In order to avoid the pollution of the environment by the steel wire oil used in the maintenance of the steel wire cable, reduce the injury to the crew and the cable workers at the terminal, and ensure the safety of the ship cable operators, replace all ship cables with polymer polyethylene (HMWPE) cables before January 1, 2018 (Including head cable, inverted cable, horizontal cable and tail cable). In order to meet this requirement, a shipping company’s ships also replaced all of the marine ropes.
The polymer polyethylene cable selected by a shipping company is a 12-strand marine cable with a diameter of 48mm, a length of 220m and a crushing force of about 1274kN.
This kind of marine cable has strong tensile force, no water absorption, corrosion resistance, small expansion and contraction, low density, convenient and safe operation, but its wear resistance is worse than that of traditional nylon and polyester multifilament cables, and the price is high. For example, the price of a large polymer polyethylene cable with a diameter of 48mm is generally 3 to 4 times that of a nylon multifilament cable with the same breaking force.
At the same time, the elasticity of the marine cable is comparable to that of iron, that is, it is basically inelastic, but extremely rigid.
A polymer polyethylene cable includes a core made of polymer polyethylene monofilaments, and several main strands made around the core. The main strand is composed of a core and 62 secondary strands around the core, the core is made of polymer polyethylene monofilament, and the secondary strand is made of chemical fiber monofilament. After the main strand is set, it is tightened by the metal monofilament, which further increases its strength and weight, so the core section radius can be greatly reduced (because the core set shares the core section radius requirements), and the camouflage increases the durability of the new sea rope, ensuring coiling or dragging. normal use. At the same time, by arranging the cores, the strength of each strand is increased. Ensure the strength of use, improve durability and service life.
Post time: May-30-2022