Double Layer Tubing / GDLT
Double layer screened insulating composite tubing
Features
◎ Co-extruded twin layer
◎ Application up to 24kV
◎ RoHS compliant
Features
◎ Co-extruded twin layer
◎ Application up to 24kV
◎ RoHS compliant
Applications
GDLT, a composite tubing with an inner insulating layer and an outer semiconductive layer, is
designed to restore and reinforce cable structures.
Upon installation, the inner layer provides permanent electrical insulation and mechanical
protection, while the outer layer effectively equalizes the electric field and controls electrical
stress at cable joints.
Typical technical performances
| Test Items | Test Method | Test Requirements |
| Insulation layer | ||
| Tensile strength | ASTM D 2671 | 10MPa min. |
| Ultimate elongation | ASTM D 2671 | 200% min. |
| Volume resistivity | IEC 93 | 1014Ω.cm max. |
| Water absorption | ISO 62 | 0.5% max. |
| Semi conductive layer | ||
| Tensile strength | ASTM D 2671 | 12MPa min. |
| Ultimate elongation | ASTM D 2671 | 200% min. |
| Volume resistivity | ASTM D 2671 | 104Ω.cm max. |
Ordering information
| Color | Standard | Black |
| Standard packaging | In 1.2-meter [4-foot] lengths | |
| Ordering description | Specify product name, size and Color (for example, GDLT 45/17 Black) | |
* Other cutting lengths are available on request.
Dimensions
| Size (mm) | As supplied(mm) | After recovered (mm) | Standard length (m) | |
| D*(Min.) | d*(Max.) | w*(Min.) | ||
|
|
||||
| 35/13 | 35 | 13 | 5.4 | 1.0-1.2m |
| 45/17 |
45 |
17 | 5.4 | 1.0-1.2m |
| 55/21 | 55 | 21 | 5.4 | 1.0-1.2m |
| 65/26 | 65 | 26 | 6.0 | 1.0-1.2m |
| 73/26 | 73 | 26 | 6.0 | 1.0-1.2m |
| 85/30 | 85 | 30 | 6.0 | 1.0-1.2m |
| 95/34 | 95 | 34 | 6.0 | 1.0-1.2m |
| 100/38 | 100 | 38 | 6.0 | 1.0-1.2m |
| 115/34 | 115 | 34 | 6.0 | 1.0-1.2m |
| 120/45 | 120 | 45 | 6.1 | 1.0-1.2m |
D* = Inner diameter as supplied
d* = Inner diameter after fully recovered
w* = Wall thickness after fully recovered
