1、BRITISH STANDARD BS EN 14457:2004 General requirements for components specifically designed for use in trenchless construction of drains and sewers The European Standard EN 14457:2004 has the status of a British Standard ICS 93.030 BS EN 14457:2004 This British Standard was published under the autho
2、rity of the Standards Policy and Strategy Committee on 29 July 2004 BSI 29 July 2004 ISBN 0 580 44159 8 National foreword This British Standard is the official English language version of EN 14457:2004. The UK participation in its preparation was entrusted to Technical Committee B/505, Waste water e
3、ngineering, which has the responsibility to: The UK maintained expert participation in the development of this European Standard but recorded opposition to it at both CEN Enquiry and Formal Vote stages, seeing no purpose in its introduction. However, since the standard received the required number o
4、f votes from other CEN Members, it was adopted as a European Standard resulting in automatic publication as a British Standard. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or E
5、uropean 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 British Standards Online. This publication does not purport to includ
6、e 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; present to the responsible international/European committee any enquiri
7、es 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, an inside front cover, the EN title page, pages 2 to 16, an inside bac
8、k cover 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. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14457 July2004 ICS93.030 Englishversion Generalrequirementsforcomponen
9、tsspecificallydesignedfor useintrenchlessconstructionofdrainsandsewers Prescriptionsgnralespourcomposantsutilissdansla constructiondesrseauxdvacuationetdassainissement sanstranche AllgemeineAnforderungenanBauteile,diebei grabenlosemEinbauvonAbwasserleitungenundkanlen verwendetwerden ThisEuropeanStan
10、dardwasapprovedbyCENon23April2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplic
11、ationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmember
12、sarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTA
13、NDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14457:2004:EEN 14457:2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative ref
14、erences 4 3 Terms and definitions, symbols and abbreviations.4 4 Functional and dimensional requirements .5 4.1 General5 4.2 Dimensions.6 4.2.1 Nominal sizes.6 4.2.2 Diameters6 4.2.3 Tolerances on diameters 6 4.2.4 Straightness .6 4.2.5 Squareness of end faces 7 4.2.6 Pipe length7 4.2.7 Continuity o
15、f invert7 4.3 Smoothness of bore 8 4.4 Appearance 8 4.5 Joints 8 4.6 Corrosion resistance.8 4.7 Abrasion resistance 8 4.8 Jetting resistance 9 4.9 Modification9 4.10 Coatings and linings .9 4.11 Long-term behaviour.9 4.12 Durability 9 4.13 Load bearing capacity.9 4.14 Tightness9 4.15 Temperature .10
16、 5 Test methods10 5.1 General10 5.2 Measurement of diameters and wall thicknesses 10 5.2.1 Internal diameter of pipe barrels10 5.2.2 External diameter of pipe barrels.10 5.3 Measurement of deviation from straightness of pipe barrels.10 5.4 Measurement of deviation from squareness of the ends of the
17、pipes.10 5.5 Continuity of invert10 5.6 Water tightness tests 10 5.6.1 Test for pipes .10 5.6.2 Test for pipe joints.11 5.7 Air tightness tests12 6 Marking .12 Annex A (informative) Examples of joints .13 Bibliography 16 EN 14457:2004 (E) 3 Foreword This document (EN 14457:2004) has been prepared by
18、 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 publication of an identical text or by endorsement, at the latest by January 2005, and conflicting national standards
19、shall be withdrawn at the latest by January 2005. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finl
20、and, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14457:2004 (E) 4 1 Scope This European Standard specifies general requirements for pipes
21、and their joints intended for use in drains and sewers which are installed using trenchless construction methods “pipe jacking“, “microtunnelling“ and “pilot jacking“ as defined in EN 12889 as gravity systems, according to EN 476 where any pressure to occur is a maximum of 40 kPa or operated under p
22、ressure according to EN 773 where pressure can be more than 40 kPa. This European Standard provides the general basis for the preparation or revision of product standards. It is not applicable for the evaluation of products and construction techniques. It is applicable as a reference for drawing up
23、a product specification, if there is no product standard available. This European Standard applies to components to be used in domestic waste water, rainwater and surface water and other waste waters (e.g. industrial waste water) that will not damage the components. 2 Normative references The follow
24、ing referenced documents are indispensable 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 773:1999, General requirements for components used in hy
25、draulically pressurized discharge pipes, drains and sewers. 3 Terms and definitions, symbols and abbreviations For the purposes of this European Standard, the following terms and definitions apply. 3.1 external diameter OD mean external diameter of the pipe barrel at any cross section 3.2 gravity sy
26、stem system where flow is caused by the force of gravity and where the pipe usually operates partially full 3.3 hydraulically pressurized system system where flow is caused by hydraulic pressure and where the pipe usually operates full 3.4 invert lowest point of the internal surface of the barrel of
27、 a pipe or channel at any cross section EN 476:1997 3.5 internal diameter ID mean internal diameter of the pipe barrel at any cross section EN 476:1997 EN 14457:2004 (E) 5 3.6 joint connection between the adjacent ends of two components including the means of sealing and pressure transfer ring, (dur
28、ing installation) if applicable 3.7 nominal size DN numerical designation of size of component, which is a convenient integer approximately equal to a manufacturing diameter in millimetres 3.8 pipe barrel cylindrical part of the pipe with a uniform cross section excluding joint 3.9 pipe length lengt
