1、 CEN EN*b40 94 18sl1 3i-104589 0076335 788 BRITISH STANDARD Reinforced concrete pressure pipes and distributed pressure pipes (non-cylinder type) including joints and fittings I reinforcement concrete The European Standard EN 640 : 1994 has the status of a British Standard BS EN 640: 1995 CEN ENxb40
2、 94 B 3404589 009b33b bL4 W was published under the authority of the Standards Amd. No. Date Board and comes into effect on 15 May 1995 O BSI 1995 The following BSI references relate to the work on this standard: Committee reference B/504 Draft for comment 92/12537 DC ISBN O 580 24112 2 BS EN 640 :
3、1995 Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/504, Water supply, upon which the following bodies were represented: Association of Consulting Engineers Association of Manufacturers of Domestic Unvent
4、ed Supply 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 Ceme
5、nt Manufacturers 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 Wale
6、s The following 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 Contrac
7、tors Institution of Civil Engineers Institution of Highways and Transportation CEN EN*b4O 94 a 3404589 O096337 550 = BS EN 640 : 1995 Contents Committees responsible Inside front cover National foreword ii Foreword . 2 lxt of EN 640 3 i CEN ENtb40 94 U 3404589 0096338 497 M BS EN 644 : 1995 I Nation
8、al foreword This British Standard has been prepared by Technical Committee B/504 and is the English language version of EN 40 : 1994 Reinfored concrete pessure pipes and distributed reinforcement concrete pressure pipes (non-cylinder tgpe), including joints and fittings, published by the European Co
9、mmittee for Standardization (CEN). EN 640 was published as a result of international discussion in which the UK took an active part. Compliance with a British Standard does not of itself confer immunity from legal obligations. CEN EN*b40 94 e 3404589 0096339 323 W EUROPEAN STANDARD NORME EUROPENE EU
10、ROPISCHE NORM EN 640 October 1994 ICs 23.040.10; 23.040.40 Descriptors: Water pipelines, pressure pipes, potable water, water pipes, concrete tubes, reinforced concrete, armatures, specifications, design, equipment specifications, dimensions, tests English version Reinforced concrete pressure pipes
11、and distributed reinforcement concrete pressure pipes (non-cylinder type) including joints and fittings Tuyaux pression en bton arm et tuyaux pression armature diffuse (sans me en tle), y compris joints et pices spciales Formstcken Stahlbetondruckrohre und Betondruckrohre mit verteilter Bewehrung (o
12、hne Blechmantel) einschliesslich Rohrverbindungen und This European Standard was approved by CEN on 1994-10-26. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alte
13、ration. 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 European Standard exists in three official versions (English, French, German). A version in any other language made by trans
14、lation 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 national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembour
15、g, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1994 Copyright reserved to CEN members Ref. No. EN 640
16、: 1994 E - CEN EN*b4O 94 m 3404589 O096340 045 m me 2 EN 640 : 1994 Foreword This European Standard for concrete pipes is a standard which was prepared by WG 5, Concrete pipes, of the Tchnical Committee CENTC 164, Water supply, the Secretariat of which is held by AFNOR. During preparation of this st
17、andard the provisional results already available of CEN/TC 164/WG 1, General requirements for external systems and components, and of CEN/TC 164/165/JWG 1, Structural design, were considered. This European Standard shall be given the status of a national standard, either by publication of an identic
18、al text or by endorsement, at the latest by April 1995, and conflicting national standards shall be withdrawn at the latest by April 1995. in accordance with the common CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark,
19、Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents page Fore word O Introduction 3 1 Scope 3 2 Materials 3 2.1 Aggregates 3 reinforcement pipes 3 3 Design and fabrication of pipe 3 3.1 General
20、requirements 3 3.1.1 Wall thickness 3 3.2 Design of pipe 4 3.2.1 General 4 3.2.2 Combined load design criteria 4 3.3 Reinforcement 4 3.3.1 Circumferential reinforcement for reinforced concrete pipe 4 3.3.2 Circumferential reinforcement for distributed reinforcement pipe 4 3.3.3 Longitudinal reinforc
21、ement 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 Concrete and mortar 5 3.4.1 Mix design 5 3.4.2 Concrete strength 5 4 Factory testing 5 4.1 Concrete test
22、s 5 4.2 Pipe tests 5 4.2.1 Hydrostatic pressure tests 5 concrete pipe 5 2.2 Steel wire for distributed 4.2.2 Crushing test for reinforced 4.2.3 Combined crushing and pressure test for distributed reinforcement Pipe 6 test for distributed reinforcement pipes 6 4.2.4 Combined bending and pressure Anne
23、x A (informative) Typical design procedure 11 CEN ENxb40 94 m 3404589 0096341 T81 O Introduction The product1) which is in permanent or temporary contact with water, intended for human consumption, does not adversely affect the quality of the drinking water and does not contravene the CE Directives
24、and EFTA Regulations on the quality of drinking water. This standard is to be used together with EN 639 (Common requirements). When the relevant EN dealing with general requirements, such as General requirements for external systems and cmponents (CENITC 164/WG i), Materials in contact with water (C
