21 8 2014 FLEXWELL district heating cable FHK Subject to technical changes 5 525 Installation through protective pipes The following points should be noted when installing FLEXWELL district heating cable FHK through protective pipes 1 In order to ensure that the FHK is guided perfectly as it is drawn in One protective pipe is required for each FHK The protective pipe must be laid straight with no angles Protective pipes must not have any offsets on their joints which could impede or prevent the drawing in procedure or which could cause damage to the outer PE protective casing 2 When the throughpress process is used it is not always possible to introduce two small protective pipes into the ground next to one another in these cases one large protective pipe is pressed in instead It is essential to contact us beforehand in order to agree on a structural solution 3 Sufficient working space must be available at ground level in front of and behind the protective pipe to enable the traction engine to shunt easily with the cable trailer so it can draw the FHK into the protective pipe without any angular deviations from the pipeline axis 4 Bends in the pipe routing must be avoided directly upstream or downstream of the protective pipes If this cannot be ensured the pipe routing must be agreed with us beforehand 5 For protective pipes made of PVC PE or fiber cement the FHK is drawn in without skids For steel and concrete protective pipes skids should be used The inner diameter of the protective pipes should be at least 20 mm larger than the outer diameter of the FHK or the skids FHK 5 530 Figures 1 and 2

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