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IS0 7483 INTERNATIONAL STANDARD First edition 1991-10-01 - Dimensions IS0 7005 Dimensions -. . _ _-_ - - - of gaskets for use with flanges to des joints B utiliser avec les brides de I’ISO 7005 Reference number IS0 7483:1991(E) IS0 7483:1991(E) Contents Page Section General 1.1 Scope 1.2 Normative 1.3 Definitions 1.4 Gasket forms S&Ion references - Non-metallic 2.2 Gasket types 2.3 Range of gasket sizes 2.4 Dimensions 3 * .I 15 Spiral wound gaskets 3.2 Gasket designs according 3.3 Marking 3.4 Dimensions to flange facing 15 16 16 16 Metallic ring-joint 4.1 Gasket designs 4.2 Dimensions 4.3 Surface texture 4.4 Identification 4.5 Marking 4.6 Typical materials gaskets and tolerances Gasket designs 5.2 Gasket applications 22 22 22 22 22 Non-metallic 22 number 5.1 for metallic ring-joint envelope gaskets gaskets I .* IS0 1991 All rights reserved No part of this publication may be reproduced or by any means, electronic or mechanical, including photocopying permission In writing from the publisher international Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed In Switzerland ii Gasket designs Section 3.1 Section * flat gaskets Gasket designs 2.1 Section 27 28 28 28 or utilized in any form and microfilm, without IS0 7483:1991(E) 5.3 * 28 Dimensions Section Corrugated, flat or grooved metallic and filled metallic *1 gaskets 6.1 Gasket designs 6.2 Gasket types 6.3 Dimensions 30 .- 30 * 30 ~ 30 Annexes A Flange facing types Information 32 to be supplied by the purchaser 33 .~ 33 B.1 General B.2 For non-metallic 8.3 For spiral wound gaskets 8.4 For metallic B.5 For non-metallic B.6 For corrugaled, flat or grooved metallic and filled metallic 33 gaskets flat gaskets ring-joint 33 gaskets 33 33 envelope gaskets .s 33 III IS0 7483:1991(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies) The work of preparing International Standards is normally carried out through IS0 technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an lnternational Standard requires approval by at least 75 % of the member bodies casting a vote International Standard IS0 7483 was prepared by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings, Sub-Committee SC IO, Metallic f7anges and their joints Annexes A and B of this International Standard are for information only IS0 7483:1991(E) Introduction This International Standard has been prepared in order to specify dimensions of gaskets for use with flanges to the following standards: IS0 7005-1, Metallic flanges - Part 1: Steel flanqes c IS0 7005-2, Metallic #7anges - Part 2: Cast iron flanges IS0 7005-3, Metallic flanges flanges - Part 3: Copper alloy and composite It is divided into sections, according to the form of gasket, as follows: Section 1: General Section 2: Non-metallic flat gaskets Section 3: Spiral wound gaskets Section 4: Metallic ring-joint Section 5: Non-metallic Section 6: Corrugated, gaskets gaskets envelope gaskets flat or grooved metallic and filled metallic The materials for gaskets are outside the scope of this International Standard but section lists the various forms of gaskets and the ranges of materials used for some gasket forms, and section gives hardness values of typical ring-joint gasket materials The selection of the gasket type, its material and thickness (as applicable) should take account of the operating conditions, the properties of the gasket material, the type of flange facing, the surface finish of the flange and the flange bolt loading Therefore, it is recommended that the selection of gaskets for any particular application is made in consultation with the gasket supplier Annex A lists for information the type of flange faces for which gaskets are specified in this International Standard and annex B gives