1、lt * m STD-BSI BS EN 1072-2-ENGL 1777 = Lb24bb9 Ob37137 LBO BRITISH STANDARD Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated Part 2. Cast iron flanges The European Standard EN 1092-2 : 1997 has the status of a British Standard ICs 23.040.60 BS E
2、N 1092-2 : 1997 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 1092-2-ENGL 1777 m 1b24bb7 Ob37140 7T2 m BS EN 1092-2 : 1997 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PSW15, Mges
3、, upon which the foilowing bodies were represented British Compressed Gases Association British Foundry Association British Iron and Steel Producers Association British Malieable %be Fittings Association British Plumbing Fttings Manufacturers Association British Pump Manufacturers Association Britis
4、h Valve and Actuator Manufacturers Association Confederation of British Forgers Copper Development Association Energy Industries Council Engineering Equipment and Materials Users Association GAMBICA (BEAMA La.) Power Generation Contractors Association (PGCA (BEAMA Ltd.) This British Standard, having
5、 been prepared under the direction of the Sector Board for Engineering, was published under the authority of the Standards Board and comes into effect on 15 September 1997 O BSI 1997 Amendments issued since publication Amd*No* ID* I Te* affected The following BSI references relate to the work on thi
6、s standard Committee reference PSU15 Draft for comment 93/707537 DC ISBN O 680 27962 6 STD-BSI BS EN 1092-2-ENGL 1997 LbZLibbS Ob391LiL 837 m BS EN 1092-2 : 1997 Contents Page Committees responsible inside front cover Nationai foreword ii Foreword 2 Text of EN 1092-2 3 O BSI 1997 i STDmBSI BS EN L09
7、2-2-ENGL 1797 1b24bb7 Ob37142 775 = BS EN 1092-2 : 1997 National foreword This Part of BS EN 1092 has been prepared by Technical Committee PSW15, and is the English language version of EN 1092-2 : 1997 Flanges and th8irjoints - Circuhr jlanges for pipes, valves, fittings and accessories, PN designat
8、ed - Part 2: Cast iron jlanges, published by the European Committee for Standardization (GEN). It supersedes BS 4504 : Section 3.2 : 1989 which is withdrawn. Cross-references EN 545: 1994 Publication referred to Corresponding British Standard BS EN 545 : 1995 Ductzle iron pipes, fittings, accessorie
9、s and r%irjoints for water pipeines. Requiments and test methods BS EN 1333 : 1997 Pipework components. Defnitwn and selection of PN BS EN IS0 6708 : 1996 Pipework components. Definition and selection of DN (nominal size) BS EN IS0 9002 : 1994 QuuLity systems. Model for quality assurance in producti
10、on, installation and servicing EN 1333: 1996 EN IS0 6708 : 1995 EN IS0 9002 : 1994 Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 t
11、o 28, an inside back cover and a back cover. U O BSI 1997 EN 1092-2 April 1997 ICs 23.040.60 Descriptors: industrial piping, pipe flanges, cast iron, spheroidal graphite cast iron, malleable cast iron, doyed cast iron, designation, dimensions, dimensional tolerances, specifications, surface conditio
12、n, marking English version Flanges and their joints - Circular fianges for pipes, valves, Part 2: Cast iron fianges fim and accessOrie, PN designated - Brides et leurs assembhges - Brides circulaires pour tuyaux, appareil de robinetterie, raccords et aessoires, dSignes PN - Partie 2 Brides en fonte
13、Flansche und ihre Verbindungen - Runde Flansche fr Rohre, Armatwen, Formstcke und Zubehrteile, nach PN bezeichnet - Teil 2 Gueiseriansche This European Standard was approved by CEN on 199612-29. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conitions fo
