The polyethylene used for the pipes production has been developed since the 50s through subsequent generations (from PE32 up to PE100), becoming one the most used materials in the world for the construction of underground networks conveying water and gas, thanks to its excellent hydraulic and mechanical performances as well as its installation and maintenance lower costs compared to steel, cast iron, stoneware and cement. The resistance to the slow growth of frail cracks (Slow Crack Growth), caused by cuts or superficial abrasion triggered by both the asperities of the subsoil and laying operations, as well as due to the effect of local loads focused on the outer surface of the pipe, resulting in the appearance over time of fragile cracks along the inner wall, it’s a key factor for the long-term reliability of any network.
The polyethylene PE100 RC safeguards the long-term functionality of ducts, minimizing the risk of fragile cracks occurrence (the first cause of HDPE pipes breakage), preventing the need for repairing and maintaining interventions over the useful life of the project.
In 2005, the DVGW started a research project for the development of a new standard, which was attended, under the auspices of the German Certification Body DIN, by multinational corporations producing polyethylene, European manufactures of HDPE pipes, general contractors, scientific organizations and testing laboratories.
In 2009 the PAS (Publicly Available Specification) 1075 was released with the purpose of establishing, in addition to the existing regulations, proprieties, requisites and testing procedures for polyethylene pipes to be used in the alternative laying methods. Prerequisite of the PAS 1075 is that the materials can be labelled “PE 100-RC” only if they comply with the provisions of the PAS 1075 itself and are certified by a third-party accredited certification body.