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Pipe Material Comparison: HDPE & PP to other Plastic Pipe Material

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In any piping project, the proper selection of pipe material is critical and depends on a number of different factors such as application, environment and service conditions. In this article, we provide a comprehensive Pipe Material Comparison Chart which specifically looks at High Density Polyethylene (HDPE) and Polypropylene (PP) and how these compare to other plastics pipe materials on the market today, including;

  • Polyvinyl Chloride (PVC)
  • Chlorinated Polyvinyl Chloride (PVC-C)*
  • Polybutylene*
PROPERTY HDPE PP PVC PVC-C PB
Surface feel Waxy Waxy Smooth Smooth Waxy
Appearance (water pipes) Black Pale Grey-Beige Blue Grey-Beige Black
Sound produced when dropped Medium Clatter High Clatter High Clatter High Clatter Dull Thud
Combustibility & appearance of flame Bright flame, drops continue to burn while falling Bright flame, drops continue to burn while falling Carbonises in flame, extinguishes away from flame Carbonises in flame, extinguishes away from flame Bright Flame, drops continue to burn while falling
Odour of smoke after flame is extinguished Like Candles Like Resin Pungent like Hydrochloric Acid Pungent like Hydrochloric Acid Like Candles, but more acrid than HDPE
Nail Test Impression made by finger nail Impression possible Very slight impression possible Impression not possible Impression not possible Impression easily produced
Special features - - - - Smears when sawn
Floats in water Yes Yes No No Yes
Notch sensitivity No Slight Yes Yes No
Weather resistance Stabilised good Stabilised good Stabilised good Stabilised good Stabilised good
Method of permanent joining Fusion Fusion Solvent Cement Solvent Cement Fusion
Suitable for mechanical jointing Yes Yes Yes Yes Yes
Stress crack sensitivity with regard to jointing for safe media, e.g. water Some Slight None None None
Linear expansion (mm/m °C) 0.2 0.15 0.08 0.07 0.12
Thermal conductivity (kcal/mh °C) 0.40 0.19 0.14 0.14 0.20
Specific heat (kcal/kg °C) 0.42 0.4 1.23 0.23 0.47
Specific weight (kg/cm3 °C) 0.955 0.905 1.42 1.5 0.92
Tensile strength at 20°C (kp/cm2) 240 320 550 550 200
Modulus of elasticity at 20°C (kp/cm2) 8 000 15 000 30 000 30 000 5 000

* Currently not manufactured in South Africa

For more information on Marley’s range of MEGATUFF HDPE Pipe solutions, Click Here 

 

Contact Marley Pipe Systems

Marley Building Division
t. +27 11 739 8600
f. +27 11 739 8680

Marley Mining & Industrial Division
t. 0861 MARLEY (627539)
t. +27 12 045 0997

e. info@marleypipesystems.co.za

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