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2018 Las-Vegas : C-PVC-O, pushing limits beyond in molecular orientationAuthor(s) : Ignacio Muñoz
During the last years PVC-O has become a popular product in pipe business due to the huge improvements of mechanical properties of PVC after orientation. At the same time, CPVC has become an important choice for hot water conduits in in-house applications. Molecor has started a research program to evaluate the...
2018 Las-Vegas : Field test of Glass fiber reinforced polyethylene pipe system at soften groundAuthor(s) : Mitsuaki TOKIYOSHI, Gentaro TAKAHARA, Joji HINOBAYASHI, Toshinori KAWABATA, Takashi KURIYAMA
Glass fiber reinforced polyethylene pipes and fittings are controlled for bending characteristics (Strength and stiffness) for vertical and axial directions of pipe by spiral cross winding method. Generally, to use this method, it takes much stronger for vertical strength than axials cause of extruded direction,...
2018 Las-Vegas : Large diameter spiral wound pressure pipesAuthor(s) : Bülent Kuzkaya
Spiral wound pipes are becoming more and more important in larger diameter HDPE pipe production technology. The spiral wound structured wall pipes with profiles are already well known and used for several low or non-pressure pipe applications. This paper shows that spiral wound pressure pipes can fulfill the...
2018 Las-Vegas : Large pressure pipe system – Fully PE100Author(s) : Sverre Tragethon, Martin Andersson
Global mega trends push for investments in sewage treatment capacity & efficiency. A trend is to go for central regional treatment sites, typically remotely located from dense populated cities. This calls for high capacity pressure sewage transmission pipelines. Reliable operation is of course of paramount importance...
2016 Berlin : Bi-oriented PVC extrusion: stretching pipe performanceAuthor(s) : André Nijland
Bi-oriented PVC (PVC-O) pipes are increasingly installed on a worldwide basis for drinking water applications. This is due to the outstanding mechanical properties of PVC-O pipes, such as high strength and high ductility. Furthermore bi-oriented PVC pipes are light weight, flexible and have a low carbon footprint and...
2016 Berlin : Development of the ring fatigue testing method for composite pipesAuthor(s) : Yuji Higuchi, Rei Hyuga, Kazushi Yamada, Hiroyuki Nishimura
Recently, thermoplastic-based composite pipes have been developed in order to satisfy the higher requirements for gas and water distribution. Although the stress rupture test is now the major test method used to evaluate the long-term performance of these pipes, developing a new, convenient test method making it...
2016 Berlin : Fiber reinforced large diameter polyethylene pipeAuthor(s) : Shi Jingdong, Tan Gangqiang
FIBER REINFORCED LARGE DIAMETER POLYETHYLENE PIPE (GRPE) consists of fiberglass as the middle layer, and HDPE as inner and outer layers to provide required strength and stiffness. This composite pipe is made by spirally winding under hot melt condition, pipe pressure ranges is from 0.8 to 1.6 MPa. The fiber reinforced...
2016 Berlin : Investigations on the behavior of PE100 grades in contact with chlorine dioxideAuthor(s) : Herbert Terwyen, Roberto de Palo, Manuel Sanchez
New standards in Italy legally require that chlorine dioxide is used as a disinfectant in any new installation that treat water for human consumption. Chlorine dioxide is preferred to other disinfectants when surface water or water from rivers is used for drinking water supply and particularly Southern European...
2016 Berlin : Long length HDPE pipes from norway - From problem to a success storyAuthor(s) : Miroslav Stanimirov
Long length pipes, which are these days often used as high quality and cost efficient solution in various types of projects, are actually product of a problem that PE pipe installers were facing in early days of plastic pipe business. That problem was low reliability of PE pipe joints. The only logical solution was to...
2016 Berlin : Long-term behavior of glass fiber reinforced polyethyleneAuthor(s) : Mitsuaki Tokiyoshi, Philippe Vanspeybroeck, Kensei Inoue, Stephan Fullgrabe, Takashi Kuriyama, Toshinori Kawabata, Joji Hinobayashi
Big diameter polyethylene pipes used an important role due to superior performance (Flexibility, light weight, long lifetime and tighten joint) for water and industrial supply to several countries. However according to standard concerned Polyethylene pipes as like ISO4427 we are being used solid wall pipe with too...
2016 Berlin : Research program for assessing seismic risks on polyethylene gas pipelinesAuthor(s) : Dominique GUEUGNAUT, Charles FERNANDEZ, Romuald BOUAFFRE, Bertrand SEVRE, Florent ANGELINI
Representative earthquake loadings have been reproduced in the ENGIE Lab-CRIGEN laboratories on three PE grades, including an excavated old PE63 pipe operated during more than 35 years. Dynamic loading does not alter the pipe residual performances for the three PE families tested, as shown by both the hydrostatic...
2016 Berlin : Residual quality of excavated UPVC gas and water distribution pipelinesAuthor(s) : Frans Scholten, Ernst van der Stok, Britta Gerets, Mirko Wenzel, Mike Boege
The current condition of 35-50 years old uPVC main (110 mm) and service (32 mm) pipes for gas and water distribution was assessed. From 27 excavation sites in total about 400 segments of 1.2 meters length each were tested using many techniques. The K-value (average molecular weight) of the PVC, the degree of gelation...
2016 Berlin : Residual stress distribution in the extruded polyolefin pipesAuthor(s) : Pavel Hutař, Jan Poduška, Jaroslav Kučera, Eva Nezbedová, Andreas Frank, Jiří Sadílek, Gerald Pinter
Residual stresses can significantly influence the lifetime of polymer pipes. Therefore, realistic estimation of residual hoop stress can contribute to accurate lifetime estimations. The previously used “accurate method” is quite time consuming and needs a lot of specimens to be prepared and treated. A simplified...
