1、BSI Standards PublicationBS EN 12560-2:2013Flanges and their joints Dimensions of gaskets forClass-designated flangesPart 2: Spiral wound gaskets for use withsteel flangesBS EN 12560-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12560-2:2013.It supersed
2、es BS EN 12560-2:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/15/2, Flanges - Jointing materials and compounds.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport
3、 to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 75632 0ICS 23.040.01Compliance with a British Standard cannot confer immunity fromlegal obligations.Th
4、is British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2013.Amendments issued since publicationDate Text affectedBS EN 12560-2:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12560-2 September 2013 ICS 23.040.01 Supersedes EN 1256
5、0-2:2001English Version Flanges and their joints - Dimensions of gaskets for Class-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges Brides et leurs assemblages - Dimensions des joints pour brides dsignes Class - Partie 2: Joints spirals pour utilisation avec des brides en
6、 acier Flansche und ihre Verbindungen - Dichtungen fr Flansche mit Class-Bezeichnung - Teil 2: Spiraldichtungen fr Stahlflansche This European Standard was approved by CEN on 10 August 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
7、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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three
8、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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodie
9、s of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spa
10、in, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwid
11、e for CEN national Members. Ref. No. EN 12560-2:2013: EBS EN 12560-2:2013EN 12560-2:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Designations 5 4.1 Range of Class designations 5 4.2 Range of gasket sizes .5 4.3 Gasket designation 5 4.4 Informati
12、on to be supplied by the purchaser .5 5 Gasket designs and materials 6 5.1 Gasket designs 6 5.2 Materials .6 6 Construction .6 7 Gasket compression .7 8 Gasket types .7 9 Dimensions .7 10 Marking 11 10.1 General . 11 10.2 Colour coding 11 Annex A (informative) Minimum pipe wall thickness . 13 Biblio
13、graphy . 15 BS EN 12560-2:2013EN 12560-2:2013 (E) 3 Foreword This document (EN 12560-2:2013) 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 publ
14、ication of an identical text or by endorsement, at the latest by March 2014, and conflicting national standards shall be withdrawn at the latest by March 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC sha
15、ll not be held responsible for identifying any or all such patent rights. This document supersedes EN 12560-2:2001. The main changes to this standard compared with EN 12560-2:2001 are: a) The normative references have been updated. b) 5.2 has been revised, and warning clause on asbestos has been del
16、eted. c) Gasket requirements in Clause 8 have been revised. d) All tables in the standard have been revised. e) Informative Annex A with A-deviations for use of asbestos has been deleted. f) A Bibliography has been added. EN 12560, “Flanges and their joints Gaskets for Class-designated flanges“ cons
17、ists of seven parts: Part 1: Non-metallic flat gaskets with or without inserts Part 2: Spiral wound gaskets for use with steel flanges (the present document) Part 3: Non-metallic PTFE envelope gaskets Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges
18、 Part 5: Metallic ring joint gaskets for use with steel flanges Part 6: Covered serrated metal gaskets for use with steel flanges Part 7: Covered metal jacketed gaskets for use with steel flanges According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following
19、 countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norwa
20、y, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12560-2:2013EN 12560-2:2013 (E) 4 1 Scope This European Standard specifies the dimensions, design, types, designation, materials and marking of spiral wound gaskets for use with type A
21、flat face or type B raised face flange facings complying with EN 1759-1 for the following Class designations: Class 150, to Class 1 500 for nominal sizes DN 15 to DN 600, and Class designation 2 500 up to and including DN 300. The centering rings for the spiral wound gaskets according to this standa
22、rd are sized for use with imperial bolting. The dimensions of spiral wound gaskets for tongue and groove flange facing types and spigot and recess flange facing types to EN 1759-1 are not included in this standard. Such gaskets may be available, however, for these types of flange and the purchaser i
23、s advised to consult the manufacturer as to their availability. Similarly, for slip-on or screwed flange types, the manufacturer should be consulted about availability. NOTE Dimensions of other types of gasket for use with flanges complying with the requirements of EN 1759-1 are given in EN 12560-1,
24、 EN 12560-3, EN 12560-4 and EN 12560-5, EN 12560-6 and EN 12560-7. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 DN alphanumeric designation of size for components of a pipework system, which is used f
25、or reference purposes, comprised of the letters DN followed by a dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections Note 1 to entry: The number following the letters DN does not represent a measurable va
26、lue and should not be used for calculation purposes except where specified in the relevant standard. SOURCE: EN ISO 6708:1995, 2.1, definition slightly modified 3.2 NPS alphanumeric designation of size for components of a pipework system, which is used for reference purposes, comprised of the letter
27、s NPS followed by a dimensionless number which is indirectly related to the physical size of the bore or outside diameter of the end connections Note 1 to entry: The number following the letters NPS does not represent a measurable value and should not be used for calculation purposes except where sp
28、ecified in the relevant standard. SOURCE: EN 1759-1:2004, 3.3, definition slightly modified BS EN 12560-2:2013EN 12560-2:2013 (E) 5 3.3 Class alphanumeric designation used for reference purposes related to a combination of mechanical and dimensional characteristics of a component of a pipework syste
