Plastic Pipes

Plastic Pipes transport liquids, gases and compressed air in industrial and building-services systems. The category covers pipes in materials including HDPE and PP-RCT; fittings and valves belong to separate categories.

HDPE pipes are flexible and behave like hose at smaller diameters. Added carbon particles provide UV resistance, and the material can be processed in several ways. PP-RCT pipes have a standard glass-fibre layer that limits the expansion coefficient and allows favourable support spacing.

HDPE pipes are used in water treatment, marine applications, cooling and the chemical-process industry. PP-RCT pipes are used in HVAC, chilled water, compressed air and marine water systems. Aquatherm Blue applications also include heat sources, swimming pools, heat pumps, geothermal systems and data centres.

Select the pipe material according to the medium, temperature and chemical resistance. Then check diameter, SDR class, pressure duty, linear expansion and joining method. PP-RCT is available from 20 to 630 mm in SDR 7.4, 9, 11 and 17.6; HDPE is supplied mainly as SDR 11 and SDR 17.

Key attributes are material, diameter, SDR class, pressure duty, medium, temperature, chemical and UV resistance, expansion and welding method.

Frequently asked questions

PP-RCT pipes suit heating and chilled-water systems and have a maximum permissible temperature of 90 °C. PP-H and PVC-C also support higher-temperature applications; match the material and system parameters to the medium.

Aquatherm Blue plastic pipes are joined by thermal fusion. Sizes from 20 to 125 mm use socket fusion. Diameters from 160 mm use butt-welded connections.