Test report confirms outstanding performance of 40-year-old GRP pipe in Norway

A technical assessment of a 40‑year‑old GRP pipe from Jøsenfjorden, Norway, has confirmed remarkable long‑term performance after four decades of continuous operation.

The pipe underwent ultrasonic and structural evaluations, which showed no signs of cracking, deformation, or corrosion. It has retained its designed stiffness and continues to operate close to its original design capacity, confirming the long-term durability and reliability of GRP composite technology. These findings validate what engineers design for: infrastructure that performs reliably over generations.

Long‑term case studies like Jøsenfjorden underline why GRP is a sustainable and resilient choice for modern water and wastewater systems. With exceptional ageing behaviour and minimal maintenance needs, GRP pipes continue to support communities with safe, reliable, and future‑proof infrastructure.