29、m, comprised of the word Class followed by a dimensionless whole number Note 1 to entry: The number following the word Class does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard. Note 2 to entry: The designation Class i
30、s not meaningful unless it is related to the relevant component standard number. SOURCE: EN 1759-1:2004, 3.1, definition slightly modified and NOTE 3 deleted 4 Designations 4.1 Range of Class designations Gaskets shall be designated as suitable for use with one or more of the flanges designated: a)
31、Class 150; b) Class 300; c) Class 600; d) Class 900; e) Class 1 500; f) Class 2 500. 4.2 Range of gasket sizes Gasket nominal sizes shall be designated in accordance with the ranges specified in Table 1. 4.3 Gasket designation Gasket types, as defined in Clause 8 and illustrated in Figure 1, shall b
32、e designated as: a) Type C/I; or b) Type C/O. 4.4 Information to be supplied by the purchaser When ordering gaskets, the purchaser shall provide to the supplier the: a) number and Part of this European Standard; b) gasket type designation (see 4.3) for incorporation of inner ring (see Clause 8); c)
33、nominal size (see Table 1); d) Class designation (see Table 1); BS EN 12560-2:2013EN 12560-2:2013 (E) 6 e) required gasket materials or, where the gasket manufacturer is required to select the materials, the expected operating conditions for the application(s) for which the gasket(s) will be used. B
34、efore ordering a gasket, it is recommended that the selection of the gasket type be made in consultation with the gasket supplier. The selection of gasket type should take account of the fluid, the operating conditions, the properties of the gasket materials, the type and surface finish of the flang
35、e facing and the flange bolt loading. EXAMPLE A gasket according to EN 12560-2, Type C/I, of nominal size DN 100, Class 150, winding material X4CrNi18-10 (abbreviation 304) and PTFE filler material shall be designated as: Gasket EN 12560-2 C/I DN 100 Class 150 304 PTFE 5 Gasket designs and materials
36、 5.1 Gasket designs Gaskets for which dimensions are specified shall be one of the designs shown in Figure 1. The centering ring and, where used, the inner ring, shall be suitably grooved to retain the sealing element. a) Type C/l b) Type C/O Figure 1 Spiral wound gasket designs NOTE 1 Type A and ty
37、pe B flange facings are shown in EN 1759 -1. NOTE 2 The profile of the metal winding of the sealing element is at the option of the manufacturer. 5.2 Materials A list of metal windings and filler materials is given in Table 3. The inner ring material shall match the winding material unless the purch
38、aser specifies otherwise. Gaskets made to this standard shall not contain asbestos. The centering ring may be carbon steel that is painted, metal plated or otherwise coated to inhibit atmospheric corrosion. The materials of the gasket, may, if required be chosen by the manufacturer to suit the opera
39、ting conditions in the enquiry and/or order (see 4.4). 6 Construction Spiral wound gaskets shall be constructed as alternative plies of preformed metal windings and pliant fillers which are spirally wound. For the finished gasket, the filler shall be essentially flush with, but not below, the metal
40、winding on both contact faces of the gasket. The thickness of the metal winding strip in the sealing BS EN 12560-2:2013EN 12560-2:2013 (E) 7 element shall be between 0,15 mm and 0,23 mm. The filler material thickness is left to the discretion of the manufacturer. The profile of the metal winding of
41、the sealing element is at the option of the manufacturer. The inner windings shall have a minimum of three plies of preformed metal strip without filler. The inner plies shall be spot-welded about their circumference with a minimum of three welds, each no further than 75 mm apart. The outer windings
42、 shall have a minimum of three plies of preformed metal without filler. The outer two plies shall be spot-welded about their circumference with a minimum of three terminal welds, with no more than 40 mm distance between the first and terminal welds. Four additional loose preformed metal windings bey
43、ond the terminal weld may be used to retain the gasket into the centering ring. 7 Gasket compression Gaskets for DN 15, DN 20 and DN 25 in Class 150, Class 300 and Class 600 shall be constructed so that an applied uniform bolt stress of 172 MPa, based on the nominal bolt root diameter, will compress
44、 the gasket to a thickness of 3,2 mm to 3,4 mm. All other gasket sizes and classes shall be constructed so that a uniform bolt stress of 207 MPa will compress the gasket to a thickness of 3,2 mm to 3,4 mm. 8 Gasket types Gaskets shall be either of the following types: a) sealing element type with ce
45、ntering ring and inner ring (designation: Type C/I); or b) sealing element type with centering ring only (designation: Type C/O). All gaskets shall have a centering ring. The centering ring thickness shall be from 2,97 mm to 3,33 mm and suitably grooved on the inside diameter so as to retain the spi
46、ral wound sealing element. Inner rings shall be furnished with all spiral wound gaskets having PTFE (polytetrafluoroethylene) filler material. Inner rings for flexible graphite filled spiral wound gaskets shall be furnished unless the purchaser specifies otherwise. All filler material inner rings sh
47、all be furnished in spiral wound gaskets for: DN 600 in Class 900; DN 300 and larger in Class 1 500; DN 100 and larger in Class 2 500. 9 Dimensions The diameters of spiral wound gaskets with centering ring, for use with types A and B flange facings, shall be as given in Table 1. For gaskets with an
48、inner ring, the sealing element outside diameter and centering ring outside diameter shall be as given in Table 1 and the inner ring inside diameter shall be as given in Table 2. NOTE Type A and B flange facings are shown in EN 1759-1. BS EN 12560-2:2013EN 12560-2:2013 (E) 8 The overall thickness is
49、 measured across the metallic portion of the sealing element of the gasket, the part not including the filler, as the latter may protrude slightly beyond the metal. The centering ring thickness shall be as given in Figure 2. Dimensions in millimetres Key 1 sealing element 2 inner ring 3 centering ring 4 bead 5 inner ring diameter 6 sealing element inner diameter 7 sealing element outer diameter 8 centering ring outer diameter Figure 2 Spiral wound gasket dimensions BS EN 12560-2:2013EN 12560-2:2013 (E) 9 Table 1 Diameters of spi
