Hessel, Lueghamer, Tsunaga
# 2004 Milan
Case histories of large diameter heavy wall polyolefine pipe installations for water supply in Japan are presented. The different methods for heated butt welding procedures for polyethylene are compared. The test methods to assess the performance of the welds are described and the failure mechanisms are discussed. Basing on experimental results the long term performance of a butt welded polyethylene pipe is predicted for a service life of more than 100 years.
Author(s) : Ulrich Schulte, Dr. -Ing. Joachim Hessel
In order to protect the Austrian lakes effectively against the discharge of effluent, a 13 km long pressure pipeline made of high density polyethylene was laid on the bottom of Lake Ossiach back in 1971. The DN355 to DN200 pipes were produced from a first generation HDPE-compound. The classification would have been...
Author(s) : Norbert Jansen, Albert Lueghamer
Demand for polyethylene (PE) pipe continues to grow on a global basis. The performance properties of this tough, durable piping material are widely recognized by the engineering and design community on a worldwide scale and the range of applications expands. The evolutionary trend in PE piping systems has been very...
Author(s) : Albert Lueghamer, Markus Haager, Peter Eitzenberger
Ultra pure water (UPW) is an important resource in several industry sectors. A project in The Netherlands is presented where a pipeline for the transportation of UPW was recently built using PP pipes with a diameter of 280 mm (SDR 17.6). The project was unique in several ways. While typically UPW piping systems are...
Author(s) : Troughton, Brown, Hessel, Piovano
As part of the Polytec Systems European-funded project, electrofusion (EF) joints in polyethylene (PE) pipe, containing different flaws, have been subjected to various standard and non-standard, long-term and short-term, coupon and whole pipe tests. The results were compared to determine which tests could discriminate...
Author(s) : Tsunaga, Matsunami, Sato, Nakata
By applying the cross-linked EF to the cross-linked PE(PEX) pipe \vhicli has a composite structure, the reliability of hot water piping system under severe environment lias significantly increased. A continuous use for approsimately 30 years under severe conditions such as 80 "C. and I MPa becomes possible. In this...
Author(s) : Hessel
Author(s) : Haager, Gruber, Lueghamer, Nitsche
Author(s) : Hessel
Author(s) : Vogt, Enderle, Schulte, Hessel