information to be supplied by the purchaser when ordering gaskets This page intentionally left blank - - - - INTERNATIONAL IS0 7483:1991(E) STANDARD Dimensions of gaskets for use with flanges to IS0 7005 Section 1: 1.1 scope This International Standard specifies the dimensions of the following gaskets for use in conjunction with flanges to IS0 7005-1, IS0 7005-2 and IS0 7005-3 (see 1.4): a) non-metallic flat gaskets; ring-joint d) non-metallic gaskets; e) corrugated, flat or grooved metallic gaskets NOTE IS0 7005-2:1988, metallic A future part of IS0 7005 will cover and aluminium alloy flanges Normative To be published Metallic Metallic - flanges for gaskets (see the references components 2: Cast iron Part - of Part I: Steel - Part IS0 7005-3:1988, Metallic flanges alloy and composite f7anges IS0 7268:1983, Pipe nominal pressure Definition flanges - aluminium The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard At the time of publication, the editions indicated were valid All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- 1) components and filled 3: Copper Definition of ASTM A 182/A 182M - 87a, Forged or rolled alloysteel pipe flanges, forged fittings, and valves and parts for high-temperature service 1.3 1.2 Pipe f7anges The relevant nominal size (DN) and nominal pressure (PN) ranges for each form of gasket are given in sections to 6, as appropriate It does not cover the materials Introduction) IS0 468:1982, Surface roughness - Parameters, their values and general for specifying rules requirements IS0 7005-1:199V, f7anges gaskets; envelope plying the most recent editions of the standards indicated below Members of IEC and IS0 maintain registers of currently valid International Standards IS0 6708:1980, nominal size b) spiral wound qaskets; c) metallic General Definitions For the purposes of this International Standard, the definitions of nominal size (DN) given in IS0 6708 and nominal pressure (PN) given in IS0 7268 apply 1.4 Gasket forms The forms of gaskets specified in this International Standard are described and illustrated in table IS0 7483:1991(E) Table Gasket Rubber, without Sketches Gasket forms See Ring joint fabric Sketches Gasket section See section (octagonal) Rubber, with fabric insertion Ring joint (oval) Rubber, with fabric insertion/wire reinforcement Plastic material Expanded graphite, without insertion with or Envelope Compressed fibre, with a suitable binder for the operating conditions (see note 1) Corrugated corrugated filler metal with filler or metal jacketed with Cork based Corrugated metal Spiral wound, with centring ring and inner ring Grooved metal with or without a layer of additional gasket material Vegetable Spiral ring fibre wound, with centring Spiral wound sealing with inner ring element Spiral only element wound sealing Flat metal jacketed with filler Solid flat metal WARNING - Materials containing asbestos may be subject to legislation that requires when handling them to ensure that they not constitute a hazard to health precautions to be taken NOTES The types of flange facings are shown in annex A Information which should are specified be supplied in IS0 70051, by the purchaser !SO 70052 when and IS0 70053, ordering and, for information, gaskets is listed in annex B the facings IS0 7483:1991(E) Non-metallic Section 2: 2.1 Gasket flat gaskets designs Gaskets shall be manufactured from either a) single flat sheet, or b) laminated ply, in a single material or combination NOTE table Examples of typical of materials materials are given in WARNING - Compressed fibre gaskets may contain asbestos Materials containing asbestos may be subject to legislation that requires precautions to be taken when handling them to ensure that they not constitute a hazard to health Figure - Type A