Lifetime Analysis # 2001 Munich
The lifetime of plastic pipes has been studied at Bodycote Polymer AB (formerly Studsvik Polymer AB) for more than 27 years. This paper presents some of the factors found to control the lifetime of plastic pipes. How to extrapolate the lifetime of plastic pipes will be presented and discussed. A question will also be raised with regards to the test method used in order to determine the lifetime for multi-layer pipes based on an aluminium layer.
Author(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...
Author(s) : Lars Jacobsson, Hans Andersson and Linda Karlsson
Problems sometimes occur in tightness testing of plastic pipelines using pressurized water and accounting for the diametrical expansion, particularly so for larger sizes and higher pressure rating. Pipelines that are in fact tight enough for acceptance are rejected when first tested. A study consisting of two parts...
Author(s) : Lars Jacobsson, Hans Andersson, Daniel Vennetti and Sven-Erik Sällberg
Leakages are reported in flange joints of large pipelines for water supply although mounted according to recommended practise. FEM analyses and full scale experiments have been performed in order to better understand the functioning of the joints. The objectives were to find out about the sensitivity to mounting and...
Author(s) : Lars Selling and Ingrid Andersson, Christophe Salles and Lars Höjer
Kungsors Plast AB, in co-operation with Borealis, has pioneered the underground plastic piping for petrol filling stations with the first polyethylene piping used by Shell Sweden in 1981. The retail sector with petrol filling stations has used PE-based underground piping since the early 1980s. With increased awareness...
Author(s) : Andersson
The lifetime of plastic pipes has been studied at Bodycote Polymer AB for more than 30 years. This paper will compare two test methodologies for evaluating multi-layer pipes. An attempt will be made to investigate antioxidant consumption as a function of exposure time for three different PE based multi-layer pipes...
Author(s) : Ifwarson, Andersson
This paper presents experimental data for PEX, PEM, PP and PVC pipes exposed to different chemicals. More than 150 plastic pipes of PEX, PEM, PP and PVC have been pressure tested with different chemicals. The chemicals used are; 97% Sulfuric acid, 100% Acetic acid, 30% Sodium hydroxide and a solution of 50%...
