1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 295-1:2013Vitrified clay pipe systems for drains and sewersPart 1: Requirements for pipes, fittings and jointsBS EN 295-1:2013 BRITISH STANDARDNational forewordThis British
2、 Standard is the UK implementation of EN 295-1:2013. It supersedes BS EN 295-1:1991 and, together with BS EN 295-2:2013, BS EN 295-4:2013, BS EN 295-5:2013, BS EN 295-6:2013, and BS EN 295-7:2013, it supersedes BS EN 295-10:2005, which is withdrawn.The UK participation in its preparation was entrust
3、ed to Technical Committee B/505, Wastewater engineering.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The Br
4、itish Standards Institution 2013. Published by BSI Standards Limited 2013.ISBN 978 0 580 70646 2 ICS 23.040.50; 91.140.80; 93.030 Compliance with a British Standard cannot confer immunityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and Strate
5、gy Committee on 28 February 2013.Amendments issued since publicationDate Text affectedBS EN 295-1:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 295-1 February 2013 ICS 93.030 Supersedes EN 295-1:1991, EN 295-10:2005English Version Vitrified clay pipe systems for drains and sewers - Part 1
6、: Requirements for pipes, fittings and joints Systmes de tuyaux et accessoires en grs pour les rseaux de branchement et dassainissement - Partie 1: Exigences pour tuyaux, accessoires et assemblages Steinzeugrohrsysteme fr Abwasserleitungen und -knale -Teil 1: Anforderungen an Rohre, Formstcke und Ve
7、rbindungen This European Standard was approved by CEN on 1 December 2012. 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 bibliogr
8、aphical 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 responsibi
9、lity 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, Former Yugoslav Republic
10、 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISA
11、TION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 295-1:2013: EBS EN 295-1:2013EN 295-1:2013 (E) 2 Contents Page Foreword . 4 1 Scope 6 2 N
12、ormative references . 6 3 Terms and definitions 6 4 Symbols and abbreviations . 7 4.1 Symbols 7 4.2 Abbreviations . 7 5 Requirements for pipes and fittings 8 5.1 Materials, manufacture, water absorption and appearance . 8 5.2 Internal diameter 8 5.3 Length . 9 5.4 Squareness of ends . 9 5.5 Deviatio
13、n from straightness 9 5.6 Water seal of trapped fittings 9 5.7 Angle of curvature and radius of bends 10 5.8 Branch angle of junctions 10 5.9 Crushing strength (FN) 10 5.10 Bending tensile strength 12 5.11 Bending moment resistance (BMR). 12 5.12 Bond strength of adhesive used for fixing fired clay
14、parts together . 12 5.13 Fatigue strength under cyclic load 13 5.14 Watertightness of pipes and junctions 13 5.15 Chemical resistance . 13 5.16 Hydraulic roughness 13 5.17 Abrasion resistance . 13 5.18 Airtightness 13 5.19 Tightness of fittings . 14 5.20 Resistance against high pressure water jettin
15、g . 14 6 Requirements for joints and joint assemblies 15 6.1 Joint materials 15 6.2 Watertightness of joint assemblies under deflection and shear load . 16 6.3 Continuity of invert in joint assemblies 17 6.4 Joint interchangeability of pipes and fittings in joint assemblies . 17 6.5 Chemical and phy
16、sical resistance to effluent of joint assemblies . 19 6.6 Thermal cycling stability of joint assemblies . 20 6.7 Long-term thermal stability of joint assemblies . 20 7 Common requirements for pipes, fittings and joints 20 7.1 Reaction to fire . 20 7.2 Durability 20 7.3 Dangerous substances 21 8 Desi
17、gnation 21 9 Marking . 21 9.1 Pipes and fittings . 21 9.2 Joints 22 10 Evaluation of conformity 22 10.1 General . 22 10.2 Initial type testing . 22 BS EN 295-1:2013EN 295-1:2013 (E) 3 10.3 Factory production control (FPC) 22 Annex A (normative) Requirements for vitrified clay fittings 23 Annex B (in
18、formative) Guidance on design, installation and operation of sewers and drains constructed from vitrified clay pipes . 24 B.1 General . 24 B.2 Hydraulic design 24 B.3 Structural design 24 B.4 Installation 24 B.5 Operation and maintenance . 24 B.6 Economy . 25 B.7 Environmental characteristics . 25 A
19、nnex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 26 ZA.1 Scope and relevant characteristics . 26 ZA.2 Procedures for the attestation of conformity of vitrified clay pipes, fittings and pipe joints . 28 ZA.3 CE marking . 29
