1、BRITISH STANDARD BS EN 640:1995 Reinforced concrete pressure pipes and distributed reinforcement concrete pressure pipes (non-cylinder type), including joints and fittings The European Standard EN640:1994 has the status of a British StandardBSEN640:1995 This British Standard, havingbeen prepared und
2、er thedirection of the Sector Boardfor Building and Civil Engineering, was published underthe authority of the Standards Board and comes intoeffect on 15 May1995 BSI07-1999 The following BSI references relate to the work on this standard: Committee reference B/504 Draft for comment92/12537DC ISBN 0
3、580 24112 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical CommitteeB/504, Water supply, upon which the following bodies were represented: Association of Consulting Engineers Association of Manufacturers of Domestic Unvented Suppl
4、y Systems Equipment (MODUSSE) British Bathroom Council British Foundry Association British Non-Ferrous Metals Federation British Plastics Federation British Plumbing Manufacturers Association Department of the Environment Department of the Environment (Drinking Water Inspectorate) Fibre Cement Manuf
5、acturers Association Limited Institute of Plumbing Institution of Water and Environmental Management Local Authority Organizations Scottish Association of Directors of Water and Sewerage Services Water Companies Association Water Research Centre Water Services Association of England and Wales The fo
6、llowing bodies were also represented in the drafting of this standard, through subcommittees and panels: Association of Metropolitan Authorities British Precast Concrete Federation Ltd. Concrete Pipe Association Concrete Society Department of Transport Federation of Civil Engineering Contractors Ins
7、titution of Civil Engineers Institution of Highways and Transportation Amendments issued since publication Amd. No. Date CommentsBSEN640:1995 BSI 07-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN640 3BSEN640:1995 ii BSI 07-1999 National fore
8、word This British Standard has been prepared by Technical CommitteeB/504 and is the English language version of EN640:1994 Reinforced concrete pressure pipes and distributed reinforcement concrete pressure pipes (non-cylinder type), including joints and fittings, published by the European Committee
9、for Standardization (CEN). EN640 was published as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance
10、with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to12 and a back cover. This standard has been updated (see copyright date) and may have had amendme
11、nts incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN640 October1994 ICS 23.040.10;23.040.40 Descriptors: Water pipelines, pressure pipes, potable water, water pipes, concrete tubes, reinforced concrete, armatur
12、es, specifications, design, equipment specifications, dimensions, tests English version Reinforced concrete pressure pipes and distributed reinforcement concrete pressure pipes (non-cylinder type), including joints and fittings Tuyaux pression en bton arm et tuyaux pression armature diffuse (sansmee
13、ntle),ycompris joints et pices spciales Stahlbetondruckrohre und Betondruckrohre mit verteilter Bewehrung (ohne Blechmantel) einschliesslich Rohrverbindungen und Formstcken This European Standard was approved by CEN on1994-10-26. CEN members are bound to comply with the CEN/CENELEC Internal Regulati
14、ons which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This Europ
15、ean Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the natio
16、nal standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Norm
17、ung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN640:1994 EEN640:1994 BSI 07-1999 2 Foreword This European Standard for concrete pipes is a standard which was prepared by WG5, Concrete pipes, of the Technical Committee CEN/TC164, Water su
18、pply, the Secretariat of which is held by AFNOR. During preparation of this standard the provisional results already available of CEN/TC164/WG1, General requirements for external systems and components, and of CEN/TC164/165/JWG1, Structural design, were considered. This European Standard shall be gi
