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Plastic pipe systems offer major advantages over traditional materials for stormwater applications including corrosion resistance, installation economics, operating efficiencies and reductions in maintenance costs. Iplex’s PVC-U stormwater system from DN75 through to DN375 provides a complete pipe and fittings range for stormwater disposal.

Material Properties

Mechanical Properties

The mechanical properties are for PVC-U at 20°C

Property Value & Unit
Density (Specific Gravity) 1.47
Ultimate tensile strength 52MPa
Yield Strain 5.50%
Compressive strength 66MPa
Tensile Modulus 2750MPa
Hardness Shore D 85
Poissons Ratio 0.38
Ring Bending Modulus - 3 min 3200MPa
Ring Bending Modulus - 50 yrs 1400Mpa


Thermal Properties
Property Value & Unit
Coefficient of Thermal Expansion 7 x 105/°C
Thermal Conductivity 0.138W/m.K
Specific Heat 1047 J/kg/°C
Vicat Softening Temperature 75°C

Typical Fire Resistance Properties

Property Value & Unit
Flammability Will not support combustion
Fire Index - Ignitability 8
Fire Index - Smoke Developed  8
Fire Index - Spread of Flame 0
Fire Index - Heat Evolved  1
Chemical Resistance

PVC-U pipes have high resistance to a wide range of chemical reagents. Such resistance, however, is a function of temperature, concentration and pressure.

In general, PVC-U is suitable to convey strong acids, alkalis and aqueous solutions (except those which are strongly oxidising), aliphatic hydrocarbons, fluorides, photographic and plating solutions, brine, mineral oils, fats and alcohols. The suitability of a pipeline for conveying a certain chemical will depend on such factors as the concentration of the chemical in the fluid to be conveyed, temperature, flow rate, the presence of pockets or “dead spots” in the pipeline and other factors.

View the Iplex Chemical Resistant Tool