PRE-INSULATED TWIN PIPES SERIES 2
| 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 15-15/140 | 15 | 1/2″ | 21.3 | 21.3 | 2 | 19 | 140 | 3 | 134 | 45.7 | 6 |
| DN 20-20/140 | 20 | 3/4″ | 26.9 | 26.9 | 2 | 19 | 110 | 3 | 104 | 25.1 | 6 |
| DN 25-25/160 | 25 | 1″ | 33.7 | 33.7 | 2.3 | 19 | 160 | 3 | 154 | 43.3 | 6 |
| DN 32-32/180 | 32 | 1 1/4″ | 42.4 | 42.4 | 2.6 | 19 | 180 | 3 | 174 | 44.6 | 6 |
| DN 40-40/180 | 40 | 1 1/2″ | 48.3 | 48.3 | 2.6 | 19 | 180 | 3 | 174 | 37.8 | 6 |
| DN 50-50/225 | 50 | 2″ | 60.3 | 60.3 | 2.9 | 20 | 225 | 3.4 | 218.2 | 45.3 | 6 |
| DN 65-65/250 | 65 | 2 1/2″ | 76.1 | 76.1 | 2.9 | 20 | 250 | 3.6 | 242.8 | 42.6 | 6 |
| DN 80-80/280 | 80 | 3″ | 88.9 | 88.9 | 3.2 | 25 | 280 | 3.9 | 272.2 | 47.2 | 6-12 |
| DN 100-100/355 | 100 | 4″ | 114.3 | 114.3 | 3.6 | 30 | 355 | 4.3 | 307.4 | 54.6 | 6-12 |
| DN 125-125/450 | 125 | 5″ | 139.7 | 139.7 | 3.6 | 30 | 450 | 5.2 | 439.6 | 80.1 | 6-12 |
| DN 150-150/500 | 150 | 6″ | 168.3 | 168.3 | 4 | 40 | 500 | 5.4 | 484 | 68.4 | 6-12 |
| DN 200-200/630 | 200 | 8″ | 219.1 | 219.1 | 4.5 | 45 | 630 | 6 | 616.8 | 89.3 | 6-12 |
| DN 250-250/800 | 250 | 10″ | 273 | 273 | 5 | 45 | 800 | 7.9 | 784.2 | 119.1 | 6-12 |