19、ven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April1995, and conflicting national standards shall be withdrawn at the latest by April1995. In accordance with the common CEN/CENELEC Internal Regulations, the following countries a
20、re bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 0 Introduction 3 1 Scope 3 2 Materials 3 2.1 Aggregate
21、s 3 2.2 Steel wire for distributed reinforcement pipes 3 3 Design and fabrication of pipe 3 3.1 General requirements 3 3.1.1 Wall thickness 3 3.2 Design of pipe 3 3.2.1 General 3 3.2.2 Combined load design criteria 4 3.3 Reinforcement 4 3.3.1 Circumferential reinforcement for reinforced concrete pip
22、e 4 3.3.2 Circumferential reinforcement for distributed reinforcement pipe 4 3.3.3 Longitudinal reinforcement for reinforced concrete pipe 5 3.3.4 Longitudinal reinforcement for distributed reinforcement pipe 5 3.3.5 Longitudinal prestressing reinforcement 5 3.3.6 Placement and cover to steel 5 3.4
23、Concrete and mortar 5 3.4.1 Mix design 5 3.4.2 Concrete strength 5 4 Factory testing 5 4.1 Concrete tests 5 4.2 Pipe tests 5 4.2.1 Hydrostatic pressure tests 5 4.2.2 Crushing test for reinforced concrete pipe 5 4.2.3 Combined crushing and pressure test for distributed reinforcement pipe 6 4.2.4 Comb
24、ined bending and pressure test for distributed reinforcement pipes 6 Annex A (informative) Typical design procedure 11 Figure 1 Crushing test 7 Figure 2 Combined crushing and pressure test for distributed reinforcement pipe 9 Figure 3 Combined bending and pressure test for distributed reinforcement
25、pipe 10 Figure A.1 Coefficient F p12 Table 1 Minimum wall thickness 4 Table 2 Reduction factors for V shaped support 6EN640:1994 BSI 07-1999 3 0 Introduction The product 1)which is in permanent or temporary contact with water, intended for human consumption, does not adversely affect the quality of
26、the drinking water and does not contravene the CE Directives and EFTA Regulations on the quality of drinking water. This standard is to be used together with EN639 (Common requirements). When the relevant EN dealing with general requirements, such as General requirements for external systems and com
27、ponents (CEN/TC164/WG1), Materials in contact with water (CEN/TC164/WG3) and Structural design (CEN/TC164/165/JWG1) are adopted, the current standard shall be revised, where appropriate, in order to ensure that these requirements comply with the relevant ENs. To the present standard, is attached: An
28、nex A (informative): Typical design procedure. 1 Scope This European Standard covers the requirements and manufacture of circumferentially reinforced concrete pressure pipe, without steel cylinder and not circumferentially prestressed, with steel reinforcement (RCP) or a homogeneously distributed re
29、inforcement composed of multiple layers of small diameter wires (DRP). Pipes shall have diameter ranging from DN/ID300 to DN/ID4000. Larger sizes could be manufactured based on the concepts of this standard. This type of pipe is designed for the internal pressure, external loads, and bedding conditi
30、ons designated by the purchaser. Maximum design pressure shall not exceed500kPa. The above limit shall be increased to2000kPa in case of distributed reinforcement pipes (DRP). 2 Materials Materials are as specified in clause 5 of EN639 (Common requirements). Additional requirements are specified as
31、follows. 2.1 Aggregates The maximum size of the aggregate shall not exceed one third of the pipe wall thickness, but in no case shall it exceed32mm. For distributed reinforcement pipes, the aggregate size shall not exceed the spacing between reinforcement steel wires and in no case shall exceed4mm.
32、2.2 Steel wire for distributed reinforcement pipes The wire to be used for distributed reinforcement shall conform to subclause 5.7 of EN639 (Common requirements) and shall have a characteristic tensile strength of not less than800MPa and a tolerance on the diameter of 0,04mm. 3 Design and fabricati
33、on of pipe 3.1 General requirements Pipes shall have the following principal features: a reinforcing cage or cages of steel rods, bars, wire, or fabric encased in a dense concrete wall (RCP), or multiple layers of continuous thin steel wire helically wrapped and encased in a dense mortar wall (DRP).
