Pots, Benjamin
New Products # 1995 Edinburgh
PVC products have suffered in the last years from attack by environmental activists. The production of PVC with its chlorine based raw material and the incineration of PVC with the suggested emission of dioxine have been used as arguments to try to curtail the use of PVC in all application areas. The PVC pipe manufacturers in Holland, united in the FKS (The Federation of Manufacturers of Plastic Piping Systems), decided in 1990 to address this problem and to show that the use of PVC in piping systems is a justifiable activity, in particular, when considering environmental issues. The first action was to avoid the possibility that used pipes and fittings coming from the demolition of buildiigs or renovation projects should find their way to waste dumps or incineration plants. Therefore, a system has been devised to collect this pipe and fitting waste and deliver it to the members of the FKS. Special techniques have been developed to provide sorted, cleaned and ground raw material suitable for the extrusion of a pipe product of acceptable quality. The coextrusion of non-pressure sewage pipe, already developed in the 1980's and introduced into the Dutch market in 1987, has provided the outlet for this waste. The coextruded pipe, up to 4500 mm,has the external compact layers in virgin PVC material whilst the intermediate layer consists of scrap material regenerated from the collected waste. This intermediate layer can be compact or foamed depending upon the application of the sewage pipe. These pipes meet national standards and international standards are being drafted. Liie cycie analysis has shown that this coextruded pipe, contrary to pp'rila : opinioc, is es environmentally friendly as the traditional concrete and clay sewage pipes.
Related papers
Author(s) : Jennifer Ravereau, Jose Teixeira Pinto, Malena Bernabeu, Jose Alacid, Jean-Philippe Le Goff, Frederic Mohier, Benjamin Rabaud
Drinking water network fittings such as valves are made of brass materials known to be robust over long periods. Due to the gradual inflation metallic raw material costs, composite plastic valves have grown in market share. Uncertainties remain, however, on their long-term reliability. The aim of this work is to...
Author(s) : Juergen Wuest, Benjamin Baudrit, Frank Dorbath, Christopher Pommer
A testing apparatus for determining the mechanical properties of electrofusion and heated tool sleeve welded joints with the mechanized linear shear test (LST) was developed. The LST-apparatus allows the recording of the force as a function of the extension / shear length. It has been proved that the linear shear test...
Author(s) : Francis Reny Costa, Anh Tuan Tran, Jeroen Oderkerk, Thomas Hjertberg, Christophe Salles, Ulf W. Gedde, Benjamin Rabaud, Flavia Zraick
The premature failure of polyethylene pipes in contact with high chlorine and chlorine dioxide, used as residual disinfectants in drinking water distribution, remains an area of concern for water companies particularly in regions where temperatures are regularly or seasonally high. Multiple factors can amplify the...
Author(s) : Benjamin Baudrit, Dietmar Kraft, Martin Bastian and Peter Heidemeyer
In 2008, the Sueddeutsche Kunststoff-Zentrum (SKZ), a testing and R&D plastics institute based in Wuerzburg (Germany), began in cooperation with the company WIDOS, a welding machine manufacturer based in Ditzingen (Germany), to develop a testing device for establishing the mechanical properties of joints executed by...
Author(s) : Benjamin
Current practice and experience can give valuable information to those applying plastics to gas distribution systems for the first time. However, it is essential that this information only be applied with appreciation of the factors which should determine the choice of material and system for a particular...
Author(s) : Mutter & Benjamin
Fig, 1 gives the last known figures (1-1-73) of materials used in the Dutch gas network at 8 bar and lower (under supervision of the gas boards). The figure shows that during the last 18 years more than 20,000 km of uPVC pipes have been laid, and that since 1966 about 3,200 km of high impact PVC have been applied. The...
Author(s) : Benjamin
The Dutch Gas Institute have made two surveys of the use of plastic pipes in the Nethelands. The first survey was made in 1964 and the second survey was made in 1968. The most important facts of these two surveys are given in Table 1, together with an estimate of the current situation. It is estimated that 80% of the...
Members of the Association