flange facings with full face gasket 2.2 Gasket types Gaskets shall be one of the following types: a) full face gasket for type A (flat face) or type B (raised face) flange facings [see figures and 5a)l.9 b) IBC (inside bolt circle) gasket for type A (flat face) or type B (raised face) flange facings [see figures and 5b)]; c) tongue and groove gasket for type C/D flange facings [see figures and 5b)]; d) spigot and recess gasket for type E/F flange facings [see figures and 5b)]; e) segmental gasket (see note below) Gaskets of the types described in a), b), c) and NOTE d) and having an outside diameter greater than 1500 mm may be available only in segmental form The purchaser should consult the gasket manufacturer or supplier as to the forms available for the larger sizes of gasket NOTE - For PN 20, PN 50, PN 110 and PN 150 the IBC gasket extends to touch the bolt Figure - Type B flange facings with IBC gasket IS0 7483:1991 (E) 2.3 Range of gasket sizes The ranges of sizes of gaskets to suit the nominal sizes (DN) and nominal pressures (PN) of flanges are given in table2 for the different gasket types 2.4 Figure - Dimensions Type CID flange facings with tongue and groove gasket 2.4.1 Thickness Gasket thicknesses for non-metallic flat gasket materials given in table shall be selected from table 2.4.2 Figure - Type E/F flange facings with spigot and recess gasket Diameters The dimensions for diameters tables to 11, as appropriate; are shown in figure5 shall be as given in the plan dimensions IS0 7483:1991(E) a) Figure 20 Tongue and groove IO - b) Spigot and recess Flange facings, tongue and groove (type C/D) and spigot and recess (type E/F) IS0 7483:1991(E) Table 13 - of tongue and groove (type C/D) and spigot and recess (type E/F) flange facings Dimensions Dimensions Nominal Flange size DN face dimensions f3 z Y y 35 40 51 58 66 76 88 110 121 150 176 204 260 313 364 422 474 524 574 676 778 883 988 1094 23 28 35 42 50 60 72 94 105 128 154 182 238 291 342 394 446 496 548 648 750 853 960 1060 outside diameter, Z is the recess / z f3 PN 20, PN 50, PN 110, PN 150, PN 260, PN 420 PN 10, PN 16, PN 25, PN 40 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 in millimetres 36,5 44,5 52,5 65 74,5 93,5 106,5 128,5 159 187,5 217,5 271,5 325,5 382,5 414,5 471,5 535 586 694 3 3 3 3 395 3,5 33 33 33 395 4 4 4 4 24 32 36,5 46 52,5 71,5 84 106,5 130,5 159 189 236,5 284,5 341,5 373 424 487,5 532 640 5 5 5 5 5 5 5 5 5 NOTES Y is the recess Inside and outside diameters manufacturer’s gaskets of inside diameter, gaskets to suit these dimensions and f3 is the recess will depend depth on the characteristics of individual 21 IS0 7483:1991(E) Section 4: 4.1 Gasket 4.3 designs for use with type J, ring-joint, Metallic gaskets facings either shall have a cross-sectional a) octagonal, Metallic ring-joint gaskets Surface texture compared by visual or tactile means with reference specimens, the surface texture of the 23O surfaces of octagonal gaskets and the contact faces of oval gaskets shall be in accordance with the values specified in table 16 When flange shape which is or NOTE 16 b) oval It is not intended that instrument measure- ments be taken on the faces themselves; the R, and R, values as defined in IS0 468 relate to the reference NOTES specimens flange joints 12 Figure 11 shows octagonal and oval ring-joint gaskets illustrating both 4.4 gasket with 13 If the purchaser requires a ring-joint particular cross-sectional shape, then this requirement should be stated in the enquiry and/or order 4.2 Dimensions a and tolerances Identification number Identification numbers, prefixed by the letter R, as specified in table 14 shall be assigned to metallic ring-joint gaskets 4.5 Marking 4.2.1 Metallic ring-joint gaskets shall have the dimensions as