14、r giving this European Standard the status of a national dandard without any alteration. Uptodate lists and bibliographical references concerning such national stan an adptable flange comprises a ring, in one or several parts assembled together, which bears on an end joint hub and can be freely rota
15、ted around the pipe axis before jointing. 3.2 DN (nominal size) See EN IS0 6708 : 1995. NOTE. A numerical designation of size which is common to all components in a piping system. It is a convenient round-number for reference purposes and is only loosely related to manuacturing dimensions. 3.3 PN Se
16、e EN 1333 : 1996. NOTE. A numerical designation of flan*:ed components which is a convenient round-number for reference purposes. Au components of the same nominal size DN designated by the same PN have compatibe mating dimensions. 3.4 ductile iron A cast iron in which graphite is present substantia
17、lly in spheroidal form. 3.6 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 between the fl
18、anged 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 - DN40- DN 50- DN 60 - DN 65 - DN 80 - DN 100 - DN 125 - DN 150- DN 200- DN 250- DN 300- DN 350- DN 400- DN 450- DN 500- DN 600- DN 700- DN
19、800- DN 900 - DN lo00 - 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 specified in tables 2 to 4 as appropriate. O
20、 BSI 1997 STD-BSI BS EN 1092-2-ENGL 1997 LbZLibbS Ob3919b 310 Page 4 EN 1092-2 : 1997 Type 11 Weld-neck flange Type 05 Blank flange Type 12 Hubbed slip-on flange for welding Type 13 Hubbed threaded flange Type 16 Adjustable flange Type 14 Hubbed socket welding flange =!=?= Type 21 Integral flange NO
21、TE 1. The transition from the edge of the raised face to the flange jointing face is either by radius or chamfer (see 5.7.1). NOTE 2. Type 21 flange is an integral part of some other product or component. NOTE 3. Flanges may be designated by type number or by description. Figure 1. “ b) for ductile
22、iron, flange thickness to be as grey iron flanges. Such flanges shali be designated as type 21-2. Figure 2 illustmtes facing types A and B, which are used where applicable in coqjunction with flanges shown in figure 1 (see 6.7.1). Type A Flat face f Type B Raised face NOTE. For application see 5.7.1
23、. Figure 2. Flange facing types A and 3 (see table 5 forfand d values of type B) Page 5 EN 1092-2 : 1997 4.4 Standard designation Flanges conformmg to this standard shal be designated as follows: a) temi: flange; b) number of this standard EN 1092-2; c) DN (see 4.1); d) PN (see 4.2); e) number of fl
24、ange type (see 4.3); f) materiai type and grade (see 6.1); g) fiange facing type for malleable cast iron (see 6.7.1). Example: Designation of a weld-neck flange DN 100, PN 40, type 11, material type MI and grade B30-06 and facing type A: Flange EN l92-N100“4O/ll/FM B36A 4.6 Information to be supplie
25、d by the purchaser The infodon to be supplied by the purchaser shall be as given in annexk 5 General requirements 6.1 Flange materials Fanges shall be manufactured from the mariak specified in table 14. 6.2 Repairs by welding Where not otherwise prohibited by the applicable material sandard, repairs
26、 by welding are permitted when there is a proven method. All weldmg shall be carried out in accordance with a written procedure. 5.3 Bolting The bolting shall be chosen by the user according to the pressure, temperature, flange material and gasket. For joints comprising at least one grey iron flange
