TPi May 2015

developments products &

Installation of Logstor PlateJoint in Lisbjerg

Increasing the durability and service life of district heating networks

Installation is simpler and faster, conducted as a one-unit procedure, where casing joint and outer casing are welded by means of a computer- controlled process. The quality process is recorded and digitally documented. PlateJoint meets the technical requirements specified in the standard for casing joints for DH pipes. Logstor PlateJoint has been chosen for the Lisbjerg pipeline project, near Aarhus in Denmark. This involves a 10km transmission line with OD 800/1,000mm to connect a new CHP plant to the DH network in Aarhus. The project was initiated in 2014 and will be completed in 2016.

a minor interruption here has huge consequences for many, if not all, consumers of the DH company. The pipes must work without interruption, 24 hours a day, each day of the year. High quality joints in the pre-insulated pipes, while welding and installing casing joints on-site, is essential. Logstor has constantly developed its casing joint systems, aiming to produce a casing joint with the same strength as the pipes it joins. For large dimensions, with casing pipes of 780mm and larger, the company has introduced the next- generation Logstor PlateJoint. The PlateJoint is produced from an extruded HDPE plate, and can therefore be supplied as a plate, which makes handling during transportation and installation easier.

By upgrading the quality of steel pipes that constitute the core of a district heating (DH) pipe system, and further developing weld joints in the form of a Logstor PlateJoint for the largest pipe dimensions, Logstor has taken another step towards increasing the service life in supply networks for DH stations. A service life of 30 years is required by standard, but the expected service life is now 50 years or more. The P235GH steel quality has been tested and documented for use at higher temperatures. During 2015 Logstor will convert to a new standard, supplying pre-insulated pipes with steel pipes in quality P235GH for the entire range of dimensions.

logstor a/s – Denmark logstor@logstor.com www.logstor.com

The transmission pipes are the ‘highways’ of the DH network. Even

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Tube ProducTs InTernaTIonal May 2015

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