BS 4625:1970

Cooperating organizations
Foreword
Specification
1. General
1.1 Scope
1.2 Definitions
1.3 Cement
1.4 Aggregate
1.5 Concrete
1.6 Bitumen or other similar protective coatings
1.7 Steel for cylinders and fittings
1.8 Steel for reinforcement
1.9 Rubber gaskets
1.10 Moulds and manufacture
1.11 Maturing of pipes and fittings
1.12 Permissible deviation from nominal internal
      diameter
1.13 Permissible deviation from manufacturing internal
      diameter
1.14 Lengths
1.15 Joints
1.16 Design
1.17 Facilities for sampling and testing
1.18 Manufacturer's certificate
1.19 Marking of pipes and fittings
2. Prestressed concrete cylinder pipes
2.1 Steel socket and spigot rings
2.2 Fabrication of steel cylinders
2.3 Concrete core
2.4 Circumferential prestressing
2.5 Works hydrostatic proof requirements
2.6 Cement mortar cover coating
2.7 Design
3. Prestressed concrete non-cylinder pipes
3.1 Concrete core
3.2 Pretensioning and release of longitudinal wires
3.3 Circumferential prestressing
3.4 Works hydrostatic proof requirements
3.5 Cement mortar cover coating
3.6 Design proof requirements
3.7 Acceptance of design
Appendices
A. Technical specification for fittings
B. Nominal internal diameters
C. Information to be supplied with an enquiry or order
    for cylinder and non-cylinder pipes
D. Certificate of compliance
E. Works hydrostatic proof test
F. Design proof tests
Figure
1. Testing device for applying three-edge crushing
    load and internal hydrostatic pressure

Definitions, cement, aggregate, concrete, coatings, reinforcement, gaskets, moulds, maturing, permissible deviations and marking. Prestressed cylinder and non-cylinder pipes (prestressing and tests). Appendices cover works test, design tests and the technical specification for fittings.