8 1 2015 BRG PREMANT district heating pipe PRE Subject to technical changes System description 6 105 1 Medium pipe Bars steel pipes with longitudinal or helical seam welds Quality Ø 323 9 mm P235TR1 or P235GH as per EN 10220 EN 10217 1 Ø 323 9 mm P 235 GH as per EN 10220 EN 10217 2 Standard EN 253 Test certificate EN 10204 3 1 Welding bevel Wall thickness 3 2 mm acc to DIN 2559 1 Index 21 and 22 Preformed parts T pieces are flared from longitudinal seam welded steel pipes or made of welded t pieces acc to EN 10253 material is the same as for straight welded pipes Quality P235TR1 or P235GH as per EN 10220 EN 10217 Standard EN 448 Test certificate EN 10204 3 1 Welding bevel Wall thickness 3 2 mm acc to DIN 2559 1 Index 21 and 22 Bends DN 20 DN 200 are made of cold bent seamless or welded steel pipes or with a welding elbow acc to EN 10253 Quality P235TR1 or P235GH as per EN 10220 EN 10217 Standard EN 448 Factory certificate EN 10204 2 2 Acceptance test certificate EN 10204 3 1 Welding bevel Wall thickness 3 2 mm acc to DIN 2559 1 Index 21 and 22 Bends DN 250 DN 1000 are made of welded bends acc to EN 10253 with weld on pipe ends Quality P235GH or P235TR1 TR2 Standard EN 448 Factory certificate EN 10204 2 2 Acceptance test certificate EN 10204 3 1 Welding bevel Wall thickness 3 2 mm acc to DIN 2559 1 Index 21 and 22 Note To ensure the longevity of PREMANT plastic sheathing pipe systems it is important to make sure the heating water is of sufficient quality To prevent magnetite formation iron II III oxide and calcification in particular the requirements of VDI 2035 AGFW FW510 and EN 12953 10 must be met Before commissioning a newly installed heat distribution network without a heat exchanger if possible should be circu lated and suspended solids must be removed by means of a suitable filter system This process should also be repeated after every expansion of the network or every repair

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