The marine mooring system refers to the use of equipment to fix the ship at the wharf or other places to limit its movement. So, how to select the best marine mooring equipment?
Choosing The Mooring Bollard
1. For the selection of mooring bollards, attention shall be paid to the requirements of the specification and size. Because of the different specifications and sizes of the ships, there are certain restrictions on the device.
2. Attention shall be paid to the restrictions on the installation position to avoid problems in the installation.
3. Attention shall be paid to the installation requirements, especially the power restrictions, to ensure that the installation of the device meets the stability requirements and ensures the effect.
4. It is necessary to pay attention to the functional requirements and functional limitations, especially the functional requirements of the cable and the limit of the bearing capacity, to ensure the stability of the device in use.
Choosing The Marine Mooring Chock
1. Corresponding types: Different types of products have different structural shapes. We need to choose the corresponding type chock to be able to use normally because of the appropriate structural shape.
2. Corresponding models: There are different models of the same type of mooring chocks, and there are certain differences in decoupling strands and materials between different models of it. Based on this situation, we need to select the corresponding model of products to be applicable.
3. High precision: Because the application has high requirements on the structure and quality of the mooring chock, it needs products with high precision, which will have better applicability because of the excellent comprehensive quality.
Choosing The Roller Fairlead
1. When selecting, it is necessary to see whether the surface of the device in contact with the cable is smooth. To avoid large abrasion of the cable during use, which may lead to the cable being easily broken and unable to be used for a long time.
2. Observe the steel parts except for the body and pin shaft. Generally speaking, there is no problem with the fairlead roller in the body and pin shaft structure. Therefore, it is suggested that when selecting the device, we should focus on other steel parts, especially paying attention to whether the steel parts other than the body and pin shaft have been galvanized or painted.
Selecting Marine Anchor
1. Bruce claw anchor is one of the most popular anchors among leisure rowers in North America. For most rowers, Bruce or delta is the best balance between price and performance.
2. Plow anchors are suitable for most bow rollers. Fluke anchors are the perfect choice for auxiliary anchors or stern anchors. They perform well in sediment and can be easily stored on most bow rollers.
3. The head anchor of commercial ships mainly adopts rod less anchor, and the tail anchor sometimes adopts rod anchor and dovetail anchor.
4. There are many types of anchor materials, the most popular are low-carbon steel, high-strength steel, stainless steel, and aluminum. Most of the traditional steel anchors we are used to seeing in the market may be low-carbon steel or high-strength steel. When selecting ship anchors, in addition to the factors such as the length and weight of the ship, it is also necessary to carefully select the anchor materials.
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Inflatable life rafts stand as vital components of maritime safety, serving as reliable means of survival during emergencies at sea. As technology and engineering progress, various types of inflatable life rafts have emerged, each tailored to specific needs and scenarios. This article explores the diverse world of inflatable life rafts, examining their types, features, and key considerations for selecting the most suitable option to enhance maritime safety.
Common Types of Inflatable Life Rafts
Throw-Overboard Inflatable Life Rafts
Design: Designed to be thrown into the water by hand.
Activation: Automatically inflates upon immersion or can be manually activated.
Use: Common on smaller vessels with limited deck space.
Davit-Launched Inflatable Life Rafts
Design: Installed on the ship’s deck in a cradle and launched using davit systems.
Activation: Can be launched manually or hydrostatically.
Use: Davit launched inflatable life rafts commonly used on larger vessels where deck space is at a premium or for vessels adhering to specific safety regulations.
Canister-Packed Inflatable Life Rafts
Design: Housed in a rigid canister, secured on the ship’s deck or deckhouse.
Activation: Released and inflated manually or automatically upon immersion.
Use: Versatile and suitable for various vessel types, providing protection from environmental elements during inflation.
Valise-Packed Inflatable Life Rafts
Design: Compact and versatile, comes in a soft valise for easy storage.
Activation: Manually launched and inflated upon immersion.
Use: Lightweight and easily deployable, ideal for vessels with limited storage space.
Reversible Inflatable Life Rafts
Design: Opens at the top, allowing for easy boarding from the water.
Capacity: Allows for a larger number of people, facilitating faster and more efficient evacuation.
Use: Suitable for calm sea conditions and scenarios requiring rapid deployment.
Self-Righting Inflatable Life Rafts
Design: Includes a self-righting mechanism to keep the raft upright in the water.