27、 it is recommended that bolting having a yield strength not exceeding 240 N/m2 should be used. 6.4 Gaskets The gaskets are not within the scope of this standard. For informaion on types, dimensions and types of gaskets see EN 1514. 6.6 Pressurdtemperature (p/T) ratings 6.6.1 General The pressure/tem
28、perature ratui - PN 6 flanges: table 7 and figure 4; - PN 10 flanges: table 8 and figure 5; - PN 16 flanges: table 9 and figure 6; - PN 25 flanges: table 10 and figure 7; - PN 40 flanges: table 11 and figure 8 - PN 63 flanges: table 12 and figure 9. NOTE 1. Dimensions which are not given in this sta
29、ndard are determined by the manufacturer for his design of flange. NOTE 2. Details of attachment for welded, threaded and adjustable flanges are not within the scope of this standard. 6.7 Flange facings 6.7.1 mpes of facings The flange facings specified (flat face type A and raised face type B) are
30、ilusbxited in figure 2 and their raised face dimensions shail be as given in table 5. Flanges made of ductile iron shall have raised faces; Flanges made of grey iron shall have raised faces. See 6.3 for the limiations on bolting due to this material. Fanges made of maileable iron shall have either f
31、lat faces or raised faces. NOTE. The transition from the outside diameter of the raised face to the flange face is at the option of the manufacturer (i.e. either a dius or chamfer may be used). 6.7.2 Jointing face finish Ail flange jointing faces shall be finished in accordance with table 1. These f
32、aces shall be compared by visual or tactile means with reference specimens which conform with the Ra and R, roughness values given in table 1. NOTE 1. It is not intended that instrument measurements are taken on the flange jointing faces: the Ra and R, values as defined in IS0 468 : 1982 relate to t
33、he reference specimens. NOTE 2. Other finishes may be agreed between the manufacturer and purchaser. Ra Rz 3,2 to 12,5 12,5 to 50 Table 1. Numerical values of the surface finish parameters (Ra and b) PN designation; c) materiai identification; d) mufacturers name or trademark. Example: DN 300 PN 16
34、42M XXXX NOTE. Where a flange is subsequently used to form an integrai part of a component and the component has a lower pressure rating than that of the flange, the lower rating should be clearly marked on the component and the lower p/r rating applies. 6.10.2 Stamping Where steel stamps are used,
35、the marking shall be positioned on the rim of the flange. Low stress round nose stamps shall be used. O BSI 1997 STD-BSI BS EN L072-2-ENGL 1777 Lb2YbbS Ob371117 02T Page 7 EN 1092-2 : 1997 6.10.3 Omission of markings If aflange is too smail to enable ail the mar- required in 6.10.1 to be marked on t
36、he fiange, then markmg of nominal size may be omitted. 6.11 Quality assurance 6.11.1 General The foiiowing quality assurance requirement applies ta all types of flanges except for those delivered attached to a pipeline component. The quaity assurance requirements for those flanges are given in the a
37、ppropriate component standards. 6.11.2 Qualit refer to table 6 for the actual number. NOTE. For facing dimensions, see table 5 Figure 3. Dimensions of PN 2,5 flanges (see table 6) ble 6. Dimensions of PN 2,5 flanges (see figure 3 and annex B) DN 10 to lo00 1200 1400 1600 1800 ZOO0 2200 2400 2600 280
38、0 3OOo 3200 3400 3600 3800 4oOo Dimensions in miiiimetrer Mating dimensions Flange I Maximum Neck Comer Outside I Diameter I Diameter I Bolts thickness diameter diameter radii diame ter of flange D Flange type 05/21 I05/21 1 05 121 121 1375 1575 1790 1990 2190 2405 2605 2805 3030 3230 3430 3630 3840
