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1、BRITISH STANDARD BS EN 12560-6:2003 Flanges and their joints Gaskets for class-designated flanges Part 6: Covered serrated metal gaskets for use with steel flanges The European Standard EN 12560-6:2003 has the status of a British Standard ICS 23.040.80 ? Licensed Copy: sheffieldun sheffieldun, na, S
2、at Oct 28 07:00:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12560-6:2003 This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 22 December 2003 BSI 22 December 2003 ISBN 0 580 43133 9 National foreword This British Standard is the official
3、 English language version of EN 12560-6:2003. The UK participation in its preparation was entrusted to Technical Committee PSE/2, Jointing materials and compounds, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cros
4、s-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of
5、British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pr
6、esent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, a
7、n inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:38 GMT+00:0
8、0 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12560-6 December 2003 ICS 23.040.80 English version Flanges and their joints - Gaskets for Class-designated flanges - Part 6: Covered serrated metal gaskets for use with steel flanges Brides et leurs assemblages
9、- Joints pour les brides dsignes Class - Partie 6: Joints mtalliques stris revtus pour utilisation avec des brides en acier Flansche und ihre Verbindungen - Dichtungen fr Flansche mit Class-Bezeichnung - Teil 6: Kammprofildichtungen fr Stahlflansche This European Standard was approved by CEN on 3 No
10、vember 2003. 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 standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be
11、obtained on application to the Management Centre or to any CEN member. This European Standard exists 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 Management
12、 Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland
13、 and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12
14、560-6:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12560-6:2003 (E) 2 Contentspage Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Designations.5 4.1Range of class designations 5 4.2Range of gasket sizes .5 4
15、.3Gasket types.5 4.4Information to be supplied by the purchaser5 5Constructional details .5 5.1General details .5 5.2Core.5 5.2.1Core materials5 5.2.2Core welding.5 5.2.3Dressing of core welds6 5.2.4Core flatness 6 5.3Serrations .6 5.4Location rings 6 5.4.1Integral ring 6 5.4.2Loose ring.6 5.5Facing
16、 materials.6 5.6Facing weight per unit area 6 5.7Attachment of facing .7 5.7.1Methods of attachment7 5.7.2De-greasing of core .7 5.7.3Number of joins7 5.7.4Excessive facing7 5.8Integrity of facing attachment.7 5.9Typical construction details .7 6Dimensions.10 7Marking .11 8Colour coding.11 9Packagin
17、g.11 Annex A (informative) Information to be supplied by the purchaser.13 Annex B (informative) The use of metric bolting with class designated covered serrated metal gaskets14 B.1General14 B.2Comparable imperial & metric bolt sizes 14 B.3Gasket assembly guidance with metric bolting14 B.4Imperial/me
18、tric bolt comparisons 14 Bibliography15 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12560-6:2003 (E) 3 Foreword This document (EN 12560-6:2003) has been prepared by Technical Committee CEN/TC 74 “Flanges and their joints”, the secreta
19、riat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2004, and conflicting national standards shall be withdrawn at the latest by June 2004. The annex A is informativ
20、e and contains “Information to be supplied by the purchaser“. The annex B is informative and contains “The use of metric bolting with class designated covered serrated metal gaskets“. This document includes a Bibliography. EN 12560 consists of 7 parts: Part 1:Non-metallic flat gaskets with or withou
21、t 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 metallic gaskets for use with steel flanges Part 5:Metallic ring joint gaskets for use with steel flanges Part 6:Covered serrated metal ga
22、skets 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 organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmar
23、k, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12560-6:
24、2003 (E) 4 1 Scope This European Standard specifies the construction, dimensions and marking of covered serrated metal gaskets for use with flanges complying with prEN 1759-1 for Class 150, Class 300, Class 600, Class 900, Class 1500 and Class 2500 up to and including NPS 24. This document does not
25、extend to serrated covered metal based heat exchanger gaskets with pass bars or large vessel gaskets but, in the lack of a dedicated document for such gaskets, the principles set down can be applied to them. NOTE 1Dimensions of other types of gaskets for use with flanges to prEN 1759-1, EN 1759-3 an
26、d EN 1759-4 are given in EN 12560-1, EN 12560-2, EN 12560-3, EN 12560-4, EN 12560- 5 and prEN 12560-7. NOTE 2Annex A lists information that should 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 su
27、pplier. 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 amendments to
28、or revisions 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 (including amendments). prEN 1759-1, Flanges and their joints - Circular flanges for pipes
29、, valves, fittings and accessories, Class- designated - Part 1: Steel flanges, NPS 1/2 to 24. EN 1759-3:2003, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, Class designated Part 3: Copper alloy flanges. EN ISO 6708:1995, Pipework components Definition and sel
30、ection of DN (nominal size) (ISO 6708:1995). 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1759-3:2003, EN ISO 6708:1995 and the following apply. 3.1 covered serrated metal gasket consists of a sealing element with or without a location rin
