Extra Line/Double Braid Mooring Line

Product: X21

Diameter: 22mm-100mm

Structure: Double Braid

(Core/Cover): Nylon / Polyester

Standard: ISO 2307

The rope is composed of wear resistant polyester rope cover and super strong nylon rope core. The specific double braid construction design makes it have the best strength. The cover of the rope is made of polyester fiber material with excellent wear resistance, combined with special twisting to give full play to the wear resistance. The rope is round and strong, easy to operate and not easy to wind and knot.

Compared with UHMWPE and polyester ropes, X21 has greater extensibility, fully absorbs the impact force, provides better safety protection for ships.


  • High tenacity polyester cover with a high tenacity nylon core 
  • Good UV resistance 
  • Excellent abrasion resistance 
  • Flexible 
  • Easy to handle

  • General working line
  • Mooring tails 
  • Secondary mooring lines
  • Capstan mooring
  • Soft lines


Specifications are for unspliced strengths, strength will decrease by about 10% after splicing.

Custom size and length available by request.

Mooring lines

Mooring lines include primary mooring lines and mooring tails.The primary mooring line which requires high strength and light weight is used to fix the vessel on the shore; The mooring tails that connect the primary line and the mooring bollard should have good elasticity and wear resistance, provide the extension performance for the mooring system, and minimize the impact load caused by wind or waves.

The primary mooring lines and mooring tail can be connected with each other through shackles, splicing or cow hitch, which is convenient for releasing, mooring and replacing mooring tails, and prolongs the service life of the whole mooring system. The best way to improve the stability and efficiency of the mooring system is to select the most suitable mooring line according to the needs.

Absorption of impact force

Nylon is a common material used in mooring lines because of its ability to absorb impact forces. When a vessel is subjected to strong winds or waves, it can cause significant tension in the mooring lines, resulting in sudden and strong impacts on the vessel and the mooring system.  Nylon mooring line designed to absorb these impact forces by stretching, which helps to reduce the load on the vessel and the mooring system.

The main advantages of nylon mooring lines in absorbing impact forces include their high strength, excellent elasticity, and ability to distribute loads evenly across the line. This helps to reduce the risk of damage to the vessel and the mooring system, and also helps to extend the lifespan of the mooring lines.

Abrasion protection

The service life and safety of ropes are closely related to the wear protection of ropes.

Abrasion is one of the biggest culprits of line damage. Wear can be divided into two types: internal wear caused by relative movement of internal and external yarns; And external wear caused by contact with external surfaces, such as friction on rollers and chocks.

When the rope without any protection moving over a rough surface, it's easy to see when the external strands are abraded by a rough surface. The external friction will also cause the relative movement between the external fiber and the internal fiber, which will aggravate the wear. The external friction is limited to the protective sleeve through wear protection, which also greatly reduces or eliminates the internal wear of fibers.


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