39、 4045 4245 1320 1520 1730 1930 2130 2340 2540 2740 2960 3160 3360 3560 3770 3970 4170 31 31 31 31 31 34 34 34 37 37 37 37 37 41 41 32 36 40 44 48 52 56 60 64 68 72 76 80 80 84 Use PN6 1 See table 14 for an explanation of the abbreviated iron designations. These flange thicknesses are also valid for
40、ductile iron flanges tMe 21-2. 1250 1452 1654 1856 2056 2260 2464 2668 2868 3068 3268 3472 3676 3876 4076 8 8 10 10 10 10 10 10 12 12 12 12 12 12 12 O J3SI 1997 STD-BSI BS EN 1072-2-ENGL 1777 Lb24hb7 Ob37155 323 Page 13 EN 1092-2 : 1997 OK L D This diagram illustrates the arrangement but not necessa
41、rily the correct number of bolt holes; refer to table 7 for the actual number. NOTE. For facing dimensions, see rabie 5 I Figure 4. Dimensions of PN 6 flanges (see table 7) O BSI 1997 Page 14 EN 1092-2 : 1997 Diameter Bolts Ofbolt Number Nominal L hole size Table 7. Dimensions of PN 6 flanges (see f
42、igure 4 and annex B) Flange thickness Maximum Neck Corner GIi)z) diameter diameter radii of shoulder G C G N r DN 10 15 20 25 32 40 50 60 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 Dimensions in millimetre Matin
43、g dimensions Outside Diameter diameter of bolt of (II flange circle Flange type 13/05/21 75 80 90 100 120 130 140 150 160 190 2 10 240 265 320 375 440 490 540 595 645 755 860 975 1075 1175 1405 1630 1830 2045 2265 2475 2685 2905 3115 3315 3525 3735 3970 50 55 65 75 90 100 110 120 130 150 170 200 225
44、 280 335 395 445 495 550 600 705 810 920 1020 1120 1340 1560 1760 1970 2180 2390 2600 2810 3020 3220 3430 3640 3860 11 11 11 11 14 14 14 14 14 19 19 19 19 19 19 23 23 23 23 23 28 28 31 31 31 34 37 37 41 44 44 44 50 50 50 50 50 57 4 4 4 4 4 4 4 4 4 4 4 8 8 8 12 12 12 16 16 20 !O 24 24 24 28 i2 i6 10
45、14 18 52 56 50 54 58 72 76 30 M10 M10 M10 M10 M12 M12 M12 M12 M12 M16 M16 M16 M 16 M16 M16 M20 M20 M20 M20 M20 M24 M24 M27 M27 M27 M30 M33 M33 M36 M39 M39 M39 M45 M45 M45 M45 M45 M52 05/2 1 12 12 14 14 16 16 16 16 16 18 18 20 20 22 24 24 26 28 28 30 30 32 34 36 36 40 44 48 50 54 60 62 64 68 70 76 80
46、 84 15 13/21 20 26 34 44 54 64 74 84 94 110 130 160 182 238 284 342 392 442 494 544 642 746 850 950 1050 1264 1480 1680 1878 2082 9 9 3) 5) 9 $1 $1 9 13/21 3 3 4 4 5 5 5 6 6 6 6 6 8 8 10 10 10 10 12 12 12 12 12 12 12 12 12 12 15 15 15 15 15 15 15 15 15 15 See table 14 for an explanation of the abbre
47、viated iron designations. 2, These flange thicknesses are also valid for ductile iron flanges type 21-2 3, Manufacimers option. O BSI 1997 STDmBSI BS EN 1092-2-ENGL 1997 1bZYbbS Ob39157 LTb W Page 15 EN 1092-2 : 1997 Type II a- 3 rJ This diagram illustrates the arrangement but not necessarily the co
48、rrect number of bolt holes; refer to table 8 for the actual number. NOTE. For facing dimensions, see table 5. c( Type 14 I Figure 6. Dimensions of PN 10 flanges (see table 8) O BSI 1997 STDOBSI BS EN L072-2-ENGL 1777 Lb2LIbb7 Ob37158 832 Outside diameter of flange D Page 16 EN 1092-2 : 1997 Diameter
49、 Diameter Bolts of bolt of bolt Number Nominal circle hole K L size Table 8. Dimensions of PN 10 flanges (see figure 5 and annex B) 05/1U12/13/14/16/2 1 05/11 12/13 14/21 Dimensions in miiiimetre! 16 05/13 21 DN - 10 15 20 25 32 40 50 60 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 lo00 1100 1200 1400 1500 1600 1800 2000 24 26 26 - - - - - - - - - - - - - - - - Mating dimensions - - - 335 385 435 485 585 685 785 885 985 1085 1185 1385 1485 1585 1785 1985 Use PN 16 dimensions 340 3952) 4452) 505 565 615
