1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 295-7:2013Vitrified clay pipe systems for drains and sewersPart 7: Requirements for pipes and joints for pipe jackingBS EN 295-7:2013 BRITISH STANDARDNational forewordThis
2、British Standard is the UK implementation of EN 295-7:2013. It supersedes BS EN 295-7:1996 and, together with BS EN 295-1:2013, BS EN 295-2:2013, BS EN 295-4:2013, BS EN 295-5:2013, and BS EN 295-6:2013, it supersedes BS EN 295-10:2005, which is withdrawn.The UK participation in its preparation was
3、entrusted 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.
4、 The British Standards Institution 2013. Published by BSI Standards Limited 2013.ISBN 978 0 580 70652 3 ICS 23.040.50; 91.140.80; 93.030Compliance with a British Standard cannot confer immunityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and
5、Strategy Committee on 28 February 2013.Amendments issued since publicationDate Text affected BS EN 295-7:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 295-7 February 2013 ICS 93.030 Supersedes EN 295-10:2005, EN 295-7:1995English Version Vitrified clay pipe systems for drains and sewers -
6、 Part 7: Requirements for pipes and joints for pipe jacking Systmes de tuyaux et accessoires en grs pour les rseaux de branchement et dassainissement - Partie 7: Exigences pour les tuyaux et leurs assemblages destins au fonage Steinzeugrohrsysteme fr Abwasserleitungen und -knale -Teil 7: Anforderung
7、en an Rohre und Verbindungen fr Rohrvortrieb 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 alterat
8、ion. 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 any other language made b
9、y 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 Republic, Denmark, Estonia,
10、 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. EUROPEAN COMMITTEE FOR STANDARD
11、IZATION COMIT EUROPEN DE NORMALISATION 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 295-7:2013: EBS EN 295-7:2013EN 295-7:2013 (E) 2 Conten
12、ts Page Foreword . 4 1 Scope 62 Normative references . 6 3 Terms and definitions 6 4 Requirements for pipes for pipe jacking . 6 4.1 Materials, manufacture, water absorption and appearance . 6 4.2 Dimensions. 7 4.2.1 General . 7 4.2.2 Internal diameter 7 4.2.3 Tolerance on the declared internal diam
13、eter 7 4.2.4 Continuity of invert 8 4.2.5 External diameter . 8 4.2.6 Length . 9 4.2.7 Squareness of ends . 9 4.2.8 Deviation from straightness 9 4.3 Strength 9 4.3.1 Crushing strength (FN) 9 4.3.2 Bending tensile strength 10 4.3.3 Compressive strength 10 4.3.4 Jacking strength 10 4.3.5 Maximum work
14、ing jacking load . 11 4.3.6 Fatigue strength under cyclic load 11 4.4 Watertightness . 11 4.5 Airtightness 11 4.6 Chemical resistance . 12 4.7 Hydraulic roughness 12 4.8 Abrasion resistance . 12 4.9 Resistance against high pressure water jetting . 13 5 Requirements for joints for pipe jacking . 13 5
15、.1 Joint materials 13 5.1.1 Rubber sealing elements . 13 5.1.2 Polyurethane sealing elements . 13 5.1.3 Stainless steel sleeves . 13 5.1.4 Polypropylene sleeve couplings . 13 5.1.5 Other materials . 13 5.2 Load transfer rings . 13 5.3 Watertightness of joints under deflection and shear load . 14 5.3
16、.1 General . 14 5.3.2 Test pressures 14 5.4 Angular deflection 14 5.5 Shear resistance 14 5.6 Chemical and physical resistance to effluent . 14 5.7 Thermal cycling stability 15 5.8 Long-term thermal stability . 15 6 Common requirements for pipes and joints . 15 6.1 Reaction to fire . 15 6.2 Durabili
17、ty 15 6.3 Dangerous substances 16 7 Designation 16 BS EN 295-7:2013EN 295-7:2013 (E) 3 8 Marking . 16 9 Evaluation of conformity 17 9.1 General . 17 9.2 Initial type testing . 17 9.3 Factory production control (FPC) 17 Annex ZA (informative) Clauses of this European Standard addressing the provision
18、s of the EU Construction Products Directive . 18 ZA.1 Scope and relevant characteristics . 18 ZA.2 Procedures for the attestation of conformity of vitrified clay pipes and joints for pipe jacking 20 ZA.2.1 Systems of attestation of conformity 20 ZA.2.2 EC declaration of conformity . 21 ZA.3 CE marki