Stability: Increased stability in rough seas, lowering the risk of capsize.
Use: Ideal for vessels navigating in unpredictable and difficult waters.
Aviation Inflatable Life Rafts
Design: Specifically designed for aircraft emergencies over water, compact and lightweight.
Portability: Easily stowed on aircraft and inflated manually or automatically upon ditching.
Use: Essential for flights over water bodies, ensuring the safety of passengers and crew in aviation emergencies.
Offshore Inflatable Life Rafts
Design: Designed for extended survival at sea, often equipped with additional features for long-term use.
Capacity: Typically larger and capable of sustaining occupants for an extended duration.
Use: Ideal for offshore vessels and long-distance voyages where rescue may take more time.
Coastal Inflatable Life Rafts
Design: Suitable for coastal waters and shorter voyages.
Compact: Generally smaller and more compact than offshore rafts.
Use: Designed for vessels operating in areas with easy access to rescue services.
Inflatable Life Rafts with Canopy
Design: Equipped with a canopy or cover to provide protection from the elements.
Shelter: Enhances survival chances in adverse weather conditions.
Use: Recommended for vessels operating in regions with unpredictable weather.
Key Factors for Choosing a Suitable Inflatable Life Raft
Selecting the right inflatable life raft is a critical decision with a significant impact on maritime safety. Consider the following factors to ensure the chosen life raft is well-suited to the vessel’s specific needs:
Vessel Type and Size:
Consider the vessel’s size, type, and stability to determine the most suitable life raft type.
Occupancy Capacity:
Determine the number of people the life raft must accommodate, considering both passengers and crew.
Operating Environment:
Evaluate typical sea conditions and climate to choose a life raft that can withstand the vessel’s operating environment.
Regulatory Compliance:
Verify that the selected life raft complies with international maritime safety regulations and standards.
Deployment Method:
Evaluate the deployment method that best suits the vessel’s needs and available equipment.
Stowage Space:
Consider the available space for stowing the life raft on the vessel.
Inflation Mechanism:
Examine the inflation mechanism, whether automatic or manual, and its reliability.
Additional Features:
Explore features such as canopies, survival equipment, and signaling devices to enhance the life raft’s functionality.
Maintenance and Inspection:
Consider the maintenance and inspection requirements to ensure the life raft’s proper operation.
Training and Familiarization:
Ascertain that the vessel’s crew is adequately trained in the deployment and use of the chosen life raft.
Conclusion
As inflatable life rafts continue to evolve, the maritime industry benefits from improved safety standards. The selection of the best inflatable life raft requires a thoughtful analysis of vessel specifications, operating conditions, and safety regulations. Embracing technological advancements in inflatable life raft design enhances the chances of survival during emergency situations at sea, contributing to a safer maritime environment for all.
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A magnetic powder brake is a friction brake employing electromagnetic principles to control torque or speed in rotating machinery. This article explores the structure and operation of magnetic powder brakes, their types, applications, maintenance, troubleshooting, and future development trends.
1. Structure of Magnetic Powder Brake:
A standard magnetic powder brake comprises two key components: the input rotor (field rotor) and the output rotor (armature rotor), separated by a small air gap. The driving shaft connects to the input rotor, and the load is attached to the output rotor.
2. Magnetic Powder Filling:
The space between the input and output rotors is filled with a thin magnetic powder suspended in a carrier fluid, often composed of iron or iron-based compounds. This powder facilitates torque transmission.
3. Electromagnetic Coil:
An electromagnetic coil surrounds the input rotor, generating a magnetic field when powered. The current passing through the coil creates a magnetic field in the air space between the two rotors.
4. Magnetic Particle Alignment:
The electromagnetic coil aligns iron particles in the magnetic powder with the field lines, creating bridges across the air gap, connecting the input and output rotors.
5. Torque Control:
Operators can control torque precisely by adjusting the input current to the electromagnetic coil. Increased current strengthens the magnetic field and transmitted torque, while decreased current weakens the magnetic field.
6. Torque Limitation:
Magnetic powder brakes offer the advantage of limiting maximum torque, preventing overloading or sudden torque spikes.
7. Slip and Speed Control:
These brakes can control slip and speed by adjusting the coil current, regulating the speed difference between the input and output rotors.
Types Of Magnetic Powder Brake:
Magnetic powder brakes are categorized into hysteresis and eddy current types, each with distinct operating principles related to ferromagnetic and conductive particles.