31、g which may or may not be rigidly fixed to the sealing element. The sealing element consists of a metal core with serrated top and lower surfaces and a conformable sealing material adhered to each serrated surface. The serrations into metal core have the function of creating regions of high surface
32、pressure on the conformable sealing material to ensure the required level of tightness in service. The density of the sealing material in the serrations during service should also be high enough to ensure that secondary sealing is provided by the impermeable nature of the material between the tips o
33、f the serrations. In service the thickness of the sealing material over the serrations is minimal, often about 0,1 mm. The widths of the tips of the serrations should also be of the order of 0,1 mm 3.2 DN see EN ISO 6708 3.3 NPS see EN 1759-3 3.4 class see EN 1759-3 Licensed Copy: sheffieldun sheffi
34、eldun, na, Sat Oct 28 07:00:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12560-6:2003 (E) 5 4 Designations 4.1 Range of class designations Gaskets shall be designated as suitable for use with one or more of the following class designations of flange: Class 150, Class 300, Class 400, Class 600, C
35、lass 900, Class 1500 and Class 2500 4.2 Range of gasket sizes Gasket nominal sizes shall also be designated in accordance with the ranges specified in Table 1. The general principles described in this standard shall also be applied to gaskets outside of the range specified in Table 1 by agreement be
36、tween supplier and customer. 4.3 Gasket types Gasket types, as illustrated in Figure 1, shall be designated as: Type NR:Sealing element without any location ring. Type IR:Sealing element with integral location ring. Type LR:Sealing element with loose location ring. Type NR is used only with spigot f
37、aced or tongue & groove faced flanges. 4.4 Information to be supplied by the purchaser The selection of gasket materials and type should take into account the fluid, the operating conditions and the properties of the gasket materials as well as the type of flange. It is recommended that selection of
38、 a gasket for any particular application is made in consultation with the gasket supplier who will advise on the materials required for a particular service (see annex A). 5 Constructional details 5.1 General details Figure 1 gives illustrations of the cores and, where used, the location rings of th
39、e three types of covered serrated metal gasket listed in 4.3. Figure 2 shows a typical covered serrated metal gasket for use with type A and type B flanges, the Type A and B flange facings are specified in prEN 1759-1. 5.2 Core 5.2.1 Core materials The material of the core shall be selected to be co
40、mpatible with the intended service. The core thickness measured over the tips of the serrations shall be a minimum of three times the depth of the serrations. 5.2.2 Core welding If the core is of a welded construction then the method of welding shall be such as to ensure that the weld is throughout
41、the full thickness of the core. The number of welds shall not be more than two. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12560-6:2003 (E) 6 5.2.3 Dressing of core welds The welds shall be dressed to preserve the number and depth of
42、 the serrations of the rest of the core. 5.2.4 Core flatness The out of flatness of the serrated core shall not be more than 3 mm for every 300 mm of outside diameter. 5.3 Serrations The serration depth shall be a minimum of 0,4 mm. The pitch of the serration and the width of the serration shall be
43、arranged so that the width of the tips is 0,1 mm. The first and last tips of the serrated core should be as near as possible to the respective edges of the core. Proprietary forms of serrations and core profiles may be used by agreement between the purchaser and manufacturer. To reduce the possibili
44、ty of vibration induced cracking of the core, the radius at the bottom of the grooves shall be as large as possible. 5.4 Location rings 5.4.1 Integral ring The thickness of the integral ring shall be a minimum of twice the serration depth. The location ring shall be undercut on at least one side to
45、protect the sealing element in the event of thermal expansion induced interference between the location ring and the bolts of the flange. 5.4.2 Loose ring The thickness of the location ring shall be a minimum of 0,5 mm. When installed the ring shall be sufficiently loose in the location slot in the
46、core so that thermal expansion effects never cause the ring to become tight in the location slot. The location ring may be made in sections and assembled around the core. The sections of the assembled ring shall be either welded together or otherwise securely held together. The material of the loose
47、 location ring may be carbon steel. 5.5 Facing materials The facing material shall be selected to be suitable for the intended service and the material of the flanges. Suitable materials range from very soft, rubber bound, sheet material to metal foils. The facing material may be cut from sheet to t
48、he appropriate size, applied in the form of texturised tape or by any other means that meets the other requirements of this standard. 5.6 Facing weight per unit area The weight per unit area of facing in order to create the required level of tightness in service is a function of the thickness and de
49、nsity of the facing material, the depth, width and pitch of the serrations, the required in service density of the facing material and the thickness of facing required above the core in service. The weight per unit area shall be such that metal to metal contact between the tips of the serrations and the flange surface is avoided. For guidance, a satisfactory level of sealing is routinely achieved with graphite of 0,5 mm thickness and a density of 1,0 gm/cm3 as received when used with a core wher