1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 476:2011General requirements for components used in drains and sewersBS EN 476:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 47
2、6:2011. It supersedes BS EN 476:1998, BS EN 773:1999 and BS EN 1293:1999, which are withdrawn. The UK participation in its preparation was entrusted by Technical Committee B/505, Waste Water Engineering.A list of organizations represented on this committee can be obtained on request to its secretary
3、.BSI, as a member of CEN, is obliged to publish EN 476:2011 as a British Standard. However, attention is drawn to the fact that, despite taking an active part in the discussions leading to the drafting of the standard, the UK committee consistently voted against it. This was due to BS EN 476:2011 di
4、ctating what is specified in material-specific standards. This can cause problems where dimensional requirements and performance class intervals are specified, whereas the design needs for a specific material may require alternative values to be implemented instead.The UK committee also had concerns
5、 that some parts of the definitive criteria in EN 476 are in conflict with national regulations. In particular, the committee sees the dimensioning of “Manholes with access for cleaning and inspection by personnel in only exceptional circumstances” as an invitation to accept poten-tially dangerous s
6、ituations. This is contrary to established UK good practice (see Approved Document H (Drainage and waste disposal) to the Building Regulations and the National Annex to BS EN 752, clause NA.12) which demands that, should personnel need to enter a manhole, it should be designed for safe working, irre
7、spective of how infrequently the need may arise.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 62261 8 ICS 23.040.01; 91.140.80; 93.030 Compliance with a British Standard cannot confe
8、r immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2011. Amendments issued since publicationDate Text affectedBS EN 476:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 476 January 2011 ICS 93
9、.030 Supersedes EN 1293:1999, EN 476:1997, EN 773:1999English Version General requirements for components used in drains and sewers Exigences gnrales pour les composants utiliss pour les branchements et les collecteurs dassainissement Allgemeine Anforderungen an Bauteile fr Abwasserleitungen und -ka
10、nle This European Standard was approved by CEN on 23 November 2010. 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 bibliographica
11、l 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 responsibility o
12、f 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, Greece, Hunga
13、ry, 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 Management Centre
14、: 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 476:2011: EBS EN 476:2011EN 476:2011 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .64 Symbols and ab
15、breviations 95 Dimensional requirements 95.1 General 95.2 Dimensions of pipes and fittings .95.2.1 Nominal sizes .95.2.2 Internal diameters and tolerances 105.2.3 Geometrical characteristics of pipes 105.2.4 Geometrical characteristics of fittings . 115.3 Dimensions of manholes and inspection chambe
16、rs. 125.3.1 General . 125.3.2 Manholes with access for cleaning and inspection by personnel 125.3.3 Manholes with access for cleaning and inspection by personnel in only exceptional circumstances . 125.3.4 Inspection chambers 135.4 Interconnection . 136 Performance requirements 146.1 Mechanical resi
17、stance of pipes and fittings 146.1.1 Mechanical strength of pipes and fittings in the cross section . 146.1.2 Longitudinal bending moment resistance . 156.2 Mechanical resistance of manholes, shafts and inspection chambers above the base unit . 156.2.1 General . 156.2.2 Circular sections . 156.2.3 O
18、ther shapes . 156.2.4 Tapers, reducing and cover slabs. 156.3 Tightness . 166.3.1 Maximum internal test pressure 166.3.2 Seals for joints 176.3.3 Rigid joints 176.3.4 Joint deflection . 176.3.5 Joint shear load 186.3.6 Restrained joints . 186.4 Continuity of invert . 186.5 Temperature 186.6 Dimensio
19、nal stability 196.7 Smoothness of bore . 196.8 Appearance . 196.9 Corrosion resistance 196.10 Abrasion resistance . 196.11 Coatings and linings 196.12 Long-term behaviour 196.13 Durability . 206.14 Sealing elements. 206.15 Resistance against cleaning operations 206.16 Handling . 20BS EN 476:2011EN 4
20、76:2011 (E) 3 7 Test methods . 207.1 Measurement of dimensions 207.1.1 Mean internal diameter of barrels 207.1.2 Mean external diameter of barrels . 207.1.3 Spigots and sockets 207.1.4 Wall thickness of barrels 207.1.5 Deviation from straightness of barrels . 217.1.6 Deviation from squareness of the
21、 ends of the pipes . 217.2 Load bearing capacity tests . 217.2.1 Load bearing capacity tests for pipes . 217.2.2 Load bearing capacity tests for sections of manholes and shafts 227.3 Longitudinal bending moment resistance test for pipes 227.4 Tightness tests 227.4.1 Tightness test of pipes, fittings
22、, manholes and inspection chambers 227.4.2 Tightness test of joints . 247.4.3 Test methods for discharge components for use inside buildings . 248 Marking, labelling and packaging 25Bibliography 26BS EN 476:2011EN 476:2011 (E) 4 Foreword This document (EN 476:2011) has been prepared by Technical Com
23、mittee CEN/TC 165 “Waste water 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 July 2011, and conflicting national standards shall be withdra
24、wn at the latest by July 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 any or all such patent rights. This document supersedes EN 476:1997, EN 773:1999 and E
25、N 1293:1999. The specifications of this standard have been based on the requirements for wastewater systems specified in EN 752 and EN 12056. This document is the result of merging EN 476, EN 773 and EN 1293. According to the CEN/CENELEC Internal Regulations, the national standards organizations of
26、the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
27、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 476:2011EN 476:2011 (E) 5 1 Scope This European Standard specifies general requirements for components inside and outside buildings (see EN 12056-1) such as pipes, fittings and manholes with their respective joints inte
