1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1555-4:2011Plastics piping systems forthe supply of gaseous fuels Polyethylene (PE)Part 4: ValvesBS EN 1555-4:2011 BRITISH STANDARDNational forewordThis British Standard is
2、 the UK implementation of EN 1555-4:2011. Itsupersedes BS EN 1555-4:2002 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/88/2, Plastics piping for pressure applications.A list of organizations represented on this committee can beobtained on request
3、to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 64874 8ICS 23.060.99; 91.140.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This Britis
4、h Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2011.Amendments issued since publicationDate Text affectedBS EN 1555-4:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1555-4 May 2011 ICS 91.140.40; 23.060.99 Supersedes EN 1555-4:2002Engli
5、sh Version Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves Systmes de canalisations en plastique pour la distribution de combustibles gazeux - Polythylne (PE) - Partie 4 : Robinets Kunststoff-Rohrleitungssysteme fr die Gasversorgung - Polyethylen (PE) - T
6、eil 4: Armaturen This European Standard was approved by CEN on 17 March 2011. 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 bibl
7、iographical 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 any other language made by translation under the respon
8、sibility 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 Republic, Denmark, Estonia, Finland, France, Germany, Gre
9、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Managem
10、ent Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1555-4:2011: EBS EN 1555-4:2011EN 1555-4:2011 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms
11、and definitions, symbols and abbreviations .64 Material .84.1 PE compound .84.2 Material for non-polyethylene parts .85 General characteristics .95.1 Appearance of the valve .95.2 Colour .95.3 Design .96 Geometrical characteristics . 106.1 General . 106.2 Measurement of dimensions . 106.3 Dimensions
12、 of spigot ends for valves 106.4 Dimensions of valves with electrofusion sockets . 106.5 Dimensions of the operating device . 107 Mechanical characteristics of assembled valves 117.1 General . 117.2 Requirements 118 Physical characteristics . 158.1 Conditioning 158.2 Requirements 159 Performance req
13、uirements 1610 Marking 1610.1 General . 1610.2 Minimum required marking 1610.3 Additional marking . 1711 Delivery conditions . 17Annex A (normative) Determination of the leaktightness of seat and packing . 18A.1 General . 18A.2 Test method . 18BS EN 1555-4:2011EN 1555-4:2011 (E) 3 Foreword This docu
14、ment (EN 1555-4:2011) has been prepared by Technical Committee CEN/TC 155 “Plastics piping systems and ducting systems”, the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
15、the latest by November 2011, and conflicting national standards shall be withdrawn at the latest by November 2011. 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 responsible for identifying an
16、y or all such patent rights. This document supersedes EN 1555-4:2002. It has been prepared in liaison with Technical Committee CEN/TC 234 “Gas infrastructure“. System Standards are based on the results of the work undertaken in ISO/TC 138 “Plastics pipes, fittings and valves for the transport of flu
17、ids“, which is a Technical Committee of the International Organization for Standardization (ISO). They are supported by separate standards on test methods to which references are made throughout the System Standard. The System Standards are consistent with general standards on functional requirement
18、s and on recommended practice for installation. EN 1555 consists of the following parts: EN 1555-1, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 1: General; EN 1555-2, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 2: Pipes; EN 1555-3
19、, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings; EN 1555-4, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 4: Valves (this standard); EN 1555-5, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part
20、 5: Fitness for purpose of the system; CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 7: Guidance for the assessment of conformity. NOTE EN 12007-2:2000 1 prepared by CEN/TC 234 “Gas infrastructure” deals with the recommended practice for installation o
21、f plastics pipes system in accordance with EN 1555 (all parts). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Esto
22、nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1555-4:2011EN 1555-4:2011 (E) 4 Introduction The System Standard
23、, of which this is Part 4, specifies the requirements for a piping system and its components made from polyethylene (PE) and which is intended to be used for the supply of gaseous fuels. Requirements and test methods for material and components, other than valves, are specified in EN 1555-1, EN 1555
24、-2 and EN 1555-3. Characteristics for fitness for purpose are covered in EN 1555-5. CEN/TS 1555-7 2 gives guidance for assessment of conformity. Recommended practice for installation is given in EN 12007-2:2000 1 prepared by CEN/TC 234. This part of EN 1555 covers the characteristics of valves. BS E
25、N 1555-4:2011EN 1555-4:2011 (E) 5 1 Scope This part of EN 1555 specifies the characteristics of valves made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels. NOTE 1 Valves made from other material than polyethylene designed for the supply of gaseous fuels conform
26、ing to the relevant standards are permitted to be used in PE piping system according to EN 1555 provided they have relevant PE connection for butt fusion or electrofusion ends (see EN 1555-3). It also specifies the test parameters for the test methods referred to in this standard. In conjunction wit
27、h Parts 1, 2, 3 and 5 of EN 1555, it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure, MOP, up to and including 10 bar 1); b) an operating temperature of 20 C as refere
