InArmor CST
Corrugated Steel Tape (CST)
Overview
InArmor CST is a cost-effective and one of the most popular designs. It is a multi-tube cable with corrugated steel tape as an anti-rodent armoring. Apart from an excellent rodent resistance, this cable is also UV-resistant, so it features multi-purpose outdoor installation: from direct buried to duct and aerial lashed. Even though it has a reduced weight and size, it provides increased tightness due to application of water-swellable tape.
Typically, this cable consists of a stranded core with a central strength member (FRP) and dry loose tubes with optical fibers. The stranded core is fixed by water-swellable yarns. A water-swellable tape is laid over loose tubes. An armor of corrugated steel tape is laid over the water-swellable tape.
InArmor CST’s maximum rated design tension can reach up to 607 lb but it may be produced with even higher MRDT up to 1.124 lb. It has a wide range of operating temperatures from -40°F to +158°F and installation temperatures from -22°F to +158°F (operating temperature range can be increased on request).
Submarine
Installation down
2500 - 5000 m
Suitable for harsh
environments
Fiber Color Coding
Features
| Maximum rated design tension (MRDT) | 607 lb (2.7 kN) | ||
| Crush | 126 lb/in (0.22 kN/cm) | ||
| Fiber count, up to | 72 (6×12) | 96 (8×12) | 144 (12×12) |
| Cable diameter, in | 0.476 | 0.539 | 0.681 |
| Cable weight, lb/ft | 0.088 | 0.109 | 0.162 |
| Minimum bending radius, in | 7.2 | 8.1 | 10.2 |
Operating parameters
| Operating temperature | -40°F … +158°F |
| Installation temperature | -22°F … +158°F |
| Transportation and storage temperature | -58°F … +158°F |
| Minimum bending radius | 15 x cable diameter |
| Design life | 25 years |