28、nded for use in discharge pipes, drains and sewers which operate as gravity systems allowing for a maximum pressure of 40 kPa. It also specifies general requirements for components used in hydraulically and pneumatically pressurised discharge pipes, drains and sewers. It provides basic specification
29、s to be respected in material related product standards for these applications. It is not applicable for the direct evaluation of products. It is applicable as a reference for drawing up a product specification, if there is no product standard available. NOTE Where the term “inside buildings“ is use
30、d in the context of components fixed inside buildings, it also includes discharge pipes and fittings fixed on external surfaces of buildings. This European Standard covers components to be used in conveying in a satisfactory manner: domestic wastewater; rainwater and surface water; and other waste w
31、aters acceptable for discharge into the system (e.g. industrial wastewater). This European Standard applies to components of circular and other cross sections. This European Standard applies equally to components which are factory-made and to those constructed on site, where applicable. This Europea
32、n Standard does not apply to components used for trenchless construction according to EN 14457 and for components used for renovation of drains and sewers according to EN 13380. 2 Normative references The following referenced documents are indispensable for the application of this document. For date
33、d references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 124, Gully tops and manhole tops for vehicular and pedestrian areas Design requirements, type testing, marking, quality control EN 681-1, Elastom
34、eric seals Materials requirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber EN 681-2, Elastomeric Seals Materials requirements for pipe joint seals used in water and drainage applications Part 2: Thermoplastic elastomers EN 681-3, Elastomeric seals Materi
35、als requirements for pipe joint seals used in water and drainage applications Part 3: Cellular materials of 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 805:2000, Water
36、supply Requirements for systems and components outside buildings BS EN 476:2011EN 476:2011 (E) 6 EN 1085:2007, Wastewater treatment Vocabulary EN 13101, Steps for underground man entry chambers Requirements, marking, testing and evaluation of conformity EN 14396, Fixed ladders for manholes EN 14801,
37、 Conditions for pressure classification of products for water and wastewater pipelines ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1085:2
38、007 and EN 805:2000 and the following apply. 3.1 hydraulically pressurised system system where flow is caused by hydraulic pressure and where the pipe normally operates full 3.2 pneumatically pressurized system system where flow is caused by pneumatic pressure which can be applied either as compress
39、ed air upstream or partial vacuum downstream and where the pipe normally operates full 3.3 nominal size DN numerical designation of size of component, which is a convenient integer approximately equal to a manufacturing dimension in millimetres and can apply to either the internal diameter (DN/ID) o
40、r the external diameter (DN/OD) NOTE DN/OD pipes with solid or hollow spiral or annular profiled external surface and outside smooth spigot jointing dimensions, and with larger OD than the spigot may be designated by the spigot dimension. 3.4 external diameter OD mean external dimension of the pipe
41、barrel at any cross section where for pipes with external profiles on the barrels, the external diameter is the maximum diameter when viewed in cross section 3.5 internal diameter ID mean internal dimension of the pipe barrel at any cross section 3.6 pipe barrel cylindrical part of the pipe with a u
42、niform longitudinal profile excluding socket and spigot 3.7 invert lowest point of the internal surface of the barrel of a pipe or channel at any cross section BS EN 476:2011EN 476:2011 (E) 7 3.8 rigid pipe pipe, the load carrying capacity of which is limited by breaking or overstressing, without si
43、gnificant deformation of its cross section 3.9 semi-rigid pipe pipe whose load carrying capacity is limited either by deformation/overstressing (flexible behaviour) or by breaking (rigid behaviour) depending on its ring stiffness 3.10 flexible pipe pipe, the load carrying capacity of which is limite
44、d by diametral deformation under load to the ultimate design criteria without breaking or overstressing 3.11 joint connection between the adjacent ends of two components including the means of sealing 3.12 adjustable fitting fitting which is designed to permit specific angular deflection at the time
45、 of installation (for pressurized and vacuum systems) 3.13 adjustable joint joint which permits significant angular deflection at the time of installation but not thereafter 3.14 flexible joint joint which permits angular deflection 3.15 rigid joint joint that does not permit angular deflection 3.16
46、 restrained joint joint in which a means is provided to prevent separation 3.17 proof load specified test load which a component withstands where the related requirements of the product standard are met 3.18 ultimate load load which causes failure of a component (under test) which shall be as specif
47、ied in product standards 3.19 crushing strength load per unit length a rigid pipe is required to withstand in kN/m 3.20 ring stiffness resistance of a pipe to diametral deflection in response to external loading applied along one diametric plane given as follows: BS EN 476:2011EN 476:2011 (E) 8 3mDI
48、ES= 3.21 manhole chamber with a removable cover constructed on a drain or sewer to permit entry by personnel EN 752:2008, 3.41 NOTE Examples are given in Figure 1. Key 1 adjusting unit 2 base unit 3 cover slab 4 chamber unit 5 reducing slab 6 shaft unit 7 taper NOTE 1 Joint details have been omitted for clarity NOTE 2 Precast base slabs of structures can be integral with the base unit or a separate slab incorporating construction joints. Figure 1 Description of manhole and inspection chamber components 3.22 inspection chamber chamber with a removable cover constructed on
