Germany – Installation of pipe system – FW-Verbindungsleitung Vorwerk - St. Lorenz, Lübeck (TWB)

The project aims to expand and optimize the energy infrastructure by connecting two existing district heating networks via a approximately 3.2-kilometer long transport pipeline between Schwartauer Allee (Vorwerk) and Ziegelstraße (St. Lorenz) in Lübeck. Along the route, some sections already exist as existing pipelines. The three planned construction sections close the remaining gaps and thus complete the overall connection. In total, approximately 2.5 kilometers of new pipelines will be laid to create a continuous and efficient heat transport route. Technically, predominantly pipe dimensions DN 400 (with 630 mm outer diameter per pipe) and in the area of Ziegelstraße DN 200 (DN 350) are used, adapted to the existing infrastructure and traffic conditions. 1. BA [Schwartauer Allee (Nord)], DN400, 750m: 10/2026 - 06/2028 2. BA (Schwartauer Allee), DN400, 950m: 10/2026 - 08/2028 3. BA (Ziegelstraße), DN200, 780m: 03/2027 - 11/2028 The construction work includes, in particular, civil engineering, pipeline and qualified welding work according to the applicable district heating regulations. A prerequisite for the execution is the submission of an independent certification by an accredited organization, such as according to AGFW FW 601 (FW1,st), to ensure a professional and quality-assured implementation.