34、 Where beam strength is required by design, the longitudinal reinforcement shall consist of steel bars or wires or layers of wire ribbon. Prestressing wire may also be used. Joints shall be provided with elastomeric sealing rings in accordance with 5.8 of EN639. 3.1.1 Wall thickness Table 1 shows th
35、e minimum design wall thickness for each type of pipe. 3.2 Design of pipe 3.2.1 General Steel reinforcement shall consist of one or more circular cages, or a single elliptical cage, or a combination of an elliptical cage and one or more circular cages or multiple layers of thin wire. At least one of
36、 the cages shall be circular in pipe for a design pressure of more than150kPa or in RCP larger than DN/ID1800. An inner circular cage and an outer circular cage shall be used and may be combined with an elliptical cage in pipe for design pressures of more than300kPa. Circumferential and longitudinal
37、 reinforcement for DRP shall be placed in a minimum of six layers and two layers respectively. The cross-sectional area of the reinforcement shall be sufficient to meet the design requirements. 1) Should be considered as any product used for the conveyance and distribution of water intended for huma
38、n consumption.EN640:1994 4 BSI 07-1999 Table 1 Minimum wall thickness 3.2.2 Combined load design criteria The pipe shall be designed to resist the stresses due to internal pressure, external loads and, if required, beam loading resulting from each of the following conditions: a combination of maximu
39、m design pressure and dead loads; a combination of design pressure, dead loads, and live loads. For information, see informative annex. Dead and live loads, coefficients for moment and thrust calculations and bedding angle shall be calculated in accordance with the appropriate national standards tra
40、nsposing EN as available or, in absence of such standards, with the appropriate regulations or recognized and accepted methods at the place where the pipeline is installed. 3.3 Reinforcement 3.3.1 Circumferential reinforcement for reinforced concrete pipe The circumferential reinforcement shall cons
41、ist of steel bars or wire in helical or hoop form, or welded wire fabric shaped and lap welded or butt welded into cages. The weld quality and welding procedures shall be assured by testing a representative sample of butt or lap welds at a stress equal to at least the original strength of the steel.
42、 The elements composing the circumferential reinforcement shall be connected by longitudinal bars. The diameter and number of these bars shall be sufficient to prevent the cage deforming during fabrication and shall be suitable to give the pipe the designed strength. For pipes having thickness less
43、than80mm, the reinforcement shall normally be a single cage. For multiple cage reinforcement, the internal cage shall have at least50% of the circumferential steel area required by the design while the external cage shall have at least40% of the required area. The maximum distance between two adjace
44、nt bars of the circumferential reinforcement shall not exceed1,5 times the wall thickness but in no case greater than150mm. 3.3.2 Circumferential reinforcement for distributed reinforcement pipe For DRP the circumferential reinforcement shall consist of layers of wire with diameter not greater than2
45、mm in helical or hoop form homogeneously distributed in the pipe wall. For the above pipe the specific volume of reinforcement (as ratio between volume of reinforcing wire and total volume of pipe wall) shall not be less than1%. In each layer, the design spacing between adjacent wires shall not be l
46、ess than3 times the wire diameter and not more than twice the largest size of aggregate used; deviation from design spacing shall be accepted if, in a longitudinal section of the central part of the barrel, the following condition is met: five adjacent squares, having sides equal to the wall thickne
47、ss, contain a total of at least90% of design number of wires. DN/ID Minimum design wall thickness for RCP mm Minimum design wall thickness for DRP mm 300 400 450 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 and larger 60 60 60 60 65 65 70 75 85
48、90 100 110 115 125 135 140 150 160 165 180 185 190 200 a 40 40 40 40 45 45 50 55 60 65 65 70 70 75 80 a a a a a a a a a a To be supplied by manufacturer.EN640:1994 BSI 07-1999 5 3.3.3 Longitudinal reinforcement for reinforced concrete pipe The circumferential reinforcement in cages shall be accurate
49、ly spaced and rigidly assembled by means of longitudinal bars securely attached so that it is maintained in proper shape and position during the casting of the pipe. Not less than four longitudinal bars shall be provided for each cage, and additional bars shall be provided as necessary so that the circumferential spacing between longitudinal bars shall not exceed450mm in any barrel cage. 3.3.4 Longitudinal reinforcement for distributed reinforcement pipe For distributed reinforcement pipe, the longitudinal reinforcement shall be made of