19、ng . 21 ZA.3.1 General . 21 ZA.3.2 CE marking on the product 21 ZA.3.3 CE marking in the accompanying documents 22 Bibliography 25 BS EN 295-7:2013EN 295-7:2013 (E) 4 Foreword This document (EN 295-7:2013) has been prepared by Technical Committee CEN/TC 165 “Wastewater engineering”, the secretariat
20、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 August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013. Attention is drawn to the
21、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 any or all such patent rights. This document supersedes EN 295-7:1995 and together with EN 295-1:2013, EN 295-2:2013, EN 295-4:2013, EN 295-5:2
22、013 and EN 295-6:2013 it supersedes EN 295-10:2005. This document has been prepared under a mandate given to CEN by 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
23、, which is an integral part of this document. The main changes with respect to the previous edition are listed below: nominal sizes DN 900, DN 1 200 and DN 1 400 added; requirements for the determination of jacking strength changed; requirements for the resistance to high pressure water jetting adde
24、d; requirements for water absorption added; reaction to fire added; Annex ZA added; editorially revised. 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 Part 2: Evaluation of conformit
25、y and sampling Part 3: Test methods Part 4: Requirements for adaptors, connectors 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 (the pres
26、ent document) 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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni
27、a, France, Germany, Greece, BS EN 295-7:2013EN 295-7:2013 (E) 5 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 295-7:2013EN 295-7:2013 (E) 6 1
28、 Scope This European Standard specifies requirements for vitrified clay pipes and joints for pipe jacking for buried drain and sewer systems for the conveyance of wastewater (including domestic wastewater, surface water and rainwater) under gravity and periodic hydraulic surcharge or under continuou
29、s low head of pressure. Pipe jacking techniques include micro-tunnelling, pipe-eating, pipe bursting and where appropriate lining with discrete pipes. This standard also specifies requirements for rubber, polyurethane, polypropylene, stainless steel and other materials used for joints for pipe jacki
30、ng. NOTE 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 whole or in part, are normatively referenced in this document
31、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 295-1:2013, Vitrified clay pipe systems for drains and sewers Part 1: Requirements for pipes,
32、fittings and joints EN 295-2:2013, Vitrified clay pipe 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 312, Particleboards Specifications EN 681-1, Elastomeric seals Materials require
33、ments for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber EN 681-4, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 4: Cast polyurethane sealing elements EN 10088-2:2005, Stainless steels Part 2: Technical
34、delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 295-1:2013 and the following apply. 3.1 jacking strength declared capacity of the pipe to carry axial load
35、 without taking site conditions into account 3.2 maximum working jacking load calculated allowable axial load on the pipe during construction, taking site conditions into account 4 Requirements for pipes for pipe jacking 4.1 Materials, manufacture, water absorption and appearance For material, manuf
36、acture, water absorption and appearance, jacking pipes shall comply with EN 295-1:2013, 5.1. BS EN 295-7:2013EN 295-7:2013 (E) 7 4.2 Dimensions 4.2.1 General Relevant dimensions of pipes or pipe sections shall be measured after grinding or cutting of ends. 4.2.2 Internal diameter The internal diamet
