1、BSI Standards PublicationBS EN 1514-2:2014Flanges and their joints Gaskets for PN-designatedflangesPart 2: Spiral wound gaskets for use withsteel flangesBS EN 1514-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1514-2:2014. Itsupersedes BS EN 1514-2:2005
2、 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/15/2, Flanges - Jointing materials and compounds.A list of organizations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 to include all the n
3、ecessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77211 5ICS 23.040.80Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard w
4、as published under the authority of theStandards Policy and Strategy Committee on 30 September 2014.Amendments issued since publicationDate Text affectedBS EN 1514-2:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1514-2 September 2014 ICS 23.040.80 Supersedes EN 1514-2:2005English Version
5、Flanges and their joints - Gaskets for PN-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges Brides et leurs assemblages - Joints pour les brides dsignes PN - Partie 2 : Joints spirals pour utilisation avec des brides en acier Flansche und ihre Verbindungen - Dichtungen fr
6、Flansche mit PN-Bezeichnung - Teil 2: Spiraldichtungen fr Stahlflansche This European Standard was approved by CEN on 25 July 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national stan
7、dard 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 official versions (English, French, German). A version in a
8、ny 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 bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Rep
9、ublic, 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, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEA
10、N COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1514-2:2014 EBS EN
11、1514-2:2014EN 1514-2:2014 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Designations 6 4.1 Essential features and dimensions6 4.1.1 General 6 4.1.2 Maximum compression .7 4.1.3 Use of an inner ring .7 4.2 Range of PN designations 7 4.3
12、 Range of DN (nominal sizes) 8 4.4 Gasket types .8 4.5 Information to be supplied by the purchaser .8 5 Gasket designs 8 6 Gasket types .9 7 Dimensions .9 8 Marking 13 8.1 General . 13 8.2 Colour coding 13 Annex A (informative) Information to be supplied by the purchaser 15 Bibliography . 16 BS EN 1
13、514-2:2014EN 1514-2:2014 (E) 3 Foreword This document (EN 1514-2:2014) 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 publication of an identica
14、l text or by endorsement, at the latest by March 2015, and conflicting national standards shall be withdrawn at the latest by March 2015. 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 shall not be held respons
15、ible for identifying any or all such patent rights. This document supersedes EN 1514-2:2005. The reason for the revision is to include dimensions for PN 16. The dimensions of the various components of the spiral wound gaskets described and their tolerances have been set with the objective of control
16、ling the possibility of protrusion of the inner ring into the bore of the pipeline being sealed. The other features of this European Standard have been set in order to ensure good functionality of spiral wound gaskets made according to this European Standard. EN 1514, Flanges and their joints (Dimen
17、sions of) gaskets for PN-designated flanges, consists of the following parts: Part 1: Non-metallic flat gaskets with or without inserts; Part 2: Spiral wound gaskets for use with steel flanges; Part 3: Non-metallic PTFE envelope gaskets; Part 4: Corrugated, flat or grooved metallic and filled metall
18、ic 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; Part 8: Polymeric O-Ring gaskets for grooved flanges. According to the CEN-CENELEC Internal Regulations, the national standards
19、 organizations of the following 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, Luxemb
20、ourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1514-2:2014EN 1514-2:2014 (E) 4 Introduction The dimensions of spiral wound gaskets for tongue and groove flanges and spigot and recess flanges to EN 1092