20、Bibliography 34 BS EN 295-1:2013EN 295-1:2013 (E) 4 Foreword This document (EN 295-1:2013) has been prepared by Technical Committee CEN/TC 165 “Wastewater engineering”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publica
21、tion of an identical text or by endorsement, at the latest by August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013. 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 shal
22、l not be held responsible for identifying any or all such patent rights. This document supersedes EN 295-1:1991 and together with EN 295-2:2013, EN 295-4:2013, EN 295-5:2013, EN 295-6:2013 and EN 295-7:2013 it supersedes EN 295-10:2005. This document has been prepared under a mandate given to CEN by
23、 the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. The main changes with respect to the previous edition are listed belo
24、w: a) new dimensions included in Table 13 and Table 14 and dimensions for products no longer manufactured deleted; b) requirements for the resistance to high pressure water jetting added; c) requirements for water absorption added; d) reaction to fire added; e) Annex ZA added; f) editorially revised
25、. The standard series EN 295 “Vitrified clay pipe systems for drains and sewers“ consists of the following parts: Part 1: Requirements for pipes, fittings and joints (the present document) Part 2: Evaluation of conformity and sampling Part 3: Test methods Part 4: Requirements for adaptors, connector
26、s and flexible couplings Part 5: Requirements for perforated pipes and fittings Part 6: Requirements for components of manholes and inspection chambers Part 7: Requirements for pipes and joints for pipe jacking Guidance on design, installation and operation of sewers and drains constructed from vitr
27、ified clay pipes is given in EN 295-1:2013, Annex B. BS EN 295-1:2013EN 295-1:2013 (E) 5 According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czec
28、h 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, Spain, Sweden, Switzerland, Turkey and the United Kingdom
29、. BS EN 295-1:2013EN 295-1:2013 (E) 6 1 Scope This European Standard specifies requirements for vitrified clay pipes, fittings and flexible joints for buried drain and sewer systems for the conveyance of wastewater (including domestic wastewater, surface water and rainwater) under gravity and period
30、ic hydraulic surcharge or under continuous low head of pressure. This standard also specifies requirements for rubber, polyurethane and polypropylene materials and other components used for jointing clay pipes and fittings. This standard specifies different strength classes, systems of joint dimensi
31、ons, lengths and fittings. NOTE 1 The specifiers/purchasers can select them according to their requirements. This standard does not apply to special fittings, adaptors and compatible accessories, perforated pipes and fittings, manholes and inspection chambers and pipes and joints for pipe jacking, w
32、hich are specified in other parts of the standard series EN 295. NOTE 2 Corresponding provisions for the evaluation of conformity (ITT and FPC) and sampling and those for the test methods are further specified in EN 295-2 and EN 295-3, respectively. 2 Normative references The following documents, in
33、 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 any amendments) applies. EN 295-2:2013, Vitrified clay pipe
34、 systems for drains and sewers Part 2: Evaluation of conformity and sampling EN 295-3:2012, Vitrified clay pipe systems for drains and sewers Part 3: Test methods EN 681-1, Elastomeric seals Material requirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber
35、EN 681-4, Elastomeric seals Material requirements for pipe joint seals used in water and drainage applications Part 4: Cast polyurethane sealing elements EN 1610:1997, Construction and testing of drains and sewers 3 Terms and definitions For the purposes of this document, the following terms and def
36、initions apply. 3.1 nominal size DN numerical designation of size which is a convenient round number equal to or approximately equal to the internal diameter in millimetres 3.2 curvature angle subtended by the length of a curved fitting at the centre of a circle of nominal radius through the centrel
