News

Notched Pipe Test (NPT) on pipes OD 315 x 18.7 (SDR17) following DIN EN ISO 13479

The Notched Pipe Test performed on pipes with an outside diameter (OD) of 315 mm is uncommon but feasible. Owing to the size of the test specimens, the preparation of standard-compliant notches, the pressure-tight sealing of the specimens and the immersion in the test liquid represent significant technical challenges.

Innovative PE 100-RC piping systems for a sustainable infrastructure

PE 100-RC pipes offer a durable and sustainable solution with a lifespan of several hundred years. Trenchless installation reduces costs by up to 60%. This seminar covers key planning, testing, and end-user benefits.

IFAT Munich 2024

May 13-17, 2024
We attended the world’s leading trade fair for water, sewage, waste, and raw materials management as visitors.

High-density polyethylene (HDPE) lake pressure pipeline: Remaining service life after 47 years of operation in Lake Ossiach

In 1971, a high-density polyethylene (HDPE) pressure pipeline was installed in Lake Ossiach to efficiently discharge wastewater. Investigations and tests indicate that this pipeline can continue to operate for at least another 50 years, even though it has already reached its 50-year service life. Advances in HDPE materials and improved design standards could potentially extend its lifespan even further.

Long-term behavior of electrofusion joints in polyethylene pressure pipelines

Long-Term Behavior of Electrofusion Joints in PE Pressure Pipes: Circumferential cracks arise from stress concentrations. We recommend using an electrofusion joint factor of 0.4 in calculations, with PE 100-RC suitable for compensation. Defects often result from insufficient surface preparation, and experimental investigations reveal cracks across all manufacturers. It is essential to consider the electrofusion joint factor in PE pipe systems.