8 1 2015 BRG PREMANT district heating pipe PRE Subject to technical changes 6 525 DN 20 25 32 40 50 65 80 100 125 150 200 250 D1 mm 125 125 140 140 160 180 200 250 280 315 355 450 H mm 470 470 470 490 500 510 520 560 570 590 630 670 D2 mm 250 250 250 300 300 D2 D2 200 D1 200 D1 200 1 2 3 4 5 6 H D 2 Underground construction for ball valve Shafts with drive over cast cover 1 Cast cover drive over e g Von Roll 2 Cement pipe 3 Ball valve 4 Expansion pad 5 Support plate 6 Sand filling particle size 0 8 mm Figures in mm

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