Wide Applications Of Magnetic Powder Brake:
Used in printing presses, wire drawing machines, web tension control systems, automotive and aerospace industries, and medical imaging equipment for MRI.
Maintenance And Troubleshooting Of Magnetic Powder Brake:
Maintenance:
Regular inspection for wear and damage.
Cleaning to eliminate dust and debris.
Lubrication with compatible lubricants.
Adjustments using a controller to regulate magnetic field intensity.
Troubleshooting:
Adjusting magnetic field strength.
Inspecting for worn or damaged components.
Reducing the load on the brake.
Development Trends of Magnetic Powder Brake:
Energy from Renewable Resources:
Control speed in wind turbines to optimize energy output and reduce wear.
Robotics:
Used for precise control of joint and limb movement in robotic systems.
Medical Science and Technology:
Provides adjustable resistance or support in medical devices like prosthetics and exoskeletons.
Aerospace:
Developing applications to control aircraft control surfaces, such as flaps and rudders.
Conclusion:
Understanding the structure, operation, and diverse applications of magnetic powder brakes is crucial for their effective utilization. As technological advancements continue, these brakes are expected to play a pivotal role in various industries, contributing to enhanced efficiency and control in rotational machinery.
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The specific installation position, lighting angle and the brightness for the navigation light, all have special requirements. The irregular use or failure of the navigation light will transmit the error signal and caused huge obstacles for the collision prevention.
Masthead light
It is installed above on the mast of a ship or above on the centerline, showing uninterrupted in the 225 degree horizontal arc.
Sidelight
It is installed on the left and right sides of the highest boat deck. The screen of sidelight facing the light surface should be coated with the berlin black. The height of the screen is at least equal to the height of the lamp. The boat which has a length of more than 80 meters, should install red, green sidelight on the bow, stern.
Stern light
The boat stern light should be installed in the middle of the stern. The height of the light should be kept horizontally with the sidelight as possible, but can’t be higher than the height of the sidelight.
Headlight
The marine headlight is placed in the bow of the pusher barge and the height can’t be higher than the headlight.
Red-green flashing light
It is the left red, right green marine flash lighting installed above the sidelight and its flashing frequency is 50 to 70 per minute. The boats with a length of less than 12 meters can also adopt a water torch instead of red and green flashing lights and should keep light bright with clear color.
Anchor light
The marine anchor light is installed on the top of the mast with all-around flashing.
Each provision concerning the navigation light must be observed from sunset to sunrise. The signal lights can also be displayed in the situation that the visibility is poor during the day. At the time of navigation light displaying, the lighting which confuses or weakens the display performance of the signal light, can’t be allowed to display.
The Function Requirements
1. The navigation light should be waterproof and the lamp holder should have a structure that prevents its own loose. It should adopt a two-filament bulb. The control box should be in the cab and the switch of the control box should have an instruction to explain its use. The cable of the navigation light is fastened with the complete lampshade & bulb and the good & reliable ground.
2. The switch should be set on the navigation light control box, used to convert the power supply. Each navigation light should be powered by a separate branch that is placed close to the control box installed in the cab and should adopt the switch and fuse which are installed in the control box for control and protection of each insulation of these branches.
3.The navigation light control box should be powered directly from the main distribution board and emergency distribution board.
4. There should be an automatic indicator that can make an auditory or a visual alarm signal at each navigation light and there should be some measurements which are adopted to prevent the navigation light go out due to the signal light failure. The auditory and visual alarms for the failure of the navigation light control box should be provided.
The article has combed the key requirements and regulations for navigation lights and signal lights, giving an explanation for the various types and functions of the boat navigation light.
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LED explosion-proof lamp adopts the LED light source, widely used in the special flammable and explosive working environments, with the advantages of energy-saving, high light efficiency, strong lampshade and lamp cover, long service life, flexible light distribution, excellent heat dissipation, etc.
How To Select The Appropriate Marine LED Explosion-proof Light
The LED explosion-proof light is widely used in offshore homework. For the selecting of marine explosion-proof lighting, the explosion-proof structure and temperature are important points, which are very professional. Measuring the weight of heat-dissipating is a simple and effective way to select the good boat LED explosion-proof light. An appropriate power LED explosion-proof lamp, the relative weight is generally moderate. An inferior LED explosion-proof light manufacturer is unwilling to cost heat dissipating.
