? The new formulation makes the tube transparent.
? The problems such as inferior, scratch, intermediate connecting and knotting existing in the tube can be visually observed from the outside.
? It also has a smooth interior surface, which reduces friction during wire pull.
| Nominal size | ? | 16x1.3 | 20x1.5 | 25x1.6 | 32x1.8 |
| Outside diameter | mm | 16 | 20 | 25 | 32 |
| Tolerance of outer diameter (mm) | Min | 15.75 | 19.75 | 24.75 | 24.95 |
| Max | 15.95 | 19.95 | 31.75 | 31.95 | |
| Wall thickness | mm | 1.3 | 1.5 | 1.6 | 1.8 |
| Wall thickness uniformity | ? | ?-2.06≤△A≤+0.26 | |||
| Tolerance of wall thickness (mm) | Min | 1.2 | 1.4 | 1.55 | 1.7 |
| Max | 1.4 | 1.55 | 1.75 | 1.9 | |
| Exterior | Conduit shall be smooth and free of cracks, ridges or burrs. | ||||
| ?Do not damage the wires during installation. | |||||
| Storage temperature | Not less than -5°C/23°F | ||||
| Installation temperature | Not less than -5°C/23°F | ||||
| Long-term working temp. | ?-5°C/23°F ~ 60°C/140°F | ||||
| Flame retardant performance | Self-extinguishes in less than 30 seconds after ignition | ||||
| Oxygen index ≧32% | |||||
| Insulation performance | No breakdown in AC2000V 50 Hz within 15 minutes. | ||||
| ?Insulation resistance≥100MΩ | |||||
| Compression resistance | Load 1min, ≤25% | ||||
| Unloading 1min, ≤10% | |||||