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. 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. These machines are highly automated and equipped with. GYFTA54 is a kind of outdoor communication optical cable, which consists of a non-metallic central strength member, stranded loose tubes, a laminated aluminum tape armor, a PE inner sheath, a stainless. The OPGW Cable (optical power ground wire), also known as the optical ground wire, is a type of cable or wire that is used in transmission line construction and contains the optical fiber unit for communication.