PRE-INSULATED TWIN PIPES SERIES 3
| Production Nominal Diameter | DN | Inch | Steel Pipe Out. Dia. d1 (mm) | Steel Pipe Out. Dia. d2 (mm) | Wall Thickness (t) mm | Distance Between Two Steel Pipes (Lp) mm | HDPE Casing Pipe Out. Dia. D (mm) | HDPE Casing Pipe Wall Thickness (s) mm | HDPE Casing Pipe Inner Dia. (mm) | PUR Thickness (mm) | Pipe Size L (mt) |
| DN 15-15/160 | 15 | 1/2″ | 21.3 | 21.3 | 2 | 19 | 160 | 3 | 154 | 66.35 | 6 |
| DN 20-20/160 | 20 | 3/4″ | 26.9 | 26.9 | 2 | 19 | 160 | 3 | 154 | 63.55 | 6 |
| DN 25-25/180 | 25 | 1″ | 33.7 | 33.7 | 2.3 | 19 | 125 | 3 | 119 | 42.65 | 6 |
| DN 32-32/200 | 32 | 1 1/4″ | 42.4 | 42.4 | 2.6 | 19 | 200 | 3.2 | 193.6 | 75.6 | 6 |
| DN 40-40/200 | 40 | 1 1/2″ | 48.3 | 48.3 | 2.6 | 19 | 200 | 3.2 | 193.6 | 72.65 | 6 |
| DN 50-50/250 | 50 | 2″ | 60.3 | 60.3 | 2.9 | 20 | 250 | 3.6 | 242.8 | 91.25 | 6 |
| DN 65-65/280 | 65 | 2 1/2″ | 76.1 | 76.1 | 2.9 | 20 | 280 | 3.9 | 272.2 | 98.05 | 6 |
| DN 80-80/315 | 80 | 3″ | 88.9 | 88.9 | 3.2 | 25 | 315 | 3.9 | 307.2 | 109.15 | 6-12 |
| DN 100-100/400 | 100 | 4″ | 114.3 | 114.3 | 3.6 | 30 | 400 | 5.8 | 388.4 | 137.05 | 6-12 |
| DN 125-125/500 | 125 | 5″ | 139.7 | 139.7 | 3.6 | 30 | 500 | 5.6 | 439.6 | 174.55 | 6-12 |
| DN 150-150/560 | 150 | 6″ | 168.3 | 168.3 | 4 | 40 | 560 | 7.2 | 548 | 176.95 | 6-12 |
| DN 200-200/710 | 200 | 8″ | 219.1 | 219.1 | 4.5 | 45 | 710 | 7.2 | 695.6 | 238.25 | 6-12 |
| DN 250-250/900 | 250 | 10″ | 273 | 273 | 5 | 45 | 900 | 8.7 | 882.6 | 304.8 | 6-12 |
