1、BSI Standards PublicationBS EN 13555:2014Flanges and their joints Gasket parameters and testprocedures relevant to thedesign rules for gasketedcircular flange connectionsBS EN 13555:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13555:2014. Itsupersedes BS
2、 EN 13555:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/15/2, Flanges - Jointing materials and compounds.A list of organizations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 inc
3、lude all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 75691 7ICS 23.040.60; 23.040.80Compliance with a British Standard cannot confer immunity fromlegal obligation
4、s.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedBS EN 13555:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13555 April 2014 ICS 23.040.60; 23.040.80 Supersedes EN 135
5、55:2004English Version Flanges and their joints - Gasket parameters and test procedures relevant to the design rules for gasketed circular flange connections Brides et leurs assemblages - Paramtres de joints et procdures dessai relatives aux rgles de calcul des assemblages brides circulaires avec jo
6、int Flansche und ihre Verbindungen - Dichtungskennwerte und Prfverfahren fr die Anwendung der Regeln fr die Auslegung von Flanschverbindungen mit runden Flanschen und Dichtungen This European Standard was approved by CEN on 28 February 2014. CEN members are bound to comply with the CEN/CENELEC Inter
7、nal 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 obtained on application to the CEN-CENELEC Management Centre or to any
8、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 CEN-CENELEC Management Centre has the same status as the official ver
9、sions. CEN members are the national standards bodies 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,
10、 Poland, Portugal, Romania, Slovakia, Slovenia, Spain, 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 2014 CEN All rights of exploita
11、tion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13555:2014 EBS EN 13555:2014EN 13555:2014 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .7 4 Symbols 8 5 List of gasket parameters .9 6 Test equipmen
12、t 9 6.1 Design .9 6.2 Test platens 9 6.3 Metal Foils . 10 6.4 Surface finish 10 6.5 Measurement of gasket thickness 10 6.6 Loading 10 6.7 Temperature 10 6.8 Leakage measurement . 11 7 Test gaskets 11 7.1 Number of gaskets 11 7.2 Procurement and identification of gaskets 11 7.3 Pre-conditioning of th
13、e gaskets 11 7.4 Dimensions of test gaskets . 11 7.5 Measurement of test gaskets as received 12 7.6 Influence of gasket dimensions 12 8 Test procedures 13 8.1 General . 13 8.2 Testing Strategy 13 8.3 Reference gasket thickness 13 8.4 Compression curve 13 8.5 Determination of Qsmax14 8.6 Determinatio
14、n of the values of EG. 17 8.7 Determination of PQRand eGc. 19 8.8 Determination of Qmin(L)and Qsmin(L). 19 8.9 Determination of Qsmin(L)at elevated temperatures . 22 8.10 Determination of axial coefficient of thermal expansion 22 8.11 Determination of the coefficient of static friction 23 9 Report d
15、etails 23 Annex A (informative) Generalised test rig schematic . 24 Annex B (informative) Test rig schematic for compression and compression creep tests . 25 Annex C (informative) Test rig schematic for ambient temperature leakage measurement 26 Annex D (informative) Schematic of leakage rig allowin
16、g use of interchangeable face plate . 27 Annex E (informative) Transferability of measured leakage rates to service conditions . 28 BS EN 13555:2014EN 13555:2014 (E) 3 Annex F (informative) The measurement of the sealing parameter Qsmin(L)after long term service simulating exposure to elevated tempe
17、rature 29 Figure F.1 The measurement of sealing parameters of heat aged gaskets . 29 Annex G (informative) Determination of the sealing characteristics of strip sealing materials available in coil form . 31 Annex H (informative) Proposed method for the determination of the coefficient of static fric
18、tion, nullG, of gaskets 32 Bibliography 34 BS EN 13555:2014EN 13555:2014 (E) 4 Foreword This document (EN 13555:2014) 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
19、 standard, either by publication of an identical text or by endorsement, at the latest by October 2014, and conflicting national standards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent r
20、ights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13555:2004. In comparison to EN 13555:2004 the following changes have been made: a) in Clause 3 the list of definitions has been revised; b) in Clause 4 the list of symb
21、ols has been revised; c) a new sub-clause 6.3 with testing requirements for metal foils has been added; d) sub-clause 6.4 on surface finish has been revised; e) sub-clauses 7.2 and 7.3 on test gaskets have been revised; f) Clause 8 including Figure 1a) to Figure 6 on testing procedures has been comp
22、letely revised; g) in Clause 9 the report details have been revised; h) Annex F on relationship of gasket parameters in EN 13555 with those from PVRC method has been revised; i) a new informative Annex G on determination of the sealing characteristics of strip sealing materials available in coil for
23、m has been added; j) a new informative Annex H on the proposed method for the determination of the coefficient of static friction of gaskets has been added. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this
24、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, Norway, Poland, Portugal, Romania, Slovakia,
25、 Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13555:2014EN 13555:2014 (E) 5 Introduction This document provides the test procedures to allow the generation of the gasket parameters to enable the design equations established in EN 1591-1 to be employed. The same test pro
26、cedures may be used for “Type Testing” of gaskets and gasket materials. These procedures are not for routine quality control purposes. BS EN 13555:2014EN 13555:2014 (E) 6 1 Scope This European Standard specifies the gasket parameters required by EN 1591-1 and provides the test procedures for establi
27、shing the values of these parameters. Gaskets which are wholly based upon elastomers, or based upon elastomers with only the inclusion of particulate fillers or particulate reinforcement, as opposed to gaskets combining elastomers, fillers and fibrous reinforcement, are beyond the scope of this docu
