Related papers
2010 Vancouver : Influence of shock pressure testing on the service life of HDPE piping systemsAuthor(s) : Ulrich Schulte, Heinz Vogt, Hans-Friedrich Enderle, Dieter Lilge
The completion of a pressure test is mandatory for all new pipe systems. Its purpose is to demonstrate the overall leak-proof condition of the system. In the course of this test, HDPE pipes of SDR 17 class are exposed to high stress loads. In an extensive test programme, all failure mechanisms observed in long-term...
2006 Washington DC : 50 Years of Pipes made from High Density PEAuthor(s) : Schulte
After the discovery of the low-pressure process for the production of polyethylene with the aid of Ziegler catalysts, only another year went by before pipes were being extruded in highdensity polyethylene. In the same year, at the end of 1954, Hoechst had already begun to carry out long-term failure tests on HDPE...
2004 Milan : HDPE PIPES ARE MORE RESISTANT TO OXIDATION THAN THE OIT INDICATESAuthor(s) : U. Schulte
There are three factors that can influence the service life of plastics pipes: mechanical overloading, environmental stress cracking and degradation caused by oxidation at high temperatures. This article deals primarily with the degradation that occurs during processing at high temperatures and also – as an...
2001 Munich : Ensuring the Highest Quality in PE 100 Pressure Piping MaterialsAuthor(s) : Scheelen, Tauber, Berndtson, Lackner, Bertrand, Bilda
Founded on February 24, 1999, the PE100+ Association is an industry organisation of
several polyethylene (PE) manufacturers whose objective is to guarantee consistent quality
at the highest level in the production and use of PE 100 pipe material.
The authors describe the current situation in terms of European...
2001 Munich : Pipeline Systems Made of Plastics Pipes Extruded from PEAuthor(s) : Schulte
Lifetime expectations play a major role when selecting materials for pressure pipes.
Information on the service life of a piping system made of polyethylene can be gained from
the creep rupture tests at various temperatures being evaluated by standardized extrapolation
methods (ISO/TR 9080). With the help of test...
1998 Gothenburg : Fresh Water Supply System of Nonmetallic Materials for Large AircraftAuthor(s) : Otto, Schulte, Feldmann
The development of a large aeroplane with two decks and a capacity of more than 500 passengers yields numerous problems in structural design, logistics, passenger systems etc., including special requirements for the fresh water supply system. The reliability of this system is very important, especially during long...
1995 Edinburgh : Advanced Polymerization Process for Tailor-Made Pipe ResinsAuthor(s) : Berthold, Boehm, Enderele, Groebel, Lueker, Lecht, Schulte
Recently Business Unit Polyethylene of Hoechst AG developed a Ziegler-catalyst-system
providing very high catalyst activity even in presence of high hydrogen concentrations. The
catalyst is applied to an appropriaie Z-stage-polymerization process. This technology is
carried out in a modern, fully automated production...
Brittle Failure Regime in Pressurized HDPE Pipes RevisitedAuthor(s) : Men, Lilge, Enderle, Rieger
HDPE Pipe Application in Alpine RegionsAuthor(s) : Schulte
Thermal Ageing of PE 100 Pipes for Accelerated Lifetime Prediction under Service ConditionsAuthor(s) : Vogt, Enderle, Schulte, Hessel
