1、BRITISH STANDARD BS EN 642:1995 Incorporating Corrigendum No. 1 Prestressed concrete pressure pipes, cylinder and non-cylinder, including joints, fittings and specific requirement for prestressing steel for pipes The European Standard EN 642:1995 has the status of a British Standard ICS 23.040.50 BS
2、 EN 642:1995 This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 June 1995 BSI 7 December 2004 The following BSI references relate to the work on t
3、his standard: Committee reference B/505 Draft for comment 92/12539 DC ISBN 0 580 24113 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/505, Water supply, upon which the following bodies were represented: Association o
4、f Consulting Engineers Association of Manufacturers of Domestic Unvented Supply Systems Equipment (MODUSSE) British Bathroom Council British Foundry Association British Non-Ferrous Metals Federation British Plastics Federation British Plumbing Fittings Manufacturers Association Department of the Env
5、ironment Department of the Environment (Drinking Water Inspectorate) Fibre Cement 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 A
6、ssociation Water Research Centre Water Services Association of England and Wales The following bodies were also represented in the drafting of the standards, through subcommittees and panels: Association of Metropolitan Authorities British Precast Concrete Federation Ltd. Concrete Pipe Association C
7、oncrete Society Department of Transport Federation of Civil Engineering Contractors Institution of Civil Engineers Institution of Highways and Transportation Amendments issued since publication Amd. No. Date Comments 15453 Corrigendum No. 1 7 December 2004 National foreword amendedBS EN 642:1995 BSI
8、 7 December 2004 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 642 3BS EN 642:1995 ii BSI 7 December 2004 National foreword This British Standard has been prepared by Technical Committee B/504 and is the English language version of EN 642:1994 P
9、restressed concrete pressure pipes, cylinder and non-cylinder, including joints, fittings and specific requirement for prestressing steel for pipes, published by the European Committee for Standardization (CEN). Together with BS EN 639 it supersedes BS 4625, which is withdrawn. EN 642 was published
10、as a result of international discussion in which the UK took an active part. This publication does not purport to include 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 ob
11、ligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 23 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NO
12、RM EN 642 October 1994 ICS 23.040.30; 23.040.50 Descriptors: Water pipelines, pressure pipes, potable water, water pipes, concrete tubes, prestressed concrete, metal plates, specifications, computation, equipment specifications, dimensions, tests English version P r e s t r e s s e d c o n c r e t e
13、 p r e s s u r e p i p e s , c y l i n d e r a n d non-cylinder, including joints, fittings and specific requirement for prestressing steel for pipes Tuyaux pression en bton prcontraint, avec ou sans me en tle, y compris joints et pices spciales et prescriptions particulires relatives au fil de prco
14、ntrainte pour tuyaux Spannbetondruckrohre, mit und ohne Blechmantel, einschlielich Rohreverbindungen, Formstcke und besonderen Anforderungen an Spannstahl fr Rohre This European Standard was approved by CEN on 1994-10-26. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whic
15、h 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 European Stan
16、dard 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 national stan
17、dards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Cen
18、tral Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 642:1994 EEN 642:1995 BSI 7 December 2004 2 Foreword This European Standard for concrete pipes is a standard which was prepared by WG5, Concrete pipes, of the Technical Committee CEN/TC 164, Wate
19、r supply, the Secretariat of which is held by AFNOR. During preparation of this standard 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 sha
20、ll be given the status of a national standard, either by publication of an identical 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 CEN/CENELEC Internal Regulations, the following countrie
