21 8 2014 FLEXWELL district heating cable FHK Subject to technical changes System description 1 General FLEXWELL district heating cable is the registered name of a flexible pipe system from BRUGG Pipe Systems used to transport district heat and domestic hot water This pipe which is laid directly in the ground has proven its merits in practice for many years under a wide range of extreme conditions FLEXWELL district heating cable has a helically corrugated inner pipe made of stainless steel The materials used are extremely resistant to corrosion making this product ideal for trans porting a wide variety of media such as heating water domestic hot water drinking water condensate and others The corrugation of the inner pipe not only ensures the flexibility of the whole pipe but also compensates intrinsically for the temperature induced change in length There is no need for precautions to accommodate expansion U bends L limbs or fixed points of the sort required with rigid pipe systems Thanks to its corrugated outer steel case FLEXWELL district heating cable belongs to the steel casing pipe family The continuous multi layer anti corrosion protection on the outside ensures unparalleled security and reliability in the ground during operation FLEX W E L L district heating cable is a reliable solution especially when the ground is not very stable and subsidence is possible and in very wet ground high groundwater levels This prod uct can be laid through water siphon method with no problems Thanks to this product s continuous anti corrosion protection the pipe trenches for FLEXWELL district heating cable can be substantially narrower than for rigid pipe systems This in turn allows considerable savings on underground construction work Because of its flexibility and the high loading capacity of its casing FLEXWELL district heating cable is particularly suitable for the horizontal directional drilling HDD method This method is used wherever valuable surfaces require protection or difficult crossings would otherwise have to be constructed Taking account of the very short time required for installation FLEXWELL district heating cable offers a solution for district heat transport that is not only technically perfect but also very cost effective with minimal disruption for district heat customers and the general public during the construction period 5 100 2 Range of applications Max permitted operating temp T Bmax 170 to 150 C Max permitted operating pressure p PN 25 bar

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