The LED explosion-proof light is mainly based on high-power LED lamp beads and package integrated chips, combined with external structures and applicable places. It is should be cautious to select the LED explosion-proof lighting, especially the power and lighting. The size of the LED lampshade is closely combined. Since the temperature of the LED lamp is high, the high-power lamp naturally requires a larger outer shell to achieve good heat dissipation.
Useful Tips To Maintain LED Explosion-proof Light For Long Service Life
After selecting and purchasing the LED explosion-proof light, the question of how to maintain for long service life always be paid to attention.
1. To regularly check the LED explosion-proof light, check whether the grounding is normal.
2. In order to extend the service life of the LED explosion-proof lamp, do not install the windshield device and the like in a humid environment, which has a large negative effect.
3. Regularly clean and wipe the outside dust with a dry cloth, improving the light efficiency and heat dissipation performance of the lamp and the wet cloth can’t be used. It is best to cut off the power before cleaning.
4. In the moisture environment, if there are puddles in the light, it should be maintained in time, replacing the sealing parts to ensure the protective performance of the shell.
5. If the light source is damaged, it should be turned off in a timely, so as not to cause the electrical component, such as the ballast, to be in an abnormal state due to the light source.
6. On the surface of the explosion-proof, it should be thinly coated with a replacement type anti-rust oil and should pay attention to the seal when close the lid, whether the sealing circle is working.
7. After opening the cover, it should be checked whether the composite surface of the explosion-proof combination is intact, whether the rubber seal is hard or becomes sticky, causing the wire insulation to become green and carbonized, whether the insulation and the electrical component are deformed, if discovering these problems. It should be repaired and replaced in time.
8. Check the transparent parts, whether there is a trace of foreign object impact, the protection network has loosening, corrosion, etc. If so, stop using, timely repairing and replacement.
9. The sea portion of the LED explosion-proof lamp should not be disassembled and opened.
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YSmarines is a professional roller fairlead supplier with excellent quality, the most reliable price and fast delivery guaranteed.
Features
1.Flexible bearing or axle.
2.Smooth surface coated externally with an anti-corrosion protective finish;
3.Anti-seawater material.
4.Customized weldable Pedestal
5.Seawater resistant bronze slide bearing with grease lubrication.
6.Welded structure
NS2585 Warping Roller Fairlead
NS2585 warping roller is the same as the GB/T 10105-88 fairlead. It is cast by the finest quality marine mild carbon steel for added durability. All surfaces in contact with the ropes shall be free from surface roughness or irregularities likely to cause damage to the ropes by abrasion. It has a high breaking load of a tightwire. The compact design, precision machined smooth surface and easily removable shafts ensure the good wear and corrosion resistance of the fairlead. It is used to lead the direction of mooring ropes for marine ships
ISO13767 Shipside Roller Fairlead
The shipside roller is made in accordance with the standard of ISO 13767. The safe working load (SWL) intended for the use of the roller fairlead shall be noted in the towing and mooring plan available onboard for the guidance of the shipmaster as specified in MSC/Circ.1175. There are two types of fairleads as the construction, which include 2-roller type and 3-roller type.
ISO13755 Warping Roller Fairlead
The foundation of the warping roller shall be determined by the manufacturer in accordance with the standard of ISO13755. The roller is made from steel casting having a yield point of not less than 205N/mm2 or steel plates having a yield point of not less than 235 N/mm2 and the Axl is made from weldable steel casting having a yield point of not less than 350N/mm2 or equivalent.
Vertical Guide Sheave
The vertical sheave is a type of mooring fittings to guide the mooring rope vertically on the deck. The fairlead is built to withstand breaking strength of indicated rope at 90-degree sheave wrap on sheaves. It is made of cast steel with hardened rope groove for longer life. There can be one sheave or two sheaves together. It is a removable guide roller with an epoxy primer coating. It is a special sheave for high-performance synthetic ropes.
JIS F 2026 Roller Fairlead
The roller fairlead is manufactured strictly according to the Japanese Standard JIS F 2026-1980. It is also known as universal fairlead with horizontal rollers and vertical rollers. It is made of stainless steel. Its surface is polished and galvanized which has high corrosion-resistance. It is usually located on the deck end or in the bulwark. It can perfectly guide the direction of ropes and protect them.
