Huntsman, in close collaboration with BRUGG Pipes, has developed a next-generation polyurethane foam system that can be used to create flexible, thermally efficient, pre-insulated pipes for connecting ground-source heat pumps and local heating units to domestic and commercial buildings. The closed cell SUPRASEC/DALTOFOAM TE system produces foam with better insulation properties (low lambda value) than PE. The result is pipes with a thinner layer of insulation compared to PE that still deliver good overall insulation performance (low U-value). In addition, thinner, lighter pipes are more flexible, meaning they are quicker and easier to transport and install, as well as reduce heat loss.