News
Qualitätssicherung für grabenlos verlegbare Rohre aus Polyethylen
In his presentation at the 2nd Deutschen Symposium für grabenlose Leitungserneuerung (German Symposium on Trenchless Pipeline Renewal), Dr. J. Hessel outlined six years of quality assurance for polyethylene pipes. He discussed the entire process, from raw material testing to advanced aging tests, which ensure consistently high quality in the pipes.
Jahresversammlung der DVS Arbeitsgruppe W 4 "Fügen von Kunststoffen", SKZ Würzburg
At the annual meeting of the DVS Working Group W 4, Dr. Hessel and Johannes Grieser presented on the long-term strength of polyethylene welds and the development of standardized welding methods for PE 100 pipes.
11th Wiesbadener Kunststoffrohrtage (Wiesbaden Plastic Pipe Days)
At the 11th Wiesbadener Kunststoffrohrtage (Wiesbaden Plastic Pipe Days), Dr. J. Hessel presented scientific confirmation of the 100-year service life of polyethylene pressure pipes, emphasizing the importance of standardized welding procedures to ensure quality and durability.
100 Jahre Nutzungsdauer von Rohren aus Polyethylen (Rückblick und Perspektive)
Dr. J. Hessel's study confirms the 100-year service life of polyethylene pipes for drinking water supply, emphasizing the reliability of modern extrapolation methods in predicting material properties.
Checking of the required long-term tensile welding factor and the minimum time of welded joints made of polyethylene
The publication explains the testing procedure described in Supplement 3 of DVS Guideline 2203-4 for evaluating thermoplastic weld joints, which eliminates the need for unwelded reference samples and provides additional information on minimum service life.