JIS F 2014 Warping Roller Fairlead
The warping roller is manufactured according to the JIS F 2014 -1987 standard. It is also known as CB58-83 fairlead. It is used as a shipside roller fairlead and is to change the direction of the ropes. All surfaces of the fairlead, including welding, shall be free from any visible flaws or imperfections. The roller diameter is from100mm to 450mm, suitable for rope diameter from 40mm to 80mm.
ISO13776 Pedestal Roller Fairlead
The pedestal fairlead is manufactured in accordance with the ISO 13776 standard. The actual SWL of the fairlead on board shall be determined by considering the under deck reinforcement and shall not be over the SWL indicated in this International Standard. Depending on the rollers on the top, the fairleads shall be classified as two types including the cylindrical pedestal and conical pedestal. Besides those, other options such as square or customized pedestals according to the requirement of clients are available.
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Roller fairlead plays an important role in mooring devices. Here we'll introduce some useful tips of the roller fairlead including installation, maintenance and how to find the best manufacturer & supplier.
Installation Precautions For Roller Fairlead
For the installation of the roller fairlead, what should be paid attention to?
1.Safety
It is necessary to pay attention to safety, although the device is not flammable, the safety environmental requirements should meet.
2. Environment
It is necessary to pay attention to avoiding environmental moisture and ensure that the environment has been in a dry state, avoiding rust in the process of installation.
3. Packaging
In the packaging requirements, it is to ensure excellent functions, extending the service life.
Maintenance Of Roller Fairlead
The roller fairlead is always exposed. If it is not well maintained in use, it will increase the chance of damage in use. The maintenance work is needed. So, how does the maintenance work do? Here are some instructions.
Anti-rust Work
For roller fairlead, made with stainless steel materials, people should apply a certain anti-rust oil on its surface before use, and reduce the rust chance in use through anti-rust oil, to ensure a good appearance.
Checking Work
Each component of roller fairlead is needed to be checked for daily use. For any small problem in the check, it is necessary to be paid attention and solve it, which will reduce the chances of damaging for ensuring the long-term service life.
Preventing Deformation
The deformation will affect the use. If the deformation is serious, it will directly lead to the occurrence of fracture. So in the applications,can prevent it from deforming through the control of the pressure.
Daily maintenance can ensure the normal use of roller fairlead, guaranteeing the good effect.
How To Select The Best Roller Fairlead Manufacturer
To ensure good performance, how to choose the high-quality products from the best roller fairlead manufacturer and what factors should be considered are important?
1. Appearance
The material quality, structure, processing level of a roller fairlead, can be reflected from the appearance.
In terms of the reliability of the roller fairlead, it is very important that there are no defects in the appearance, which will affect the intensity. Because of the roller fairlead in use, it is necessary to withstand the huge external force of the ship and it is necessary to ensure that the structure of the roller fairlead is stable, not damaged by the external force, with high requirements in strength.
A good roller fairlead manufacturer should use high-intensity materials and does a good job in processing and surface treatment, ensuring that there is no strength defect in the surface. Otherwise, even if there is no problem with the material intensity, it will also cause problems in the strength due to the surface defect, which will affect the normal functionality use.
The best manufacturer should adopt excellent quality material with the advanced process, then the color of the appearance will be uniform and bright.
2.Specifications
To select a quality roller fairlead, it is necessary to pay attention to the requirements on the specifications, the requirements on the specifications, which is required to transmit the cable on the specifications, because the cable has differences in size, length. The device that can be stored and used is also different from the specifications.
The best roller fairlead supplier should have different specifications to meet the requirements of the installation.
3. Environmental Restriction
Because of the different environments, there is a certain limit on the material of roller fairlead, especially for the marine equipment and the wear of metal device is very large. The requirements of corrosion resistance for the roller fairlead should be considered.
The supplier should adopt excellent corrosion resistance materials for superb roller fairlead.
4.Price
The price always is an important factor for choosing the best-value manufacturer. The most competitive prices with quality products can be a great advantage.
5.Craftsmanship
An excellent manufacturer & supplier should have advanced craftsmanship and strict quality requirements, which should meet the needs of effect and performance.
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Roller fairlead plays an important role in mooring devices. Here we'll introduce some useful tips of the roller fairlead including installation, maintenance and how to find the best manufacturer & supplier.
Installation Precautions For Roller Fairlead
For the installation of the roller fairlead, what should be paid attention to?
1.Safety
It is necessary to pay attention to safety, although the device is not flammable, the safety environmental requirements should meet.