21、-1 are not included in this part of EN 1514. Such gaskets may be available for these types of flange and the purchaser is advised to consult the manufacturer as to their availability. BS EN 1514-2:2014EN 1514-2:2014 (E) 5 1 Scope This part of EN 1514 specifies the dimensions and marking of spiral wo
22、und gaskets for use in conjunction with flat face and raised face flanges complying with the requirements of EN 1092-1 for PN 10, PN 16, PN 25, PN 40, PN 63, PN 100 and PN 160 and up to and including DN 1 000. NOTE 1 Dimensions of other types of gaskets for use with flanges to EN 1092-1, EN 1092-2,
23、EN 1092-3 and EN 1092-4 are given in EN 1514-1, EN 1514-3, EN 1514-4, EN 1514-6, EN 1514-7 and EN 1514-8. NOTE 2 Annex A lists information to be supplied by the purchaser when ordering gaskets in circumstances where the choice of the gasket materials appropriate to the service is left to the manufac
24、turer. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including an
25、y amendments) applies. EN 1333, Flanges and their joints - Pipework components - Definition and selection of PN EN ISO 6708, Pipework components - Definition and selection of DN (nominal size) (ISO 6708) 3 Terms and definitions For the purposes of this document, the following terms and definitions a
26、pply. 3.1 DN alphanumeric designation of size for components of a pipework system, which is used for reference purposes. It comprises 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 c
27、onnections Note 1 to entry: The number following the letters DN 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: In those standards which use the DN designation system, any relationship between DN
28、and component dimensions should be given (e.g. DN/OD or DN/ID). Note 3 to entry: The preferred DN values are: DN 10 DN 250 DN 1 500 DN 15 DN 300 DN 1 600 DN 20 DN 350 DN 1 800 DN 25 DN 400 DN 2 000 DN 32 DN 450 DN 2 200 DN 40 DN 500 DN 2 400 DN 50 DN 600 DN 2 600 DN 60 DN 700 DN 2 800 DN 65 DN 800 D
29、N 3 000 DN 80 DN 900 DN 3 200 BS EN 1514-2:2014EN 1514-2:2014 (E) 6 DN 100 DN 1 000 DN 3 400 DN 125 DN 1 100 DN 3 600 DN 150 DN 1 200 DN 3 800 DN 200 DN 1 400 DN 4 000 SOURCE: EN ISO 6708:1995, 2.1 and Clause 3 3.2 PN alphanumeric designation used for reference purposes related to a combination of m
30、echanical and dimensional characteristics of a component of a pipework system. It comprises the letters PN followed by a dimensionless number Note 1 to entry: The number following the letters PN does not represent a measurable value and should not be used for calculation purposes except where specif
31、ied in the relevant standard. Note 2 to entry: The designation PN is not meaningful unless it is related to the relevant component standard number. Note 3 to entry: The maximum allowable pressure of a pipework component depends on the PN number, the material and design of the component, its maximum
32、allowable temperature, etc. The relevant European Component standards include tables of specified pressure/temperature ratings or, in minimum, include rules how to determine pressure/temperature ratings. Note 4 to entry: It is intended that all components with the same PN and DN designations have th
33、e same mating dimensions for compatible flange types. Note 5 to entry: The preferred PN values are: PN 2,5 PN 25 PN 160 PN 6 PN 40 PN 250 PN 10 PN 63 PN 320 PN 16 PN 100 PN 400 SOURCE: EN 1333:2006, 2.1 and Clause 3 4 Designations 4.1 Essential features and dimensions 4.1.1 General A major feature o
34、f the design of spiral wound gaskets meeting the requirements of this European Standard is the minimisation of the possibility of the inner ring protruding into the bore of the pipe to which the flange is attached. The fit of the inner ring and sealing element relative to the centring ring has been
35、selected to comply with this requirement. The essential features of a spiral wound gasket that complies with the requirements of this European Standard are given in Figures 1 and 2 and/or are shown in Table 1. BS EN 1514-2:2014EN 1514-2:2014 (E) 7 Table 1 Spiral wound gaskets - Essential features Pa
36、rameter Feature Movement of centre of inner ring relative to centring ring up to DN 200 : a maximum of 0,2 mm above DN 200 : a maximum of 0,4 mm Centring ring thickness 3 mm 0,25 mm Sealing element location groove shall be centrally located in the centring ring centre 0,1 mm Number of empty wraps on