37、er shall not be less than the values given in Table 1. Table 1 Internal diameter Nominal size DN Minimum internal diameter mm 100 96 150 146 200 195 225 219 250 244 300 293 400 390 500 487 600 585 700 682 800 780 900 878 1 000 975 1 200 1 170 1 400 1 365 Other nominal sizes can be manufactured to co
38、mply with this standard, provided that the minimum internal diameter shall be not less than 97,5 % of the nominal size, rounded to the nearest whole mm. 4.2.3 Tolerance on the declared internal diameter The internal diameter of a pipe shall not deviate from the manufacturers declared value by an amo
39、unt greater than the tolerance given in Table 2. BS EN 295-7:2013EN 295-7:2013 (E) 8 Table 2 Tolerance on internal diameter Nominal size DN Tolerance on declared internal diameter mm 300 5 400 6 500 7,5 600 9 700 12 800 12 900 12 1 000 15 1 200 18 1 400 30 4.2.4 Continuity of invert The calculated d
40、ifference in invert levels between pipes shall not exceed the values given in Table 3, when measured in accordance with EN 295-3:2012, Clause 22. If it is necessary for achieving continuity of invert, the pipe shall be marked. Table 3 Continuity of invert Nominal size DN Continuity of invert mm 400
41、4 400 0,01 x DN 4.2.5 External diameter The external diameter of the barrel of a pipe shall not deviate from the manufacturers declared value by an amount greater than the tolerance given in Table 4. BS EN 295-7:2013EN 295-7:2013 (E) 9 Table 4 Tolerance on external diameter Nominal size DN Tolerance
42、 on declared external diameter mm 300 010400 012500 015600 018700 024800 024900 0281 000 0301 200 0361 400 0604.2.6 Length Lengths of pipes are not specified in this standard. The length shall be measured at 90 intervals around the circumference and the average value calculated. The tolerance on the
43、 measured average length shall be 2 mm on the manufacturers declared nominal length. 4.2.7 Squareness of ends When tested in accordance with EN 295-3:2012, 5.2, the maximum deviation from squareness measured at the pipe ends shall be not greater than 1 mm. 4.2.8 Deviation from straightness When test
44、ed using a straight edge in the maximum bending plane, along the whole length of the pipe barrel which is not affected by jointing or grinding, the deviation from straightness at the mid-point shall be not greater than 5 mm. 4.3 Strength 4.3.1 Crushing strength (FN) When tested in accordance with EN
45、 295-3:2012, Clause 7, the crushing strength (FN) of pipes or pipe sections shall be not less than the values given in Table 5. Higher crushing strengths can be declared. BS EN 295-7:2013EN 295-7:2013 (E) 10 Table 5 Crushing strengths Nominal size DN Minimum crushing strength (FN) kN/m 100 40 150 52
46、 200 64 250 80 300 96 400 100 500 100 600 100 700 100 800 100 900 100 1 000 100 1 200 100 1 400 90 4.3.2 Bending tensile strength If it is required to determine the crushing strength where whole pipes or pipe sections are not available, for example after failure in use, a bending tensile strength te
47、st, in accordance with EN 295-3:2012, Clause 8, shall be carried out on broken pipe pieces. The crushing strength of the pipe shall be calculated from the mean bending tensile strength of at least ten test pieces. 4.3.3 Compressive strength The compressive strength shall be determined according to E
48、N 295-3:2012, Clause 27. The minimum compressive strength shall not be less than 100 N/mm2. 4.3.4 Jacking strength The jacking strength of the pipe shall be calculated using the minimum compressive strength and the minimum annular area through which the jacking forces act. The load transferring area
49、 shall be calculated using the wall thickness at the pipe end, the type of joint, the location of sealing rings and the means of load transfer. The minimum annular area is located either at the base of any groove holding the joint sealing ring or at the load transfer ring and shall be calculated using Formula (1). ()2i2amin4d dA = (1) where BS EN 295-7:2013EN 295-7:2013 (E) 11 Aminis the minimum annular area in mm2; dais the minimum external diameter at the minimum
