Pipes are suitable for district heating networks characterised by low and high parameter dimensions. Maximum working temperature for TWIN PIPE system amounts to 140°C and the  maximum difference in temperature between feeder pipe and return pipe amounts to 60°C . Maximum pressure: 2,5 MPa.

The system is suitable for underground heating networks in which feeder pipes and return pipes are integrated in the same casing pipe made of high density polyethylene PEHD pipe. As a result costs of assembling the pipe network and heat loss are reduced (we can observe 20% - 30% heat loss reduction as compared to conventional preinsulated pipeline systems, depending on their size).

The system comprises a complete set of elements for service steel pipes available in dimensions ranging from DN 20 to DN 200 for.