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
Labels:

Comments

Post a Comment

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
14 comments
Read more

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
9 comments
Read more

Pump Shaft Alignment Procedure

Types of shaft alignment methods: Visual Line-Up Straightedge/Feeler Gauge Rim and Face Cross Dial Reverse Dial Laser Visual Line-Up The visual line-up method is the most common method of alignment. Used in initial installations, visual line-up allows technicians to analyze the working conditions and feasibility of installation. Straightedge/Feeler Gauge Straightedges are used to determine the offset between coupling halves. Corrections are made under all four of the machines feet. Feeler gauges or taper gauges measure the gap between coupling halves at the bottom and top of the coupling. Rim and Face This method is similar in principle to using a straightedge and feeler gauge, but more accurate since dial indicators are used. The rim reading measures the offset between the coupling halves. The face reading measures the angular difference between the faces of the coupling. Changes are calculated with the same formula as the straightedge/feeler gauge met
2 comments
Read more