200 - DN 2400 - DN 2600 - DN 2800 - DN 3000 - DN 3200 - DN 3400 - DN 3600 - DN 3800 - DN 4000. The range of DN applicable to each flange type and to each PN shall be as specifie
45、d in tables 2 to 4 as appropriate. 4.2 Range of PN designations PN 2,5 - PN 6 - PN 10 - PN 16 - PN 25 - PN40 - PN 63 4.3 Types of flanges Figure 1 illustrates flanges identified according to type: 05 : blank flange 11 : weid-neck flange 12 : hubbed slip-on flange for welding 13 : hubbed threaded fla
46、nge 14 : hubbed socket welding flange 16 : adjustable flange Page 8 EN 1092-2 : 1997 21 : integral flange NOTE : By agreement between customer and manufacturer, an integral flange, modified as follows, can be supplied: a) bolt hole diameters and flange facing diameter in accordance with prEN 1092-1;
47、 b) for ductile iron, flange thickness to be as grey iron flanges. Such flanges shall be designated as type 21-2. Figure 2 illustrates facing types A and B, which are used where applicable in conjunction with flanges shown in figure 1 (see 5.7.1). 4.4 Standard designation Flanges conforming to this
48、standard shall be designated as follows: a) term: flange; b) number of this standard: EN 1092-2; c) DN (see 4.1); d) PN (see 4.2); e) Number of flange type (see 4.3); 9 Material type and grade (see 5.1); g) flange facing type for malleable cast iron (see 5.7.1). EXAMPLE Designation of a weld-neck fl
49、ange DN100, PN 40, type 11, material type MI and grade B30- 06 and facing type A: Flange EN 1092-2/DN100/PN40/11/FM B30-06/A 4.5 Information to be supplied by the purchaser The information to be supplied by the purchaser shall be as given in annex A. Page 9 EN 1092-2 : 1997 5 General requirements 5.1 Flange materiais Flanges shall be manufactured from the materials specified in table 14. 5.2 Repairs by welding Where not otherwise prohibited by the applicable material standard, repairs by welding are permitted when there is a proven method. All welding shall be carried out