specified in table 14 and figure 12 The outer surface of each gasket shall be marked with the following: Dimensions of grooves and gaskets are such NOTE 14 that, when joints are assembled, the flanges are apart and a) the manufacturer’s the approximate distances which the flanges are apart for each nominal pressure (PN) designation are given in the appropriate table of IS0 7005-l b) the gasket identification letter ftgure The tolerances 12) shall on dimensions be as specified (as shown in table 15 The presence of a small forging fin, located NOTE 15 that it does not prevent the ring from seating properly the groove, is acceptable 22 in so in number prefixed by the R (see 4.4); c) the material 4.2.2 name or trade-mark; identification Where a material is used that is listed in 4.6, then the material identification symbol given shall be used The application of marking shall not damage the contact faces or otherwise harmfully distort the gasket IS0 7483:1991 (E) a) Oval type b) Figure 11 - Details of metallic ring-joint Octagonal type gaskets as housed A RI = 1,6 mm for ring widths A < 22,3 mm RI = 2,4 mm for ring widths A > 22,3 mm Figure 12 - Dimensions of metallic ring-joint gaskets 23 IS0 7483:1991(E) Table Identification 14 - numbers and dimensions of metallic ring-joint gaskets Dimensions Nominal size I Mean pitch diameter Ring identification number - - 15 15 RJ2 - ,.32 - - 15 R,13 I Height of ring Width of ring 42,34 in millimetres 7,94 14,29 Width of flat of octagonal 5,23 12,7 - - - 20 20 R,14 44,45 7,94 14,29 - 25 - - - R,15 47,63 7,94 A,- - 25 25 25 20 RJ6 50,8 7,94 5.23 12-7 ^ - - L_ 12,7 5.23 12,7 5,23 14,29 12-7 5,23 14,29 12,7 5.23 14,29 -m-w 14,29 I 32 - - - 40 32 32 " j/ 14‘29 - 40 40 I 40 I - I I - 50 - - R,20 I 32 I R,21 I 68,26 72,24 I - R,22 I I 82,55 7,94 14,29 - 11,ll 17,46 7,94 14,29 - - - 50 40 R,23 82,55 11,ll I 17,46 15,88 I - 50 - 50 R,24 95,25 11,ll - - - R,25 101,6 50 R,26 - R,27 T 17,46 15,88 I 7,75 I 5,23 7,94 14,29 I l2,7 101,6 11,ll 17,46 I 15,88 107,95 11,ll 17,46 12,7 19,05 7,94 14,29 11,ll 17,46 15,88 7,75 11,ll 17,46 15,88 7,75 12,7 19,05 l7,46 8,66 11,ll 17,46 15,88 7,75 - - - 80 - 100 802) I 80 I I I 125 I 65 -80 80 I I I R,28 I R,31 I I I I I - 100 I R,29 R,30 R,32 R,35 I I I I I I I 111,13 114,3 117,48 123,83 127 136.53 I I I I I I I I I I 15,88 17,46 12,7 - - 125 l - - - 125 I - R,36 149,23 7,94 14,29 -_ R,37 149,23 11,ll 17,49 - I - 100 - 100 - R,38 R,39 - 157,16 161,93 R,40 I I I I 7,75 7,75 8,66 5,23 I 12,7 171,45 15,88 22,23 11,ll 17,46 7,94 - R,41 180,98 / 11,ll I 125 I R,42 I 190,5 I 19,05 14,29 I I I I 5,23 7,75 15,88 I - I - - 100 - 24 65 801) - I 65 I I I I I I - I - I - - - - 65 7,75 I I 65 5,23 12,7 I I 20,64 I 15,88 10,49 7,75 I 12,7 I 5,23 IS0 7483:1991(E) Nominal PN 50 and PN 110 PN 20 Mean pitch diameter Ring ’ identification number PN 150 PN 260 Width of ring P A n 14,29 - - - R,43 193,68 7,94 - - - 125 - R,44 193,68 11,ll 150 - - I I 150 - - 200 - 200 1 - - - 200 150 l - - - - - - I - - - I I - I I 150 - - - I I I - 200 R,45 211,14 I - 17,46 - 17,46 15,88 12,7 19,05 17,46 R,47 228,6 19,05 25,4 R,48 247.65 7,94 14,29 R,49 269,88 11,ll 23,81 ( 269,88 R,51 I 7,75 8,66 I 12,32 17,46 _- l&88 20,64 22,23 279,4 22,23 I 26,99 28,58 10,49 14,81 I _I 7,55 I - R,50 200 5,23 I 11,11 211.14 I 15,88 - - 12,7 R,46 I Width of flat of octagonal t-i ngs Octagonal ~- 250 -I Oval - - Height of ring PN 420 150 - I - I - T size ON R,52 304,8 7,94 14,29 12,7 I 5,23 250 250 - R,53 323.85 11,ll 17,46 - - 250 - R,54 323,85 1588 22,23 R,55 342.9 28,58 36,51 34,93 19,81 - R,56 381 7,94 14,29 12,7 5,23 - R,57 381 11,ll 17,46 15,88 - R,58 381 22,23 28,58 26,99 14,81 12,7 5,23 38,l 22,33 -300 I I I - I 350 300 -I - 300 - I I I 300 - - - -_-_- I 250 I I I I I -I I I 7,75 - - R,59 396,88 7,94 14,29 300 R,60 406,4 31,75 39,69 c - -_ 350 - R,61 419,l 11,ll 17,46 15,88 7,75 I - - 350 - - - R.62 419,l - - 350 R,63 419,l I 1588 22.23 20,64 25,4 33,34 31,75 17,3 7,94 14.29 12.7 5,23 15,88 7,75 20,64 10,49 34,93 19,81 12,7 5,23 17,46 15,88 7,75 25,4 23,81 12,32 10,49 -400 -.