The new standard formally defines a category of flexible, factory-manufactured, aramid fiber-reinforced pipe liners designed for non-bonded, loose-fit installation in pressure pipe rehabilitation applications. This marks a major step forward for municipalities and engineers seeking a proven, high-performance alternative to traditional cured-in-place pipe (CIPP) and conventional sliplining methods.
Unlike resin-cured liners, the Primus Line® system is a thermoplastic composite pipe reinforced with aramid fibers. It is installed without bonding to the host pipe, offering fast, minimally invasive rehabilitation for pressure pipelines. ASTM F3708 validates this unique class of technology and enables it to be confidently specified under a recognized industry standard.
“Until now, solutions like fabric-reinforced thermoplastic liners were often misclassified or lumped into standards that didn’t really fit,” says Tim Back of Back Municipal Consulting, a full service consulting and engineering company.
