Deformations in Buried Flexible Pipes [PVC, PE]

Author(s) : Anders Andtbacka, Frans Alferink, Peter Sejersen 2018 Las-Vegas

The behavior of buried plastic pipes is already well described in standards and technical specifications and as well as proven in real life conditions. Plastics pipes in diameters up to around 400 mm are already in use for more than 60 years and pipes with larger diameters for more than 20 years now. All with good...

Author(s) : Frans Alferink 2016 Berlin

PVC pipes for buried applications for water, sewer and gas, has developed an excellent track record. PVC is very inert, has a high resistance against permeation of soil contaminations and gas components and meanwhile has a long proven lifetime. Next to that, the lifecycle costs of buried PVC pipe systems are amongst...

Author(s) : André Nijland, Frans Alferink 2014 Chicago

PVC-U is used around the globe for potable water supply and sewer applications. This is due to its strength and stiffness as well as to its excellent flow properties. PVC-U shows an excellent performance in protecting the potable water quality. And it is registered that failure rates of PVCU pipelines are very low....

Author(s) : Emiel Drenth, Ton Bor, Roy Visser and Mannes Wolters 2012 Barcelona

Various non-destructive methods, based on different physical principles, were investigated for their ability to differentiate between uPVC pipes having various levels of gelation. It was found that the micro-hardness method was not able to differentiate between uPVC samples of different levels of gelation. A...

Author(s) : Frans Alferink and Jos Oosterik 2012 Barcelona

PVC-O pipes were already introduced in the mid-seventies, but why did it take until the beginning of this century before this high quality pipe product really expanded successfully into the water markets? The second part of this paper will present an answer to that question. Feedback from various pipe markets...

Author(s) : Frans Scholten and Mannes Wolters 2010 Vancouver

PA11, PA12 and plasticized PA6.12 pipes are interesting candidates for gas transport and distribution pipelines at 16 bars pressure, which is beyond the maximum pressure for PE100 pipeline systems (10 bars). However, PA pipelines are not meant as an alternative to PE pipelines, but to steel pipelines. Therefore,...

Author(s) : Wolters, Wikkerink 2006 Washington DC

The use of plastic pipeline materials in gas distribution systems is still increasing. Presently PE and high impact PVC are the dominating materials in gas distribution networks up to 4 bar. Most of these networks operate at these pressures, only a limited part of the network operates at higher pressures, up to 10...

Author(s) : Alferink 2006 Washington DC

Plastics pipes products are more and more appreciated in sewer schemes throughout the world. The advantages of thermoplastics, like the good resistance against sewer environments and the possibility to built complete tight systems are many times the drivers to use thermoplastic pipes and chambers. Plastics chambers...

Author(s) : Janson, Alferink, Wolters 2004 Milan

This paper presents the results of work that was performed at the request of TEPPFA , The European Plastics Pipes and Fittings Association, on the issue of “Combined loading” (external and internal loading) of buried thermoplastics pressure pipes. The work is of great importance for users and designers of...

Author(s) : Meijering, Wolters, Hermkens 2004 Milan

One of the options for a low-pressure gas distribution system is the use of ductile PVC pipes and joints. The long-term performance of ductile PVC pipes has been reported in a number of previous studies. In this paper the long-term performance of the socket joints, in which elastomeric (NBR) sealing rings are used,...