21、s are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 0I n t r o d u c t i o n 3 1S c o p e 3 2M a t e r
22、 i a l s 3 3 Design and fabrication of pipe 3 3.1 General requirements 3 3.1.1 General 3 3.1.2 Wall thickness 4 3.2 Design of pipes 5 3.2.1 General 5 3.2.2 Design requirements 5 3.3 Reinforcement 5 3.4 Concrete and mortar 5 3.4.1 Mix design 5 3.4.2 Concrete strength 6 3.5 Prestressing 6 3.5.1 Longit
23、udinal prestressing 6 3.5.2 Circumferential prestressing 6 3.5.3 Multiple layers 7 3.6 Curing 7 4 Factory testing 7 4.1 Concrete test 7 4.2 Hydrostatic test 7 Page 4.2.1 General 7 4.2.2 Cylinder pipe 7 4.2.3 Non-cylinder pipe 7 4.2.4 Test pressure 7 4.3 Permeability test on coating 8 4.3.1 Test purp
24、ose 8 4.3.2 Test frequency on products 8 4.3.3 Testing equipment 8 4.3.4 Test method 8 4.3.5 Test results 8 4.3.6 Test acceptance criteria 9 Annex A (normative) Specific technical requirements for high tensile steel wire used for prestressing concrete pipe with or without steel cylinder 11 Annex B (
25、informative) Typical joints 17 Annex C (informative) Design guidance for prestressed concrete cylinder pipes 19 Annex D (informative) Design guidance for prestressed concrete non-cylinder pipes 22 Figure 1 Typical permeability test equipment 9 Figure 2 Permeability test results and examples 10 Figur
26、e A.1 Details of test cylinder 14 Figure A.2 Wound test cylinder 15 Figure A.3 Typical arrangement for winding the test cylinders 15 Figure A.4 Arrangement of test cylinder in acid solution 16 Figure B.1 Typical steel joints 17 Figure B.1A Typical embedded cyclinder pipe joint 17 Figure B.1B Typical
27、 internal weld joint 17 Figure B.1C Typical lined cyclinder pipe joint 17 Figure B.1D Typical external weld joint 17 Figure B.2 Typical concrete joints 18 Figure B.2A Typical sliding ring joint 18 Figure B.2B Typical rolling ring joint 18 Figure B.2C Typical monolithic pipe rolling ring joint 18 Fig
28、ure B.2D Typical monolithic pipe sliding ring joint 18 Figure B.2E Typical sliding ring joint with metal seating for sealing ring 18 Table 1 Minimum design wall thickness 4EN 642:1995 BSI 7 December 2004 3 0 Introduction The product 1)in permanent or temporary contact with water, intended for human
29、consumption, shall not adversely affect the quality of the drinking water and shall not contravene the CE Directives and EFTA Regulations on the quality of drinking water. This standard is to be used together with the common requirements standard (EN 639). When the relevant EN dealing with general r
30、equirements, such as General requirements for external systems and components (CEN/TC 164/WG 1), Materials in contact with water (CEN/TC 164/WG 3), and Structural design (CEN/TC 164/165/JWG 1) are adopted, the current standards shall be revised, where appropriate, in order to ensure that these requi
31、rements comply with these relevant ENs. To the present standard are attached: Annex A (normative): Specific technical requirements for high tensile steel wire used for prestressing concrete pipe with or without steel cylinder; Annex B (informative): Typical joints; Annex C (informative): Design guid
32、ance for prestressed concrete cylinder pipes; Annex D (informative): Design guidance for prestressed concrete non-cylinder pipes. 1 Scope This standard covers the requirements and the manufacture of prestressed concrete cylinder and non-cylinder pressure pipes and fittings in sizes from DN/ID 500 to
33、 DN/ID 4000 inclusive. Larger sizes could be manufactured based on the concepts of this standard. These types of pipes are designed for the internal pressure, external loads and bedding conditions designated by the purchaser. 2 Materials Materials are specified in Clause 5 of EN 639 (common requirem
34、ents). Additional requirement is specified as follows: The maximum size of aggregate shall not exceed the least of the following: the concrete cover; or 0,33 times the thickness of the non-cylinder core pipe wall; or 0,33 times the concrete wall thickness on either side of the steel cylinder. 3 Desi
35、gn and fabrication of pipe 3.1 General requirements 3.1.1 General Prestressed concrete cylinder pipe shall have the following principal features: a welded steel cylinder with steel joint rings welded to its ends; for lined-cylinder pipe, a core consisting of a lining of concrete within the steel cyl