- - - R,64 454,03 - I.-400 - - R,65 469,9 11,ll 17,46 - -_ 400 _- R,66 15,88 469,9 22,23 - _I - - 400 R,67 469,9 450 - _ 28,58 - R,68 517,53 36,51 - -_ 7,94 14,29 - -.- 450 R,69 _- - 450 533,4 11,ll 533,4 19,05 - * - R,70 - - 450 -_ R,71 533,4 28,58 36,51 558,8 7,94 14,29 584,2 12,7 19,05 -500 - _- -. -_ R,72 - 500 - R,73 25 IS0 7483:1991(E) -Nominai size I ON PN 20 I -l PN 50 and PN 110 PN 150 PN 260 Mean pitch diameter Ring r vu Jl~ I idccantifiratinm number Width of ring Height of ring -.-Oval _ A Octagmal -1 - T - l R,93 / R,94 800,l 19,1 R,95 857,25 1991 914,4 I I 22,2 I -I 800I -.I - -_ I I I I I T - 850 749,3 19,l I R,96 R,97 I I I 965,2 If 23.81 35.4 _. _- _-_- -39,69 38,l _- ~I_- _ _ -19,l - - -e-y 23,8 _I , _ -2? -pIp.I_P23,8 -_ -27 I _ + . .-.- 22,2 27 _. - 27 t 34,9 _- - - 38.1 38.1 - - - I _ I I _-.I I I I - I I - I 900 600 - 600 _ 600 -I_ _ _- R, 105 R,76 I I 022,35 673,l I I 34,9 R,77 692,15 15,88 R,78 692.15 25,4 - 600 _.- 14,29 12,7 R,79 692,15 1) For ring joints with loose hubbed flanges for lapped pipe ends (type 15 flanges) 2) For flanges other than loose huhbed flanges for lapped pipe ends only 22,33 - 996 12.3 l l 12,3 I_-12.3 _ em14,8 14,8 -_ 14,8 _ 19,8 -22,3 22,3 22,3 I_24,8 -24,8 5,23 - 2?,23 20,54 - ~ 12,32 P .-P- _- - 41,3 , 7,94 C - 38,l -. .-41,3 - Width of flat of octagonal rings PN 420 I 750 I n 650 700 I I 33.34 - 34,93 10,49 31,75 17,3 41,28 24,82 - 44,45 IS0 7483:1991(E) Typical gaskets 4.6 Table 15 - Dimensional tolerances P Average pitch diameter of ring rt 0,18 mm A Width of ring f 0,2 mm Height of ringl) f 0,4 mm f 02 mm IJ and H Width of flat of octagonal c ring Angle 23” ring-joint Typical materials used for metallic ring-joint gaskets are specified in table 17 together with their recommended maximum hardness values Where a material listed is used, the identification symbols given shall be used for marking purposes as appropriate (see 4.5) f 0,5” Radius of ring Rl for metallic Tolerance Designation Symbol materials A- 0,4 mm 1) A plus tolerance of 1,2 mm for heights B and I? is permitted provided that the variation in the height of any given ring does not exceed 0,4 mm throughout its entire circumference NOTE 17 The materials used for the gaskets should have a hardness value lower than that of the flange ma- Table 16 - Surface texture of ring faces Values b in micrometres 43 ness as gaskets made of the same material < 6,3 Table If - terial to ensure tight joints However, it may not be possible for the hardness values of metallic ring-joints to be lower than those of the flange for some alloys For example, stainless steef alloy flanges, heat-treated for optimum corrosion resistance, will have the same range of hardto minimum Hardness values and material identification symbols for ring-joint Recommended Metallic ring-joint gasket material Low-carbon steel % to O/o chromium/O,5 % molybdenum maximum steel gaskets hardness Identification symbol Rockwell*) BrineIll) Soft iron and annealed hardness HB HRB 90 56 120 68 S 130 72 F53) D Type 410 steel 170 86 s410 Type 304 steel 160 83 s304 Type 316 steel 160 83 S316 Type 321 steel 160 83 S321 Type 347 steel 160 83 s347 Type 316Ti steel 160 83 S316Ti 1) Brinell hardness 2) Rockwell 3) F5 identification measured B hardness with 3000 measured designates with ASTM kg load, except for soft iron which 100 kg load and 1,59 mm diameter A 182/A 182M - 87a chemical is measured with 500 kg load ball composition requirements only 27 IS0 7483:1991(E) Section 5: 5.1 Gasket Non-metallic