2. Environment
It is necessary to pay attention to avoiding environmental moisture and ensure that the environment has been in a dry state, avoiding rust in the process of installation.
3. Packaging
In the packaging requirements, it is to ensure excellent functions, extending the service life.
Maintenance Of Roller Fairlead
The roller fairlead is always exposed. If it is not well maintained in use, it will increase the chance of damage in use. The maintenance work is needed. So, how does the maintenance work do? Here are some instructions.
Anti-rust Work
For roller fairlead, made with stainless steel materials, people should apply a certain anti-rust oil on its surface before use, and reduce the rust chance in use through anti-rust oil, to ensure a good appearance.
Checking Work
Each component of roller fairlead is needed to be checked for daily use. For any small problem in the check, it is necessary to be paid attention and solve it, which will reduce the chances of damaging for ensuring the long-term service life.
Preventing Deformation
The deformation will affect the use. If the deformation is serious, it will directly lead to the occurrence of fracture. So in the applications,can prevent it from deforming through the control of the pressure.
Daily maintenance can ensure the normal use of roller fairlead, guaranteeing the good effect.
How To Select The Best Roller Fairlead Manufacturer
To ensure good performance, how to choose the high-quality products from the best roller fairlead manufacturer and what factors should be considered are important?
1. Appearance
The material quality, structure, processing level of a roller fairlead, can be reflected from the appearance.
In terms of the reliability of the roller fairlead, it is very important that there are no defects in the appearance, which will affect the intensity. Because of the roller fairlead in use, it is necessary to withstand the huge external force of the ship and it is necessary to ensure that the structure of the roller fairlead is stable, not damaged by the external force, with high requirements in strength.
A good roller fairlead manufacturer should use high-intensity materials and does a good job in processing and surface treatment, ensuring that there is no strength defect in the surface. Otherwise, even if there is no problem with the material intensity, it will also cause problems in the strength due to the surface defect, which will affect the normal functionality use.
The best manufacturer should adopt excellent quality material with the advanced process, then the color of the appearance will be uniform and bright.
2.Specifications
To select a quality roller fairlead, it is necessary to pay attention to the requirements on the specifications, the requirements on the specifications, which is required to transmit the cable on the specifications, because the cable has differences in size, length. The device that can be stored and used is also different from the specifications.
The best roller fairlead supplier should have different specifications to meet the requirements of the installation.
3. Environmental Restriction
Because of the different environments, there is a certain limit on the material of roller fairlead, especially for the marine equipment and the wear of metal device is very large. The requirements of corrosion resistance for the roller fairlead should be considered.
The supplier should adopt excellent corrosion resistance materials for superb roller fairlead.
4.Price
The price always is an important factor for choosing the best-value manufacturer. The most competitive prices with quality products can be a great advantage.
5.Craftsmanship
An excellent manufacturer & supplier should have advanced craftsmanship and strict quality requirements, which should meet the needs of effect and performance.
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The main aim of installing marine rubber fender is to protect both the vessel and the dock from major failure during the berthing period. External forces, such as abrasion or other natural factors can possibly occur during the berthing process. Therefore, marine rubber fenders are made to solve this problem, and therefore, more money can be saved due to less vessel or dock fixing.
Rubber fenders are designed to absorb the energy that a vessel transfers to a berthing structure, hence the term energy absorption, so that the amount of energy received by the dock is much less compared to when fenders are absent. The force that is bounced back and relieved by the dock through the fender is called reaction force. A good quality marine fender can be determined by measuring the energy absorption and reaction force. A good quality marine fender has a high energy absorption and the low reaction force, hence the reduced impact yielded from the vessel to the dock, as well as the minimized impact bounced back from the dock to vessel.
There are a lot of fender types that can be used on the port, for instance: cylindrical fender, V-type, A-type, M-type, super cell, and super cone fender. Tugboat fenders, however, are installed on tugboats to protect vessels from major failure in the incidence of a crash. In order to achieve the best result, there are several factors that to consider in choosing the right type of marine rubber fender, namely the dimension of berthing vessels, the type of the port, situation around the port and the existence tugboat to guide the vessel while berthing.
1. Vessel dimensions
Vessel dimensions, in terms of type and dead weight tonnage, become significant factors in choosing not only the right fender type, but also the size of the fender. The larger the vessel, the larger the required fenders will be. Usually, fenders which are equipped by frontal frames are chosen as they have large contact area. From the economical perspective, V-type fender can be one of the options. However, to yield the maximum result, super cell and super cone fender are selected. For the ports that are used for the small to medium vessel, the type A, V, M, LMD or cylindrical are chosen to protect the port wall.