28、ment. NOTE The testing procedures given might be applicable to gaskets of other shapes and dimensions. 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 ci
29、ted applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1092 (all parts), Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated EN 1514-1, Flanges and their joints - Dimensions of gaskets
30、 for PN-designated flanges - Part 1: Non-metallic flat gaskets with or without inserts EN 1514-2, Flanges and their joints - Gaskets for PN-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges EN 1514-3, Flanges and their joints - Dimensions of gaskets for PN-designated flang
31、es - Part 3: Non-metallic PTFE envelope gaskets EN 1514-4, Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges EN 1514-6, Flanges and their joints - Dimensions of gaskets for
32、PN-designated flanges - Part 6: Covered serrated metal gaskets for use with steel flanges EN 1514-7, Flanges and their joints - Gaskets for PN-designated flanges - Part 7: Covered metal jacketed gaskets for use with steel flanges EN 1591-1, Flanges and their joints - Design rules for gasketed circul
33、ar flange connections - Part 1: Calculation EN 1759 (all parts), Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, Class designated EN 12560-1, Flanges and their joints - Gaskets for Class-designated flanges - Part 1: Non-metallic flat gaskets with or without in
34、serts EN 12560-2, Flanges and their joints - Dimensions of gaskets for Class-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges EN 12560-3, Flanges and their joints - Gaskets for Class-designated flanges - Part 3: Non-metallic PTFE envelope gaskets EN 12560-4, Flanges and t
35、heir joints - Gaskets for Class-designated flanges - Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges BS EN 13555:2014EN 13555:2014 (E) 7 EN 12560-5, Flanges and their joints - Gaskets for Class-designated flanges - Part 5: Metallic ring joint gaske
36、ts for use with steel flanges EN 12560-6, Flanges and their joints - Gaskets for Class-designated flanges - Part 6: Covered serrated metal gaskets for use with steel flanges EN 12560-7, Flanges and their joints - Gaskets for Class-designated flanges - Part 7: Covered metal jacketed gaskets for use w
37、ith steel flanges 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Qsmaxthe maximum surface pressure that may be imposed on the gasket at the indicated temperatures without collapse or “crash”, compressive failure, unacceptable intrusion into
38、the bore or damage of the stressed area of the gasket such that failure was imminent 3.2 Qmin(L)the minimum gasket surface pressure on assembly required at ambient temperature in order to seat the gasket into the flange facing roughness and close the internal leakage channels so that the tightness c
39、lass is to the required level L for the internal test pressure 3.3 Qsmin(L)the minimum gasket surface pressure required under the service pressure conditions, (i.e.) after off loading and at the service temperature, so that the required tightness class L is maintained for the internal test pressure
40、3.4 LNthe tightness classes are defined in Table 1 in terms of specific leak rates. Additional, better, tightness classes can be introduced as required by continuing the series Table 1 Tightness classes Tightness class LNL1,0L0,1L0,01Specific leak rate mg s- 1m- 1 1,0 0,1 0,01 3.5 PQRthis factor to
41、allows for the effect on the imposed load of the relaxation of the gasket between the completion of bolt up and long term experience of the service temperature 3.6 EGthis is the unloading modulus of elasticity and it is determined from the thickness recovery of the gasket between the initial compres
42、sion surface pressure and unloading to a third of this initial surface pressure 3.7 Gthis is the coefficient of thermal expansion of the gasket under the service conditions of temperature and gasket surface pressure in the axial direction BS EN 13555:2014EN 13555:2014 (E) 8 3.8 eGcthis is the additi
43、onal change in thickness of the gasket or sealing element due to creep between the completion of the loading and the end of the test period 3.9 Gthis is the static friction factor between the gasket and the flange facing during service conditions and under external loading 4 Symbols For the purposes
44、 of this document, the following notations apply. Where units are applicable, they are shown in brackets. Where units are not applicable, no indication is given. Gthe axial coefficient of thermal expansion of gasket K- 1 Gthe static friction factor between the gasket and the flange facing eGgasket o
45、r sealing element thickness mm eGcchange in gasket or sealing element thickness due to creep mm AGarea of gasket subjected to surface pressure mm2 d internal diameter of gasket mm dsinternal diameter of area of gasket subjected to surface pressure mm D external diameter of gasket mm Dsexternal diame
46、ter of area of gasket subjected to surface pressure mm EGunloading modulus of elasticity of the gasket MPa LNtightness class subscript N indicates the maximum specific leakage rate for that tightness class mg s- 1m- 1 PQRcreep relaxation factor, the ratio of the residual and initial surface pressure
47、s Q surface pressure MPa QAgasket surface pressure at assembly prior to unloading MPa Qmin(L)the minimum level of surface pressure required for leakage rate class L on assembly MPa Qsmin(L)the minimum level of surface pressure required for leakage rate class L after off-loading MPa Qsmaxthe maximum
48、surface pressure that can be safely imposed upon the gasket at the service temperature without damage MPa BS EN 13555:2014EN 13555:2014 (E) 9 Concordance with EN 1591-1: QA, the gasket surface pressure at assembly is the gasket stress at the load situation 0 and is defined by QAin EN 1591-1. 5 List
49、of gasket parameters The gasket parameters relevant to the calculation procedures for the design of bolted flange connections as given in EN 1591-1 are shown in Table 2 together with the test procedures applicable for determining the value of the parameter in each case. Table 2 Gasket parameters and test procedures Gasket parameter Definition Subclause Test procedure(s) Subclause Qsmax3.1 8.5 Qmin(L)3.2 8.8 Qsmin(L)3.3 8.8 and 8.9 LN3.4 8.8 and 8.9 PQR3.5 8.7 EG3.6 8.6 G3.7 8.10 eGc3.8 8.7 G3.9 8.11 6 Test equip
