SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN SOUTH AFRICAN NATIONAL STANDARD Prestressed concrete pipes Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Table of changes Change No. Date Scope Amdt Amended to change the requirements for reinforcement. Amdt Amended to update referenced standards. Amdt Amended to update referenced standards. Amdt Amended to change the requirement for water. Amdt Amended to change the designation of SABS standards to SANS standards, to remove reference to the standardization mark scheme, to update the definition of "acceptable", to update referenced standards, and to move reference to legislation to the foreword. Amdt Amended to update referenced standards. Foreword This South African standard was approved by National Committee SABS/TC 081/SC 01, Construction materials, products and test methods Cement, lime and concrete, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was approved for publication in July This document supersedes SANS 975:2010 (edition 1.5). A vertical line in the margin shows where the text has been technically modified by amendment No. 6. Reference is made in D.4 and D.8 to the relevant national legislation. In South Africa this means the National Building Regulations and Building Standards Act, 1977 (Act No. 103 of 1977). Amdt 5

3 Contents Page Foreword 1 Scope Definitions Materials Physical requirements Marking Sampling and compliance with the specification Inspection and methods of test General Dimensions Straightness End squareness Hydraulic pressure test Proof load test... 8 Appendix A Applicable standards Appendix B Notes to purchasers Appendix C Guidance for the design of prestressed concrete pipes Appendix D Notes on the manufacturing processes Appendix E Information to be supplied by manufacturers Appendix F Notes on protective measures for prestressed concrete pipelines

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5 Prestressed concrete pipes 1 Scope 1.1 This specification covers prestressed concrete non-cylinder pipes (and joints) intended primarily for the conveyance of water and sewage under pressure, but does not cover the fittings for these pipes. NOTE a) Assessment of compliance with the requirements given in section 3 and 4.4 necessitates the carrying out of inspections and tests during the process of manufacture (see also note to section 6). Amdt 5 b) The standards referred to in the specification are listed in appendix A. c) Requirements that must be specified by the purchaser and those that may be agreed upon between manufacturer and purchaser are listed in appendix B. d) Guidance for the design of prestressed concrete pipes is given in appendix C. e) Notes on the manufacturing processes are given in appendix D. f) Information to be supplied by the manufacturer is given in appendix E. g) Notes on protective measures for prestressed concrete pipelines are given in appendix F. 2 Definitions 2.1 For the purposes of this specification the following definitions shall apply: acceptable acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as relevant Amdt 5 core cylindrical portion of a prestressed pipe structure around which the circumferential prestressing wire is wound defective prestressed concrete pipe or a test piece that fails in one or more respects to comply with the appropriate requirements of the specification 3