29、h of the internal pipe barrel 3.10 ring stiffness resistance of a pipe to diametric deflection in response to external loading applied along one diametric plane. For a circular pipe of uniform wall thickness, this is given by: 3 m D EI S = where S is the ring stiffness of the pipe in kilonewtons per
30、 square metre (kN/m); E is the modulus of elasticity in flexure in the circumferential direction in kilonewtons per square metre (kN/m); I is the second moment of area of the pipe wall in the longitudinal direction, per unit length, in metres to the fourth power per metre (m 4 /m); D mis the diamete
31、r of the neutral axis of the pipe wall, in metres (m) 3.11 surface water water drained from the surface of buildings, structures or the ground EN 476:1997 3.12 pressure transfer ring component to transfer longitudinal loads between the end-surfaces of the pipes during the installation 4 Functional a
32、nd dimensional requirements 4.1 General Product standards may include specifications which are more stringent, but not less stringent than those in this standard. EN 14457:2004 (E) 6 4.2 Dimensions 4.2.1 Nominal sizes Nominal sizes, DN, shall be specified in product standards and shall preferably be
33、 selected from Table 1. Other nominal sizes may be specified in product standards. Table 1 Nominal sizes DN 150, 200, 225, 250, 300, 400, 500, 600, 800, 1 000, 1 200, 1 400, 1 600, 1 800, 2 000 4.2.2 Diameters Product standards shall specify at least internal diameters or external diameters. NOTE It
34、 is recommended to consider the external diameter of available jacking machines for the design of pipes. 4.2.3 Tolerances on diameters 4.2.3.1 Tolerances on internal diameter The maximum admissible tolerances on the internal diameters, ID, are given in Table 2. Table 2 Tolerances on internal diamete
35、rs Nominal size Tolerances on mean internal diameter (mm) Tolerances on individual internal diameter (mm) 150 DN 250 5 10 250 600 15 30 4.2.3.2 Tolerances on external diameter The admissible tolerances on maximum external diameters are 10 0 for pipes DN 300 and 03 , 0 0 x DN for larger pipes, but no
36、t exceeding 30 0 mm. 4.2.4 Straightness For pipes up to 3 m length, the deviation of a surface line from the straight, shall not exceed the values, given in Table 3 (see also 5.2). Table 3 Admissible deviation of straightness Nominal size Deviation of straightness (mm) DN 1 000 1 000 DN 2 000 5 10 1
37、5 EN 14457:2004 (E) 7 For pipes, longer than 3 m, product standards shall specify the deviation of the surface line from the straight. 4.2.5 Squareness of end faces Product standards shall specify tolerances on squareness across the external diameter and across the wall thickness of the pipe end fac
38、es (see Figure 1). (a) Deviation across joint external diameter (b) Deviation across joint wall thickness Figure 1 Deviation from squareness NOTE Squareness of ends of pipes is significant only as it relates to the jacking operation and to the performance of the joint assembly. 4.2.6 Pipe length Pro
39、duct standards shall specify the tolerances for pipe lengths appropriate for the intended installation methods. 4.2.7 Continuity of invert Joints shall have continuity of invert within the maximum step at joints according to Table 4: EN 14457:2004 (E) 8 Table 4 Continuity of invert Nominal size Maxi
40、mum step of invert (mm) DN 300 6 DN 300 0,02 x DN no step greater than 30 4.3 Smoothness of bore Interior surfaces of pipes shall be free from visible defects that may adversely affect their hydraulic performance. Product standards shall specify the acceptable imperfections or a hydraulic performanc
41、e test. 4.4 Appearance Pipes and joints shall be free from defects, which could impair their installation and operation, as well as the durability. 4.5 Joints Product standards shall specify requirements for joints compatible with intended use. Joints of jacking pipes shall be designed so as to ensu
42、re: Tightness; lateral stability transfer of longitudinal compressive and/or tensile forces. Product standards shall specify that the manufacturer of pipes maintains specifications of: dimensions; tolerances; materials of pipe and the joints including the pressure transfer ring, if applicable. The j
43、oints as specified by the pipe manufacturer shall usually be supplied by the manufacturer of the pipes and, if possible, should be pre-installed. Informative annex A gives examples of joints. 4.6 Corrosion resistance Pipes and joints shall be resistant to corrosion by wastewater and the effects of s
44、oil, ground water and installation effects. Corrosion resistance tests should be specified in product standards. 4.7 Abrasion resistance Pipes shall be resistant to abrasive effects of hard particles in wastewater. Abrasion resistance tests can be specified in product standards. EN 14457:2004 (E) 9
45、4.8 Jetting resistance Pipes shall be resistant to damage resulting from jetting. Jetting resistance tests can be specified in product standards. 4.9 Modification Any modification on site shall be carried out in accordance with appropriate product standards and/or manufacturers instructions, without
46、 adversely affecting functional characteristics. 4.10 Coatings and linings If coatings, linings or other protective measures are required, it is necessary to specify appropriate indications in product standards, also under consideration of the installation. It may be necessary to specify additional
47、protection for joints. 4.11 Long-term behaviour Where appropriate, long-term behaviour of components shall be specified in product standards. 4.12 Durability Product standards shall give details of durability characteristics. 4.13 Load bearing capacity Product standards shall specify the requirement
48、s of all characteristics and the related test methods, necessary for structural design under construction and in service, for example: minimum crushing strengths; minimum ring stiffness values; weight per unit volume; tensile strength; apparent limit of elasticity; compressive strength; bending strength; dynamic load resistance; modulus of elasticity. The pipe manufacturer shall declare the maximum admissible jacking loads depending on the specified angular deflections during installation. The mean
