Aluminum tube OPGW: optical fibers are placed loosely in plastic tubes embedded in a hermetically sealed aluminum tube. The aluminum tube is surrounded by single or double layers of metallic wires. Material and structure are uniform with good resistance to corrosion. ZTT OPGW is mainly divided into: central-type stainless steel tube OPGW, stranded-type stainless steel tube OPGW, al-covered stainless steel tube OPGW, aluminum tube OPGW, lightning resistant central stainless steel tube OPGW with compressed wires and OPPC. It could replace traditional static / shield / earth wires on overhead transmission lines and add benefit of containing optical fibers which can be used for telecommunications purposes. Lay direction armour: left (S) or. GL FIBER Supply 8-96 Cores Aluminum PBT Loose Tube OPGW Cable With Factory Price, Support OEM, All the OPGW cables supplied from GL FIBER are complied with IEEE 1138、IEC 60794-4、 IEC 60793、TIA/EIA 598 A standards. The Aluminum tube is surrounded by single or double layers of aluminum clad steel. PBT tube OPGW Construction The core of aluminium clad PBT tube OPGW has structure of stranding pattern,when the multiple optical fiber PBT tubes are into cable, The core of aluminium clad PBT tube OPGW has structure of stranding pattern,when the multiple optical fiber PBT tubes are into cable,a. COMPOSITE CABLE WITH TUBE Application : electrical supply of an instrumentation system. 5 mm² 1 Polyamid tube 1 x 2 mm Generaly screened with an aluminium/polyester tape and drain wire Flame retardant.