NF EN 641 : 1995

Committees responsible
National foreword
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 pipe
3.2.1 Reinforced concrete pipe, steel cylinder type,
       not pretensioned
3.2.2 Reinforced concrete pipe, steel cylinder type,
       pretensioned
3.3 Reinforcement
3.3.1 Circumferential reinforcement
3.3.2 Longitudinal reinforcement
3.3.3 Positioning and cover to steel
3.4 Concrete and mortar
3.4.1 Mix design
3.4.2 Concrete strength
4. Factory testing
4.1 Concrete test
4.2 Pipe test
Annex A (informative) Typical design procedure excluding
pretensioned type pipe
Annex B (informative) Typical design procedure for pre-
tensioned type pipe

Specifies the requirements and manufacture of reinforced concrete pressure pipe cylinder type that is not prestessed. Covers pretensioned concrete cylinder pipe in which the reinforcement is wrapped, under low tension, directly on to the steel cylinder.