HDD upgrades natural gas pipeline
Publicerad: 22 mars, 2019
Pulling in the GRP surface protected pipe. Photo Trenchless International
A European project has used horizontal directional drilling (HDD) to install steel pipes lined with glass reinforced plastic (GPR).
When the operation of a natural gas pipeline underneath a dyke separating the Rhine River and the Rheinpark Stadium in Vaduz, Liechtenstein was deemed high-risk, BKP Berolina used steel pipes lined with 5 mm thick GRP to upgrade the line.
HDD was used to install the 656 m long section of DN 250 pipe at a depth of 15 m to meet the specified minimum distance of 30 m from the Rheinpark Stadium.
GRP is a heavy-duty protection layer made of glass fibres and styrene-free vinyl ester resin to ensure maximum mechanical abrasion resistance for trenchless pipe installation.