Double Wall tube consists of an outer semi-conducting
layer (black) and an inner insulating layer (red)
Double Wall tube consists of an outer semi-conducting
layer (black) and an inner insulating layer (red). Both layers are
co-extruded for perfect bonding and performance. One tube
serves as both insulation and screen, replacing two separate
tubes that were used in older systems. The tubings are suitable
for applications up to 36kV and the maximum delivery length
is 1000mm.
SPECIFICATIONS
NO. | Property | Test Method | Typical Value |
Outer semi-conducting layer | |||
1 | Specific Gravity | ASTM D792 1.0 | 1.0 |
2 | Tensile Strength | ASTM D412 | 12 N/mm2 |
3 | Elongation | ASTM D412 | 300% |
4 | Water absorption | ASTM D570 | < 0.5% |
Inner insulating layer | |||
1 | Specific Gravity | ASTM D792 1.0 | 1.0 |
2 | Tensile Strength | ASTM D412 | 15 N/mm2 |
3 | Elongation | ASTM D412 | 350% |
4 | Water absorption | ASTM D570 | < 0.5% |
5 | Volume Resistivity | ASTM D257 | 1 x 1014 Ω - cm |
Finished product | |||
1 | Heat Shock @ 200°C | ASTM D2671 | Passes |
2 | Low Temp. Flexibility @ -20°C | ASTM D2671 | Passes |
3 | Longitudinal Change | ASTM D2671 | Inside 10% |
4 | Wall thickness ratio | ASTM D2671 | > 0.6 |
RANGE & DIMENSIONS
NO. | SIZES | I.D As supplied(mm) | I.D After recovery(mm) | Wall Thickness After recovery(mm) |
1 | DW 35/12 | 35 | 12 | 6.0 |
2 | DW 45/15 | 45 | 15 | 6.00 |
3 | DW 55/18 | 55 | 18 | 6.00 |
4 | DW 65/25 | 65 | 25 | 6.50 |
5 | DW 85/30 | 85 | 30 | 6.50 |
6 | DW 100/38 | 100 | 38 | 6.50 |
7 | DW 120/45 | 120 | 45 | 7.00 |
8 | DW 140/50 | 140 | 50 | 7.00 |
