Plastics piping systems for civil works for water
The main types of plastic material pipes used in civil works for transporting water depending on the application are as follows:
Buried or above ground conveyance of water or sewage under pressure. EN ISO 1452-1, -2, -3, -5
Unplasticized poly (vinyl chloride) (PVC-U)
Tests:
Suitability for use:
- Negative pressure leaktightness, angular deviation and deformation
- Internal leaktightness with angular deviation
- Long-term leaktightness under internal hydraulic pressure
Dimensional:
Physical properties:
- Longitudinal reversion. Oven air method.
- Vicat softening temperature
- Visually assessing the effects of heating.
- Determination of opacity.
- Dichloromethane resistance at specified temperature (DCMT)
Material properties:
- Determination of density of non-cellular plastics. Immersion method.
- Determination of residual vinyl chloride monomer. Gas-chromatographic method.
Mechanical Properties
- Resistance to internal pressure
- Resistance to external blows. Round-the-clock method.
- Determination of tensile properties.
Buried drainage and sewage without pressure. EN 1401-1
Unplasticized poly (vinyl chloride) (PVC-U)
Tests:
Suitability for use:
Dimensional:
Physical properties:
- Determination of processing temperature
- Longitudinal reversion. Oven air method.
- Vicat softening temperature
- Visually assessing the effects of heating.
- Dichloromethane resistance at specified temperature (DCMT)
Material properties:
Mechanical Properties
- Resistance to external blows. Staircase method.
- Resistance to internal pressure
- Resistance to external blows. Round-the-clock method.
- Determination of tensile properties.
- Determination of ring stiffness.
Buried drainage and sewage without pressure (structured wall). EN 13476-1, -2, -3
Unplasticized poly (vinyl chloride) (PVC-U)
Tests:
Suitability for use:
Physical properties:
- Oven test.
- Determination of processing temperature
- Longitudinal reversion. Oven air method.
- Vicat softening temperature
- Visually assessing the effects of heating.
- Dichloromethane resistance at specified temperature (DCMT)
Mechanical Properties
Polyethylene (PE):
Tests:
Suitability for use:
Physical properties:
Material properties:
Mechanical Properties
- Resistance to external blows. Round-the-clock method.
- Determination of creep ratio.
- Determination of ring stiffness.
Polypropylene (PP)
Tests:
Suitability for use:
Physical properties:
- Determination of processing temperature
- Determination of the melt mass-flow rate (MFR) of thermoplastics.
- Determination of the oxidation induction time.
- Longitudinal reversion. Oven air method.
- Visually assessing the effects of heating.
Mechanical Properties
- Determination of ring flexibility.
- Resistance to internal pressure
- Resistance to external blows. Round-the-clock method.
- Determination of creep ratio.
- Determination of ring stiffness.
Conveyance of water or sewage under pressure. EN 12201-1, -2, -3, -5 / ISO 4427
Polyethylene (PE)
Tests:
Suitability for use:
- Leaktightness in negative pressure conditions
- Resistance to pull-out under constant longitudinal force
- Leaktightness tests method with internal hydraulic pressure for joints subject to flexure
- Determination of the tensile strength and failure mode of test pieces from a butt-fused joint
- Peel decohesion test for electrofusion (DN≥90).
- Crushing decohesion test for electrofusion.
Dimensional:
Physical properties:
- Determination of the melt mass-flow rate (MFR) of thermoplastics.
- Determination of the oxidation induction time.
- Longitudinal reversion. Oven air method.
Material properties:
- Determination of volatile content
- Determination of the degree of pigment or carbon black dispersion. Compression method.
- Determination of carbon black content
- Determination of density of non-cellular plastics. Immersion method.
Mechanical Properties
- Resistance to rapid crack propagation (RCP) Small scale steady-state test (S4 test).
- Resistance to slow crack propagation on notched pipes (notch test).
- Determination of tensile properties.
Conveyance of water under pressure. ISO 16422
Unplasticized oriented poly (vinyl chloride) (PVC-O)
Tests:
Suitability for use:
- Negative pressure leaktightness, angular deviation and deformation
- Internal leaktightness with angular deviation
- Long-term leaktightness under internal hydraulic pressure
Dimensional:
Physical properties:
- Determination of processing temperature
- Longitudinal reversion. Oven air method.
- Vicat softening temperature
- Determination of opacity.
Mechanical Properties
- Resistance to internal pressure
- Resistance to external blows. Round-the-clock method.
- Determination of tensile properties.
- Determination of ring stiffness.
Buried or above ground supply of water, irrigation, sewage and drainage under pressure. EN 17176-2, -5 / CEN/TS 17176-3
Unplasticized oriented poly (vinyl chloride) (PVC-O)
Tests:
Suitability for use:
- Negative pressure leaktightness, angular deviation and deformation
- Internal leaktightness with angular deviation
- Long-term leaktightness under internal hydraulic pressure
Dimensional:
Physical properties:
Material properties
Mechanical Properties