8 1 2015 BRG PREMANT district heating pipe PRE Subject to technical changes 6 500 PE outer pipe D mm 90 110 125 140 160 180 200 225 250 280 315 355 400 450 500 560 630 670 710 800 Gap A m 0 23 0 23 0 23 0 28 0 28 0 28 0 28 0 28 0 28 0 28 0 38 0 38 0 38 0 48 0 48 0 48 0 48 0 58 0 58 0 58 Width B m 0 9 0 9 0 9 1 2 1 2 1 2 1 2 1 2 1 4 1 4 1 8 1 8 1 8 2 4 2 4 2 6 2 6 3 1 3 1 3 1 B DD AA m in 0 1 0 0 40 0 10 A Underground construction work installation Pipe installation It is essential to ensure that the outer PE casing is not damaged Before welding the PE sleeve pipes must each be pushed over one side of the pipe ends Then they must be pulled back over the connection points to protect the insulation The detection wires must always be on top when installing the pipes Make sure that sufficient space is available to apply the supplementary insulation on the sleeves at least 15 or 20 cm below and between the sleeves Underground work The general construction regulations must be observed when excavating the pipe trenches Please ask us for an installation suggestion in case of difficult soil conditions or subsidence etc The pipe trench must be kept clear of water throughout the installation period PREMANT district heating pipes must be installed on foam pipe supports sand bags each at a distance of approx 1 m from the weld points After installation the pipe must be filled in on all sides following the trench profile with friable round edged sand particle size 0 8 mm Fill the pipe to 30 cm below the upper edge of the terrain with excavation material and compact Install the pipe warning tape finish filling in the trench and compact Trench profile according to DIN 4124 EWELCON electro welding joints Every joint requires a top hole sheet PRE 6 501 In the pipe zone clearance of at least 23 cm is required sheet PRE 6 501 Trench dimensions Polystyrene pipe support or sand bags Pipe warning tape Sand washed Particle size 0 8 mm Figures in m m in 0 6 0

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