Wire rope is a high-carbon steel hot-rolled wire as the primary material of deep processing products, according to its use can be divided into reuse, drilling, elevator, fishing, offshore facilities, Marine and other types of wire rope. Among them, the Marine wire rope is mainly used in mooring, towing, platform fixing, binding, port loading and unloading and other related operations.

Classification of Marine wire cables

According to the thickness of the steel wire and the difference in the number of oil hemp core, it can be divided into soft wire rope, semi-hard wire rope and hard wire rope.

Soft wire cable:

flexible wire rope (flexible wire rope) : It is made of 6 strands of steel wire sandwiched with 1 strand of oil hemp core, and each strand of steel wire is also sandwiched with a fine oil hemp core.

Semi-rigid wire cable:

Semi-rigid wire rope (semi-flexible wire rope) : It is composed of 6 strands of steel wire sandwiched with 1 strand of oil hemp core.

Hard wire cable:

The hard wire rope is a wire rope made of 6 strands of wire rope rolled and twisted, with a steel wire core sandwiched in the middle, and there is no oil hemp core in the wire rope.

Selection of Marine wire rope

Such as traction cable, cable, cargo line, boat line, etc., usually choose soft wire cable. It is characterized by the most soft, light weight, easy to use, and the smallest strength in the wire rope. The common species are 6×24+7, 6×30+7, etc.

Cargo line, boat line, safety line, towing line or mooring line will generally use semi-hard steel cable. It is characterized by a large number of steel wires and thin, more soft, easy to use. The commonly used types are 6×19+1, 6×37+1, etc.

For big masts and chimneys and other stay, with the winch tow line and mooring line is usually selected hard wire cable. It is characterized by high strength, corrosion resistance, wear resistance and long service life. Commonly used types are 7×7, 6×31+(7×7), etc.

Effect of oil hemp core in Marine wire cable

(a) can reduce the internal friction of the wire rope, that is, when the wire rope is strained by the force, the fiber rope core can play the role of a liner.

(2) It can increase the softness of the wire rope for easy operation and use.

(3) Because the fiber rope core contains oil, it can prevent the internal corrosion of the wire rope.

(4) play a lubricating effect.

(5) The type of wire rope can be determined according to the number of fiber rope cores in the wire rope.



Key points of use and maintenance of Marine steel wire cable

When laying the cable, the fine wire rope should be wrapped around the drum at least 5 times.

A homogeneous stop cable should be used for the use of steel wire cables.

In general, the number of ways to pull up piles (big pull) of steel wire cables should be at least 5.

The inspection and maintenance period of Marine steel wire cable is 3 months, and the main points of inspection are: corrosion status of steel cable, broken wire status, oil core content in the cable. The main points of maintenance are: rust should be removed and oil, broken wire should be inserted or replaced.