designs Non-metallic taken when handling them to ensure constitute a hazard to health designs envelope gaskets shall be of one of the shown in figure 19 Each design is applicable only to certain nominal sizes (ON) and nominal pressures (PN) of flanges and is dependent upon manufacturing constraints 5.2 Gasket applications are usually manufactured from are usually manufactured from compressed fibre sheet jointings, including asbestos Other materials are also used to suit particular applications Gaskets shall be suitable for use with type A (flat face) or type B (raised face) flange facings WARNING - Materials containing asbestos are subject to legislation that requires precautions to be The dimensions of non-metallic shall be as specified in table 18 PTFE Gasket that they not 13 NOTES 18 envelope gaskets envelopes and the inserts 5.3 Dimensions a) Fin type c) Rounded d) Chamfer envelope type type Envelope inside diameter Envelope outside diameter Gasket outside diameter Figure 13 - Non-metallic envelope gaskets gaskets IS0 7483:1991 (E) Table Dimensions 18 - of non-metallic envelope gaskets Dimensions T in millimetres Enveiope inside diameter Envelope ON min PN6 PN 10 PN 16 PN 20 PN 25 PN 40 PN 50 10 18 22 27 34 43 36 40 50 60 70 80 39 44 54 64 76 86 96 46 51 61 71 82 92 107 127 142 162 192 218 273 328 378 438 489 539 594 695 46 51 61 71 82 92 107 127 142 162 192 218 273 329 384 444 495 555 617 734 46,5 56 65,5 75 84,5 104,5 123,5 136,5 174,5 196 221,5 278,5 338 408 449 513 548 605 716,5 46 51 61 71 82 92 107 127 142 168 194 224 284 340 400 457 514 564 624 731 46 51 61 71 82 92 107 127 142 168 194 224 290 352 417 474 546 571 628 747 52,5 66,5 73 82,5 94,5 111 129 148,5 180 215 250 306 360,5 421 484,5 538,5 595,5 653 774 Nominal 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 size 49 61 77 89 115 141 169 220 273 324 356 407 458 508 610 outside diameter 92 110 126 151 178 206 260 314 365 412 469 528 578 679 116 132 152 182 207 262 317 373 423 473 528 578 679 Gasket outside diameter m e 29 IS0 7483:1991(E) Section 6.1 Gasket Corrugated, 6: flat or grooved metal with filler or corrugated metal jacketed with filler; b) corrugated and filled them to ensure to health designs Gaskets shall be one of the following designs: a) corrugated metallic metal; a layer of ad- d) flat metal jacketed with filler; not constitute a hazard Gasket types Gaskets shall be suitable for use with type A (flat face) or type l3 (raised face) flanges (see figure 14) and shall be one of the following types: a) self-centring; e) solid flat metal WARNING - Corrugated metal gaskets with filler or metal jacketed gaskets with filler, corrugated grooved metal gaskets with or without a layer of additional gasket material and fiat metal jacketed gaskets with filler may contain asbestos Materials containing asbestos are subject to legislation that requires precautions to be taken when handling ti a) b) incorporating 6.3 a centring ring Dimenshs The dimensions of corrugated, flat or grooved metallic and filled metallic gaskets shall be as specified in table 19 Y Self-centring b) Gasket incorporating gasket NOTE - Type B, raised face flanges are shown Figure 14 - 30 gaskets NOTE 20 The materials of the gasket are chosen by the manufacturer to suit the operating conditions Therefore, it is incumbent upon the purchaser to define the operating conditions in the enquiry and/or order 6.2 c) grooved metal with or without ditional gasket material; that they metallic Gaskets for type A or type B flange facings a centring ring IS0 7483:1991(E) Table 19 - Corrugated, fiat or grooved metallic and filled metallic gaskets Dimensions Nominal size Gasket inside diameter In milli metres Gasket outside diameter’) ON PNIO PN 16 PN 25 PN 40 PN PN PN PN PN PN 20 50 110 150 260 420 