CST

The The fibers are positioned in a loose tube made of high modulus plastic and filled with gel. Tubes (and fillers) are stranded around the non-metallic strength member to form the cable core. Then the core is filled with water-blocking compound and covered with a PE inner jacket. After the corrugated steel tape(CST) is longitudinally armored over the inner jacket, the cable is completed with a PE outer jacket.
 
● Good mechanical and thermal performance
● FRP as the central strength member
● Hydrolysis resistant loose tube
● Tube filling gel ensures critical protection of fiber
● Stranded compact structure eliminating contraction of tubes
● Rugged, durable PE jacket protects against UV radiation, fungus etc.
● Crush resistance and flexibility
● Water-blocking measures :
- Loose tube gel-filled
- 100% cable filling compound
- Corrugated steel tape (CST) enhancing moisture-proof

Fibers are housed in a loose tube that is made of high-modulus plastic and filled with tube filling compound. The water blocking tape is applied around the central tube. Then the tubes are armored with a corrugated steel tape (CST) logitudinally. Two parallel steel wires are embeded in the outer PE jacket.