Air pipes

PU foam insulation allows for thinner, more flexible pipes

In collaboration with the Swiss company Brugg Pipes, the chemical company Huntsman has developed a polyurethane foam (PU) with insulating properties which allows the production of very flexible pre-insulated pipes suitable for the connection of geothermal heat pumps and heating units. local to home and business networks. buildings. Brugg Pipes has applied Huntsman’s Suprasec Daltofoam TE system in its Flexstar products launched in January 2022.

The Suprasec Daltofoam TE system produces a foam with better insulation properties (low lambda value) than polyethylene (PE), according to Huntsman, which has its European headquarters near Brussels. The insulation layer is thinner than PE but still provides good overall insulation performance (low U-value). In addition, thinner and lighter pipes are more flexible, which means they are faster and easier to transport and install.

Demand for geothermal heat pumps that capture hot air outdoors and transport it indoors is growing in North America, Europe and North Asia, as they have a lower carbon footprint than alternative technologies. , Huntsman said.

“We had wanted to enter the heat pump market for some time and needed a competitive insulation solution that would allow us to quickly gain traction in this market,” said Bora Yayla, Marketing Manager at Brugg Pipes. . “Key to our success has been getting a good degree of flexibility into our pre-insulated pipes to ensure easy handling without compromising insulation performance. More flexible pipes have a smaller wrap radius, which means they are easier to transport and faster for heating engineers and installers to install in confined spaces or where there are sharp turns and building entry points to navigate.Working with Huntsman, we We have achieved all of our project goals, and orders for Flexstar are now being placed around the world,” said Yayla.

Flexstar pre-insulated pipes are designed specifically for use in local heat pump systems and are manufactured using a patented production process (according to DIN EN 15632-2 and DIN 4726) which ensures excellent watertightness of delineation and longitudinal and a good barrier to oxygen diffusion, Brugg said.