28、nce temperature; NOTE 2 For other operating temperatures, derating coefficients should be used, see EN 1555-5. c) an operating temperature between -20 C and +40 C. EN 1555 (all parts) covers a range of maximum operating pressures and gives requirements concerning colours and additives. NOTE 3 It is
29、the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. It is applicable to bi-directional valves with spigot end or electrofus
30、ion socket intended to be fused with PE pipes conforming to EN 1555-2 without any fittings or with PE fittings conforming to EN 1555-3. This European Standard covers valves for pipes with a nominal outside diameter dn 315 mm. 2 Normative references The following referenced documents are indispensabl
31、e for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 682, Elastomeric Seals Materials requirements for seals used in pipes and fittings carrying gas a
32、nd hydrocarbon fluids EN 736-1:1995, Valves Terminology Part 1: Definition of types of valves EN 736-2:1997, Valves Terminology Part 2: Definition of components of valves EN 744:1995, Plastics piping and ducting systems Thermoplastics pipes Test method for resistance to external blows by the round-t
33、he-clock method EN 1555-1:2010, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 1: General EN 1555-2, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 2: Pipes 1) 1 bar = 0,1 MPa. BS EN 1555-4:2011EN 1555-4:2011 (E) 6 EN 1555-3:2010, Plast
34、ics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings EN 1555-5, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 5: Fitness for purpose of the system EN 1680, Plastics piping systems Valves for polyethylene (PE) piping systems Test metho
35、d for leaktightness under and after bending applied to the operating mechanisms EN 1704, Plastics piping systems Thermoplastics valves Test method for the integrity of a valve after temperature cycling under bending EN 1705, Plastics piping systems Thermoplastics valves Test method for the integrity
36、 of a valve after an external blow EN 12100, Plastics piping systems Polyethylene (PE) valves Test method for resistance to bending between supports EN 12117, Plastics piping systems Fittings, valves and ancillaries Determination of gaseous flow rate/pressure drop relationships EN 12119, Plastics pi
37、ping systems Polyethylene (PE) valves Test method for resistance to thermal cycling EN 28233, Thermoplastic valves Torque Test method (ISO 8233:1988) EN ISO 1133, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (ISO 1133:2005) EN ISO 1167
38、-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method (ISO 1167-1:2006) EN ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to in
39、ternal pressure Part 4: Preparation of assemblies (ISO 1167-4:2007) EN ISO 3126, Plastics piping systems Plastics components Determination of dimensions (ISO 3126:2005) ISO 10933, Polyethylene (PE) valves for gas distribution systems ISO 11357-6, Plastics Differential scanning calorimetry (DSC) Part
40、 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) 3 Terms and definitions, symbols and abbreviations For the purposes of this document, the terms and definitions, symbols and abbreviations given in EN 1555-1:2010, EN 736-1:1995, EN 736-2
41、:1997 and the following apply. 3.1 external leaktightness leaktightness of the valve body enveloping the space containing the gas, with respect to the atmosphere 3.2 internal leaktightness leaktightness between the inlet and the outlet of the valve, with the valve in the closed position BS EN 1555-4
42、:2011EN 1555-4:2011 (E) 7 3.3 leaktightness test test for both of the following characteristics: a) the internal leaktightness of a valves closing seat when closed and pressurized from either side; b) the external leaktightness of a valve when half open 3.4 initiating torque torque required to initi
43、ate movement of the obturator 3.5 running torque torque required to achieve full opening or closing of the valve at maximum allowable operating pressure 3.6 leakage emission of gas from a valve body, or any component of a valve 3.7 valve body main part of a valve which contains the obturating device
44、 (closing element, the seat, the packing seals and the operating stop), as applicable and provides the terminal ends for connection to the PE pipe/fittings 3.8 operating device part of a valve for connection with the operating key which allows the opening and the closing of the valve 3.9 Terms relat
45、ing to design 3.9.1 full bore valve valve with a flow section equal to or greater than 80 % of the section corresponding to the nominal inside diameter of the body end port EN 736-3:2008 3.9.2 clearway valve valve designed to have an unobstructed flow way, which allows for the passage of a theoretic
46、al sphere with a diameter that is not less than the nominal inside diameter of the body end port EN 736-3:2008 3.9.3 reduced bore valve valve with a flow section equal to or greater than 36 % of the section corresponding to the nominal inside diameter of the body end port and which does not correspo
47、nd to the full bore valve EN 736-3:2008 BS EN 1555-4:2011EN 1555-4:2011 (E) 8 4 Material 4.1 PE compound The PE compound from which the valve body with spigot or electrofusion socket is made shall conform to EN 1555-1. The PE components of the valve shall be made only from virgin material conforming
48、 to EN 1555-1. 4.2 Material for non-polyethylene parts 4.2.1 General All components shall conform to the relevant EN standard(s). Alternative standards may be applied in cases where the suitable EN standard(s) do not exist provided a fitness for purpose of the components shall be demonstrated. The m
49、aterials and the constituent elements used in making the valve (including elastomers, greases and any metal parts as may be used) shall be as resistant to the external and internal environments as the other elements of the piping system and shall have a life expectancy under the following conditions at least equal to that of t
