Skip to main content

Mooring Rope

Mooring rope according to the strength, elasticity, durability and operation to choose the most suitable materials. That large ships use wire ropes, and in the small and medium-sized ships to give priority to the use of synthetic fiber rope. All the mooring line as far as possible to choose the same size and material .Multiple strands mooring rope used to tie ships. Requires the tensile strength, impact resistance, abrasion resistance, flexibility, light.

In the past commonly used steel wire rope, hemp or cotton rope; after the emergence of synthetic fiber, has been mostly used for nylon, polypropylene, polyvinyl alcohol, polyester and manufacture. Synthetic fiber rope in light specific gravity, high strength, impact resistance and good abrasion resistance outside, corrosion resistance, mildew resistance, resistance to insects and other advantages. Chemical fiber cable according to the processing structure is divided into With 3 strands rope, 6 strands rope, 8 strands rope, 12 strands rope, double layer multi ply braided rope . 3 stands rope diameter is 4 ~ 50 mm, 8 stands of general cable diameter is 35 ~ 120 mm. According to the needs of special purpose, it can be incorporated into the metal materials in the cable core.

Nylon rope :

High strength, light weight, soft, high elastic, long-term use is not easy to fatigue. The characteristics of strong wear resistance, chemical resistance, oil chemical reaction does not occur. Have water absorbent, weather resistant ability is poor, too long exposure performance will decline. After the friction is easy to produce electrostatic and adsorption of dust

Polyester rope:

High strength, high temperature resistance and the resistance to climate, suitable for high load continuous friction, Acid resistance, alkali resistance and oil resistance, so used for towing. Water absorption rate is only 0.4%,.

Polypropylene rope:

Soft, low water absorption rate, High oil and chemical corrosion resistance, Not easy to absorb dust, dirt. Friction resistance, not easy to slide in the roller and bollard, in the case of repeated curl, has little influence on the strength. Convenient operation, small elongation, small rebound. Poor heat resistance, temperature: 140 degrees - -30.The polypropylene rope breaking force for nylon rope breaking force 51%-66% is a large ship equipped with cable

Polyethylene rope:

Low temperature resistance, chemical resistance, chemical corrosion resistance,. No absorb water that can floating on the water, keeping the various properties in water, suitable for water application. Poor high temperature resistance .still has enough strength at low temperature, soft and easy to operate

Vigny long rope:

Wear resistant, low temperature resistant, salt and oil resistant. Ultraviolet resistance, aging is not easy. High temperature, burning 230 degrees. Poor elasticity, when high temperature or elongated deformation.. High water absorbent

Dyneema rope

light weight, floating in the water, light 87.5%. the same diameter of the steel wire rope the world's highest strength, 1.5 times higher he steel wire rope of the same diameter. -excellent durability, water resistance, chemical resistance, ultraviolet radiation and temperature is repeated, using the constant quality. operation convenient, fast, safe to use, the operation is a short period of time, such as the military in particular situations, maneuver rapid capability. Super low temperature resistance (liquid helium temperature 269 DEG C, it is still able to maintain useful resistance to impact, toughness and ductility and fracture)Low density, light weight (less dense than water, <1 g/cm3). Water absorption is very low. Physiologically inert (most level can be used in contact with food) with FDA certification. Moderate mechanical strength, rigidity, good creep resistance and excellent machining performance. Superior corrosion resistance, resistance to chemicals


Popular posts from this blog

Difference Between A, B & C-Class Divisions?

IMO Symbol A Class Division  IMO Symbol B Class Division  SOLAS has tables for structural fire protection requirement of bulkheads and decks. The requirements depend on the spaces in question and are different for passenger ships and cargo ships. The Administration has required a test of a prototype bulkhead or deck in accordance with the Fire Test Procedures Code to ensure that it meets the above requirements for integrity and temperature rise. Types of Divisions: "A" Class "B" Class "C" Class "A" Class: "A" class divisions are those divisions formed by bulkheads and decks which comply with the following criteria: They are constructed of steel or equivalent material They are suitably stiffened They are constructed as to be capable of preventing the passage of smoke and flame to the end of the one-hour standard fire test. they are insulated with approved non-combustible materials such that the average tempera

Load Line & Why it is Important

Merchant ships have a marking on their hull know as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo, internationally, the Plimsoll line on a ship is officially referred to as the international load line. Every type of ship has a different level of floating and the Plimsoll line on a ship generally varies from one vessel to another.  All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line. There are two types of Load line markings:- Standard Load Line marking – This is applicable to all types of vessels. Timber Load Line Markings – This is applicable to vessels carrying timber cargo. These marks shall be punched on the surface of the hull making it visible even if the ship side paint fades out. The marks shall again be painted with white or yellow colour on a dark background/black on a light background.  The comp

Bilge Injection Valve

Bilge Injection is a valve that enables the engine room bilges to be pumped out directly overboard in the event of an emergency such as flooding. The valve is normally fitted to the end of a branch connection with the main sea water suction line. This enables large main seawater cooling pumps to be used as a bilge pump in an emergency. Emergencies like fire and flooding involve the use of seawater. If there is a fire, seawater is the biggest resource of water available in the sea. Similarly, if it involves flooding of the engine room, cargo spaces or any other place on the ship for that matter; you would again require pumping the sea water out of the ship. In both these cases, you require pumps.  There are two valves in close proximity namely main injection valve and bilge injection valve. Both of them have their own independent controls. The diameter of the bilge injection valve is kept nearly 66% of the main valve diameter which draws water directly from the sea through the