37、 external diameter of the sealing element 3 to 5 Number of empty wraps on the internal diameter of the sealing element 2 to 3 Number of welds on the inner and outer diameters of the sealing element, i.e. on the empty wraps Minimum of 4 Thickness of the metal of the sealing element 0,2 mm 0,02 mm Wid
38、th of the profiled metal of the sealing element 4,5 mm300.+mm Thickness of the filler material As appropriate for the filler type Protrusion of the filler above the profiled metal of the sealing element 0,3 mm 0,1 mm Compression of the sealing element Shall not result in contact between the flange a
39、nd the centring ring (also see 4.1.2) Graphite ash content 2 % maximum by weight PTFE filler May be either sintered or un-sintered Sharp edges on inner and centring ring Shall be removed Dimensions Shall be as given in Table 2 4.1.2 Maximum compression Metal to metal contact between the centring rin
40、g and the flange shall not be achieved with the maximum load that can be generated by the flange bolts. 4.1.3 Use of an inner ring An inner ring shall be used with all gaskets using PTFE as the filler and with all gaskets for pressure groups PN 63, PN 100 and PN 160. In addition, it is strongly reco
41、mmended that an inner ring should be used with all gaskets, this should be specified on the order for all gaskets for pressure groups PN 10, PN 16, PN 25 and PN 40. 4.2 Range of PN designations Gaskets shall be designated as suitable for use with one or more of these PN flange designations: a) PN 10
42、; b) PN 16; c) PN 25; BS EN 1514-2:2014EN 1514-2:2014 (E) 8 d) PN 40; e) PN 63; f) PN 100; g) PN 160. 4.3 Range of DN (nominal sizes) Gasket nominal sizes shall be designated in accordance with the ranges specified in Table 2. 4.4 Gasket types Gasket types are shown in Clause 6 and illustrated in Fi
43、gure 1. 4.5 Information to be supplied by the purchaser Where the purchaser requires the manufacturer to specify the materials of the gasket, then the minimum information that shall be supplied to the manufacturer with the order is given in Annex A. 5 Gasket designs Gaskets for which dimensions are
44、specified shall be of one of the designs shown in Figure 1. The clearance between the sealing element and the centring ring shall be as shown in Figure 2. NOTE 1 Figure 1 shows a typical design of a metallic spiral wound gasket and, for use with type A or type B flanges. NOTE 2 Type A and type B fla
45、nge facings are illustrated in EN 1092-1. NOTE 3 The profile of the metal winding of the sealing element is at the option of the manufacturer. The materials of the gasket may be specified either by: a) the purchaser; or b) if required by the purchaser, by the manufacturer to suit the application ope
46、rating conditions. In this case, the purchaser shall define the operating conditions in the enquiry and/or order (see Annex A). The attention of the user is drawn to the load necessary to compress spiral wound gaskets and the available load with PN 10 flanges should be verified as adequate prior to
47、using these gaskets. BS EN 1514-2:2014EN 1514-2:2014 (E) 9 a) Type C/I b) Type C/O Figure 1 Spiral wound gaskets 6 Gasket types Gaskets shall be either: a) Type C/I having a sealing element with centring ring and inner ring; or b) Type C/O having a sealing element with centring ring. All gaskets sha
48、ll have a centring ring. All PN 63, PN 100 and PN 160 gaskets shall have an inner ring. All gaskets containing PTFE filler material shall have an inner ring. The use of an inner ring is recommended for all PN designations and the purchaser shall specify on the enquiry and/or order if an inner ring i
49、s required for PN 10, PN 16, PN 25 and PN 40 gaskets (see Annex A). The selection of gasket type should take into account the fluids, the operating conditions, the properties of the gasket materials, the type and surface finish of the flange facing and the flange bolt loading. It is recommended that selection of gaskets for any particular application is made in consultation with the gasket supplier (see Annex A). 7 Dimensions The dimensions of spiral wound gaskets for Types A and B flange facings shall be as given in Table 2 and the overall thickn
