Production lines for flexible PU preinsulated pipes
The need for district heating/cooling pipes has been growing rapidly. Uponor Infra Technology has delivered several district heating pipe manufacturing lines around the world. The continuous pipe foaming process is one of various relatively new advanced production techniques. As opposed to the conventional discontinuous pipe filling technique, it allows reduction of foam filling density and casing pipe thickness that can result in substantial cost savings for the pipe manufacturer. Automated manufacturing can also cause savings in labour costs. Uponor Infra Technology provides production lines for PU insulated flexible pipes ranging from 16 up to 110 mm. Inner pipe, the carrier pipe (PE-RT, PE, steel etc.) is continuously fed into a moulding section, together with a polyurethane foam mixture that is applied onto a film.