25、EN/TC 164lWG 3) and Structural design (CEN/TC 164/165/JWG 1) 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: - annex A (informative): Typical design procedure. 1 Scop
26、e 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 reinforcement composed of multiple layers of small diam
27、eter wires (DRP). Pipes shall have diameter ranging from DN/ID 300 to DN/ID 4000. 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 conditions designated by the purchaser. Maximum design pre
28、ssure shall not exceed 500 kPa. The above limit shall be increased to 2000 kPa in case of distributed reinforcement pipes (DRP). Page 3 EN 640 : 1994 2 Materials Materials are as specified in clause 5 of EN 639 (Common requirements). Additional requirements are specified as follows. 2.1 Aggregates T
29、he maximum size of the aggregate shall not exceed one third of the pipe wall thickness, but in no case shall it exceed 32 mm. For distributed reinforcement pipes, the aggregate size shall not exceed the spacing between reinforcement steel wires and in no case shall exceed 4 mm. 2.2 Steel wire for di
30、stributed reinforcement pipes The wire to be used for distributed reinforcement shall conform to subclause 5.7 of EN 639 (Common requirements) and shall have a characteristic tensile strength of not less than 800 MPa and a tolerance on the diameter of I0,04 mm. 3 Design and fabrication of pipe 3.1 G
31、eneral 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). Where beam stre
32、ngth 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 EN 639. 3.1.1 Wall thickness “ble 1 shows the minimum design
33、 wall thickness for each type of pipe. 1 Should be considered as any product used for the conveyance and distribution of water intended for human consumption. CEN EN*b40 94 = 3404589 0096342 918 page 4 EN 640 : 1994 ihble 1. Minimum wall thickness Minimum design wall thickness for mm 300 400 450 500
34、 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2 100 3200 3300 2400 2500 and arger 60 60 60 60 65 65 70 75 85 90 100 110 115 125 135 140 150 160 165 180 185 190 200 *) Minimum design wall thickness for DRP mm 40 40 40 40 45 45 50 55 60 65 65 70 70 75 80 *I *) *I *) 1 *) *) *
35、I “1 1 Tb be supplied by manufacturer. 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 the cages shall
36、 be circular in pipe for a design pressure of more than 150 kPa or in RCP larger than DN/ID 1800. 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 than 300 kPa. Circumferential and longitudinal reinforcem
37、ent 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. 3.2.2 Combined load design criteria The pipe shall be designed to resist the stresses due to internal pressure, exter
38、nal loads and, if required, beam loading resulting from each of the following conditions: - a combination of maximum 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 an
39、d thrust calculations and bedding angle shall be calculated in accordance with the appropriate national standards transposing 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 Reinfo
40、rcement 3.3.1 Circumferential reinforcement for reiltforced concrete pipe The circumferential reinforcement shall consist 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
41、testing a representative sample of butt or lap welds at a stress equal to at least the original strength of the steel. 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 defor
42、ming during fabrication and shall be suitable to give the pipe the designed strength. For pipes having thickness less than 80 mm, the reinforcement shall normally be a single cage. For multiple cage reinforcement, the internal cage shall have at least 50 % of the circumferential steel area required
43、by the design while the external cage shall have at least 40 % of the required area. The maximum distance between two adjacent bars of the circumferential reinforcement shall not exceed 1,5 times the wall thickness but in no case greater than 150 mm. 3.3.2 Circuwerential reinforcement for distribute
44、d reinforcement pipe For DRP the circumferential reinforcement shall consist of layers of wire with diameter not greater than 2 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
45、and total volume of pipe wall) shall not be less than 1 %. CEN ENS640 94 m 3404589 0096343 85Y m In each layer, the design spacing between adjacent wires shall not be less than 3 times the wire diameter and not more than twice the largest size of aggregate used; deviation from design spacing shall b
46、e 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 thickness, contain a total of at least 90 % of design number of wires. 3.3.3 Longitudinal reinforcement for reinforced concrete pipe The
47、 circumferential reinforcement in cages shall be accurately 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 add
48、itional bars shall be provided as necessary so that the circumferential spacing between longitudinal bars shall not exceed 450 mm in any barrel cage. 3.3.4 Longitudinal reinforcement for distributed reinforcement pipe For distributed reinforcement pipe, the longitudinal reinforcement shall be made o
49、f wire with diameter not exceeding 2 mm, and shall be placed in layers parallel to the pipe axis and in between layers of circumferential reinforcement. Contact between longitudinal and circumferential reinforcement is allowed. If longitudinal reinforcement is made of short lengths of straight wire the overlap shall be not less than 80 times the wire diameter. If the longitudinal reinforcement is made of ribbon composed by a zig-zag continuous wire, the overlapping sides of the helically wrapped ribbon shall not be less than 40 times the wire diameter. Specif