2. Type of the port
Another significant factor that can influence in choosing the right type of fender is the type of the port. Based on the location and position of the port, there are several port structures that are usually used including dolphin, monopile, jetty and quay wall. In the dolphin terminal, the terminal consists of poles that are used for vessels to berth. Rubber fender that is usually used in this terminal is super cell fender. However, jetty terminal, which is also known as floating terminal, does not need a really tough construction as it floats. This terminal is used for passenger ships. Unlike other kinds of ports, terminals with quay wall consists of concrete structure which parallels the beach. Large vessels cannot berth on this terminal due to the shallow waters in which the terminals are usually located.
3. Marine environment
The marine environment, such as high and low tides of the seawater, the power of wind which influences the waves, is another factor that needs to be considered in choosing the right fender type and dimension. If there is a big difference between the high and low tides, elongated fenders must be chosen, especially when the port is used by diversely sized vessels. If a small vessel needs to berth during the low tide, it can still berth to this port. Therefore, it is recommended to have the fenders installed in vertical position. On the other hand, when the sea is windy and wavy, the water also gets rough. This causes vessels to bump into the port wall. Elongated V type fender, super cell or super cone fender equipped by frontal frames can be used for this type of port.
4. The availability of guidance during berthing process
The availability of tugboats during berthing process is very important in order to avoid vessels from crashing into the port wall. This is because the speed of the vessel and the berthing angle can be adjusted as the vessel moves closer to the port.
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YSmarines can provide you the customized marine chocks as your drawing, high quality and the most reliable prices guaranteed, the certificates of CCS, DNV, ABS, BV, LR, etc guaranteed.
Applications
Small boats;
Sea-going vessels;
Tugboats;
Barges:
Other ships or boats
Packages
Packaged by wooden pallets;
Packaged by steel pallets;
Packaged within containers directly.
Triangle Type Towing Chock
Features
1.High SWL for mooring and towing purpose both;
2.Wide application scope or usage;
3.Smooth surface treatment for better protection of the rope lines;
4.Customized service supported.
NS2590 Deck Mounted Mooring Chock
Features
1.Without stiffeners;
2.Weldable base for choice;
3.Smooth surface;
4.Widely used for vessels.
NS2589 Bulwark Mounted Mooring Chock
Features
1.Support the customized service;
2.Anti-corrosion protective surface treatment;
3.Simple structure design;
4.Advanced production technics.
JIS F 2030-1978 Single Point Mooring Pipe
Features
1.Paint primed or galvanized surface treatment;
2.Closed mooring chock shape;
3.Class Approved;
4.Strict quality control.
JIS F 2017-1982 Panama Chock
JIS F 2017-1982 Deck Mounted Panama Chock (Type AC)
Material: Cast steel
Weight: 293kg to 395kg
Finishing: the Panama chocks shall be coated externally with an anti-corrosion protective finish.
Installation site: on the deck
JIS F 2017 Bulwark Mounted Panama Chock (Type BC)
Material: Cast steel
Weight: 276kg to 472kg
Finishing: the Panama chocks shall be coated externally with an anti-corrosion protective finish.
Installation site: on the bulwark
JIS F 2007-1976 Mooring Pipe
JIS F 2007-1976 Oval Shape Mooring Pipe (Type A)
Material: cast steel
Standard: JIS F 2007-1976
Size: 150/200/250/300/350/400/450/500
Finishing: one layer of shop primer after sandblasting 2.5
JIS F 2007-1976 Circular Shape Mooring Pipe (Type B)
Material: cast steel
Standard: JIS F 2007-1976
Size: 150/200/250/300
Finishing: one layer of shop primer after sand blasting 2.5
Installation site: on the bulwark
JIS F 2006-1976 Open Chock
JIS F 2006 Cast Steel Open Chock (SC Type)
Material: Cast steel
Weight: 10.7kg to 98kg
Finishing: the open chocks shall be coated externally with an anti-corrosion protective finish.
Installation site: on the deck
JIS F 2006 Cast Iron Open Chock (FC Type)
Material: Cast iron
Weight: 11.5kg to 130kg
Finishing: the open chocks shall be coated externally with an anti-corrosion protective finish.
Installation site: on the deck
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