37、ine of the fitting BS EN 295-1:2013EN 295-1:2013 (E) 7 3.3 joint assembly adjacent ends of pipes, fittings or adaptors and the means of joining them 3.4 joint system dimensions of a joint related to spigot or socket Note 1 to entry: Joint systems C, D and I are related to internal diameters of socke
38、ts, and joint systems E to H are related to the spigot outside diameters. 3.5 sealing element factory made component which seals the joint 3.6 fairing any component located within a joint to reduce dimensional tolerances of sealing surfaces 3.7 minimum internal diameter smallest internal diameter me
39、asured within 100 mm of the ends of the pipe 3.8 pipe section short length of pipe barrel equal to or greater than 300 mm 3.9 nominal length numerical designation of length approximately equal to the internal length of the pipe barrel 4 Symbols and abbreviations 4.1 Symbols FNcrushing strength, in k
40、N/m FSshear load, in kN d3 spigot outside diameter, in mm d4internal diameter of socket or fairing, in mm p0initial air pressure, in kPa p pressure drop, in kPa W15 water addition needed to maintain watertightness test pressure, in l/m24.2 Abbreviations BMR bending moment resistance CWT classified w
41、ithout the need for testing BS EN 295-1:2013EN 295-1:2013 (E) 8 5 Requirements for pipes and fittings 5.1 Materials, manufacture, water absorption and appearance 5.1.1 Materials Pipes and fittings shall be made from suitable natural clays to enable the pipe body to be fired to vitrification that is
42、with a glass matrix, so that the final product is in accordance with this standard. 5.1.2 Manufacture Pipes and fittings shall be sound and shall be free from such defects as would impair their function when in service. NOTE Pipes and fittings are regarded as rigid (stiff) and the joints as flexible
43、; all have high corrosion resistance. Fittings may be completed by fixing fired parts together. Products may be surface treated after firing. Applicable dimensional and performance requirements for fittings shall be as specified in Annex A. 5.1.3 Water absorption Pipes and fittings shall have a wate
44、r absorption value of less than 6 % when tested in accordance with EN 295-3:2012, Clause 28. 5.1.4 Appearance Pipes and fittings can be unglazed or glazed on the interior and/or exterior. When glazed they need not be glazed on the jointing surfaces of the spigot and/or socket. Visual imperfections,
45、such as missing glaze, unevenness, creasings in the transition from pipe to socket and slight surface damage are acceptable, providing the impermeability, durability and flow characteristics of the pipes and fittings are unaffected. 5.2 Internal diameter The internal diameter shall not be less than
46、the values given in Table 1. Table 1 Internal diameter Nominal size DN Minimum internal diameter mm Nominal size DN Minimum internal diameter mm 100 96 450 439 125 121 500 487 150 146 600 585 200 195 700 682 225 219 800 780 250 244 900 878 300 293 1 000 975 350 341 1 200 1 170 400 390 1 400 1 365 BS
47、 EN 295-1:2013EN 295-1:2013 (E) 9 Other nominal sizes can be manufactured to comply with this standard, providing that the minimum internal diameter shall be not less than 97,5 % of the nominal size, rounded to the nearest whole millimetre. 5.3 Length The preferred nominal lengths of pipes of DN 200
48、 and greater shall be either in accordance with Table 2 or in whole multiples of 0,25 m. There are no preferred nominal lengths for DN 100, DN 125 and DN 150 pipes or straight fittings. Table 2 Preferred nominal lengths Nominal size DN Preferred nominal lengths m 200 1,5 2,0 2,5 225 1,5 1,75 2,0 250
49、 1,5 2,0 2,5 300 1,5 2,0 2,5 350 1,5 2,0 2,5 3,0 NOTE Lengths of 1,0 m, 1,6 m and 1,85 m are also preferred for the range DN 200 to DN 450. The length shall be measured to the nearest whole millimetre. The tolerance on the declared nominal length of pipes and straight fittings shall be from 1 % to + 4 %, or 10 mm, whichever is the larger. 5.4 Squareness of ends When tested in accordance with EN 295-3:2012, 5.1, the deviation from squareness measured at the ends of pipes and straight fittings shall be not great