36、inder, or for embedded-cylinder pipe, a core consisting of the steel cylinder encased in concrete; circumferential prestressing with high-tensile wire wound around the outside of the core in one or more layers at a predetermined stress and fastened securely at its ends; a coating of dense mortar or
37、concrete, covering and protecting the core and wire, except for the necessarily exposed surfaces of the joint rings; a self-centring joint so designed that the joint shall be watertight under all conditions of service. 1) Should be considered as any product used for the conveyance and distribution o
38、f water intended for human consumption.EN 642:1995 4 BSI 7 December 2004 Prestressed concrete non-cylinder pipe shall have the following principal features: a concrete core pipe either steel reinforced or longitudinally prestressed with pretensioned high tensile steel wire embedded in the concrete;
39、circumferential prestressing with high-tensile wire wound around the outside of the core in one or more layers at a predetermined stress and fastened securely at its ends; a coating of dense mortar or concrete, covering and protecting the wire; a self-centring joint so designed that the joint shall
40、be watertight under all conditions of service. Or for monolithic type: a concrete pipe longitudinally prestressed with pretensioned high tensile steel wire embedded in the pipe wall which is cast in one operation; circumferential prestressing by means of a reinforcement cage of high tensile steel wi
41、re also embedded in the pipe wall and prestressed to a predetermined stress by means of hydraulic expansion while the concrete is still fresh; a self-centring joint so designed that the joint shall be watertight under all conditions of service. 3.1.2 Wall thickness Table 1 shows the minimum design w
42、all thickness for each type of pipe. Table 1 Minimum design wall thickness Pipe DN/ID Cylinder pipe Non-cylinder pipe t1 min t2 min t3 min monolithic mm mm mm mm 5 0 05 04 04 5 6 0 05 04 04 5 7 0 05 04 05 0 8 0 05 04 55 5 9 0 05 54 56 0 1 000 65 50 65 1 100 70 50 70 1 200 75 60 75 1 250 75 60 80 1 4
43、00 85 70 85 1 500 90 70 90 1 6 0 01 0 07 59 5 1 800 115 75 105 2 000 125 80 115 2 200 135 90 125 2 400 145 100 135 2 500 150 100 140 2 600 160 110 145 2 800 170 120 155 3 000 180 130 165 3 200 190 140 3 500 210 160 4 000 240 180 NOTES t 1min minimum design thickness of the core wall including the th
44、ickness of the cylinder. t 2min minimum design thickness of the core wall. t 3min minimum design thickness of the pipe wall.EN 642:1995 BSI 7 December 2004 5 3.2 Design of pipes 3.2.1 General The reinforcement of the cylinder pipe shall consist of a welded steel cylinder in the core and high-tensile
45、 wire helically wound around the core under measured and controlled tension after the concrete in the core has been placed and cured. The minimum design thickness of the cylinder shall be 1,5 mm for all diameters. For both cylinder and non-cylinder pipe the size of the high-tensile wire and the spac
46、ing and tension under which it is wound shall be such that the requirements specified for the design conditions stated in Clause 3.2.2 are met. The design shall fully recognize all losses due to elastic and inelastic deformations. The initial tension in the high-tensile wire shall not exceed 75 % of
47、 the characteristic strength of the wire. The wire shall not be less than 4 mm in diameter. The minimum clear spacing between wires shall be the wire diameter up to a maximum of 6 mm in the same layer of reinforcement. The maximum centreline spacing of the wire shall be 50 mm. For lined-cylinder pip
48、e with wire 6 mm and larger, the maximum centreline spacing of the wire shall be 25 mm. 3.2.2 Design requirements The pipes shall be designed to resist the flexural and hoop stresses resulting from each of the following conditions: design pressure + dead load: there shall be no tension in the core;
49、maximum design pressure + 100 kPa + dead load: tension in the core shall not exceed 0,38 3 f ck 2for cylinder pipe or 0,13 3 f ck 2for non-cylinder pipe; design pressure + dead load + live load: tension in the core shall not exceed 0,38 3 f ck 2for cylinder pipe or 0,13 3 f ck 2for non-cylinder pipe; maximum design pressure: there shall be no tension in the core;
