EN 642:1994

Foreword
0. Introduction
1. Scope
2. Materials
3. Design and fabrication of pipe
   3.1 General requirements
       3.1.1 General
       3.1.2 Wall thickness
   3.2 Design of pipes
       3.2.1 General
       3.2.2 Design requirements
   3.3 Reinforcement
   3.4 Concrete and mortar
       3.4.1 Mix design
       3.4.2 Concrete strength
   3.5 Prestressing
       3.5.1 Longitudinal prestressing
       3.5.2 Circumferential prestressing
       3.5.3 Multiple layers
   3.6 Curing
4. Factory testing
   4.1 Concrete test
   4.2 Hydrostatic test
       4.2.1 General
       4.2.2 Cylinder pipe
       4.2.3 Non-cylinder pipe
       4.2.4 Test pressure
   4.3 Permeability test on coating
       4.3.1 Test purpose
       4.3.2 Test frequency on products
       4.3.3 Testing equipment
       4.3.4 Test method
       4.3.5 Test results
       4.3.6 Test acceptance criteria
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 guidance for prestressed concrete
                      cylinder pipes
Annex D (informative) Design guidance for prestressed concrete
                      non-cylinder pipes

This standard covers the requirements and the manufacture of prestressed concrete cylinder pressure pipes and fittings in sizes from DN/ID 500 to DN/ID 4000 inclusive. Larger sizes could be manufactured based on the concepts of thisstandard. These types of pipes are designed for the internal pressure, external loads and bedding conditions designated by the purchaser.