Sewage & drainage pipes (PO)

In the past, cast iron or vitrified clay were used for sewage pipe systems. Now, plastics pressure and non-pressure solid wall, corrugated or multi-layer pipes are used. For public sewage systems (DN 200-800 and larger), the main raw materials are PE, PP or PVC. Not only do they provide an excellent price/performance ratio, but they also have a minimum 50-year service life.

For domestic waste water disposal, the pipes (DN 100-200) must be abrasion and corrosion-resistant as well as resistant to domestic waste water and temperatures of up to 95°C. Due to its extreme stiffness, PP is the preferred material for waste water pipes, especially for larger diameters.

Drainage pipes are required to meet more and more stringent demands imposed for underground drainage. Building drainage systems drain rain water and snowmelts via gutters and downpipes to the main building site drainage. In road construction, the surface water from rain or snowfall is collected and absorbed by drainage systems, thus preventing structural damage and danger to traffic. Pipes with smooth inner surfaces and circular profiles on the outside are in use particularly in road and tunnel construction, but also in building site drainage.

PO pipes are frequently used in railroad track, airport and tunnel construction, where they are exposed to high static and dynamic loads. For bicycle lanes and footpaths, the pipes are made of PE.