PN 10 PN 16 PN 20 PN 25 PN 40 PN 50 PN 110 PN 150 PN 260 IO 18 - 48 48 - 48 48 15 20 22 27 22 27 53 63 53 63 46,5 56 53 63 53 63 52,5 66,5 52,5 66,5 62,s 69 62,5 69 69 75 25 32 40 34 43 49 34 43 49 73 84 94 73 84 94 65,5 75 84,5 73 a4 94 73 84 94 73 82,5 94,5 73 82,5 94,5 77,5 87 97 77,5 87 97 84 103 116 50 65 80 61 77 89 61 73 89 109 129 144 109 129 144 104,5 123,5 136,5 109 129 144 109 129 144 111 129 148,5 111 129 148,5 141 163,5 166,5 141 163,5 173 144,5 167 195,5 100 125 150 115 141 169 115 141 169 164 194 220 164 194 220 174,5 196 221,5 170 196 226 170 196 226 180 215 250 192 240 265 205 246,5 287,5 208,5 253 281,5 234 279 316,5 200 250 300 220 273 324 220 273 324 275 330 380 275 331 386 278,5 338 408 286 343 403 293 355 420 306 360,5 421 319 399 456 357,5 434 497,5 351,5 434,5 519,5 386 475,5 547 350 400 450 356 407 458 356 407 458 440 491 541 446 498 558 449 513 548 460 517 567 477 549 574 484,5 538,5 595,5 491 564 612 520 574 638 579 641 702,5 - 500 600 508 610 508 610 596 698 620 737 605 716,5 627 734 631 750 653 774 682 790 697,5 837,5 756 900,5 700 800 900 712 813 915 813 920 1020 807 914 1014 - 836 _-_- _I - _-_ _. . _ diameter- is equal 1) The gasket outside to the bolt circle 945 1045 diameter minus _._ PN 420 the bolt diameter 31 IS0 7483:1991 (E) Annex A (informative) Flange facing types Figure A.1 shows NOTE 21 the types See the relevant of flange faces specified in ISO 7005-1, part of IS0 7005 for the particular IS0 7005-2 and IS0 7005-3 flange facing types Type E: Spigot Type A : Flat face Type F: Recess Type B : Raised face Type C : Tongue Type J: Ring joint Type D : Groove Figure 32 A.1 - Flange facing types specified in IS0 70051, IS0 70052 and IS0 70053 IS0 7483:1991 (E) Annex B (informative) Information to be supplied gaskets 3.2.1); The following information should be supplied by the purchaser when ordering gaskets to this lnternational Standard 6.1 for type A or type B flange c) whether an inner ring is required flange facing gaskets (see 3.2.3) General a) the number IS0 7483; of this International Standard, i.e For metallic ring-joint 8.2 For non-metallic in cross-sectional e.g PN 25; b) the ring identification e) the expected operating duction); for type E/F gaskets a) whether an octagonal or oval shape is required (see 4.1); c) the nominal size, e.g ON 100; pressure, B.4 faces (see In addition to the general information specified B.?, the following information should be supplied: b) the form of gasket (see sections to 6); d) the nominal by the purchaser conditions number (see table 14); (see the Introc) the material (see 4.6) 8.5 fiat gaskets In addition to the general information specified B.1, the following information should be supplied: in For non-metallic envelope gaskets In addition to the general information specified B.l, the following information should be supplied: a) the gasket type (see 2.2); a) the design of gasket (see 5.1); b) the thickness b) the material in c) the material B.3 (see table and the Introduction); (see the Introduction) For spiral wound B.6 For corrugated, fiat or grooved metallic and filled metallic gaskets gaskets In addition to the general information specified B.l, the following information should be supplied: (see the Introduction) in a) the design of gasket (see 3.1); b) whether an inner ring is required for PN IO, PN 16, PN 20, PN 25, PN 40, PN 50 or PN 110 In addition to the general information specified B-1, the following information should be supplied: in a) the design of gasket (see 6.1); b) the type of gasket (see 6.2) 33 IS0 7483:1991(E) UDC 629762.42:621.643.412 Descriptors: pipelines, pipe joints, seals (stoppers), gaskets, spiral wound gaskets, metal gaskets, dimensions Price based on 33 pages
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