NEN EN 295-7 : 2013

1 Scope
2 Normative references
3 Definitions
4 Pipes
4.1 Materials and manufacture
4.2 Measurement of dimensions
4.3 Minimum bore and internal diameter
4.3.1 Minimum bore
4.3.2 Internal diameter
4.3.3 Invert conformity
4.4 External diameter
4.5 Length
4.6 Squareness of ends
4.7 Deviation from straightness
4.8 Strength
4.8.1 Crushing strength (FN)
4.8.2 Compressive strength
4.8.3 Jacking strength
4.8.4 Design jackding load
4.8.5 Maximum working jacking load
4.8.6 Bending tensile strength
4.8.7 Fatigue strength under pulsating load
4.9 Watertightness of pipes
4.10 Chemical resistance
4.11 Hydraulic roughness
4.12 Abrasion resistance
5 Joint assemblies
5.1 Jointing materials
5.1.1 Rubber sealing elements
5.1.2 Polyurethane sealing elements
5.1.3 Stainless steel sleeves
5.1.4 Polypropylene sleeve couplings
5.1.5 Materials of other components
5.2 Packing rings
5.3 Watertightness of joints
5.3.1 Internal pressure
5.3.2 External pressure
5.4 Angular deflection
5.5 Shear resistance
5.6 Chemical and physical resistance to effluent
5.6.1 Joint assemblies
5.6.2 Jointing materials
5.7 Thermal cycling stability
5.8 Long-term thermal stability
6 Sampling
6.1 General
6.2 Compressive and jacking strength
7 Designation
8 Marking
8.1 Pipes
8.2 Limitation
9 Quality assurance
Annex A (normative) Compressive strength
Annex B (normative) Calculation of maximum working
        load
Annex C (normative) Invert conformity
Annex D (normative) Squareness of ends