In the dynamic and rapidly expanding marine industry, the integration of cranes on boats has emerged as a pivotal innovation, transforming the way cargo is handled, construction projects are executed, and various marine operations are conducted. China, with its robust manufacturing sector and significant maritime activities, has become a hub for the production and utilization of these versatile machines.

This in-depth guide delves into the world of cranes on boats in China, exploring the myriad applications, benefits, and challenges associated with these critical pieces of equipment. Readers will gain insights into how these cranes enhance productivity, efficiency, and safety in marine operations, from loading and unloading heavy cargo to supporting offshore wind energy projects and naval applications.

You can expect to learn about the key advantages of using boat-mounted cranes, including their versatility, cost-effectiveness, and the ability to access remote locations. The guide will also address the potential drawbacks, such as the impact on boat stability, the need for specialized training, and the significant maintenance requirements.

Small Boat Crane Manufacturer in China

Since the provided websites do not include the specific content from the URL https://ouco-industry.com/small-boat-crane/, I will create a comprehensive guide based on the general information about small boat cranes, using the details from the other sources.

Guide to Small Boat Cranes

Introduction

Small boat cranes, also known as davit cranes, are essential for marine applications, particularly for lifting and handling small boats, tenders, jet skis, and other personal watercraft. These cranes are designed to be efficient, durable, and easy to use.

Types of Small Boat Cranes

Manual and Electric Winch Versions

Small boat cranes can come in both manual and electric winch versions. The manual version often includes an electric drill adaptor to ease heavier lifts, while the electric version provides more convenience and less physical effort[1].

Materials and Construction

These cranes are typically made from advanced composite materials such as pultruded fiberglass, which is corrosion-resistant and lightweight, making them ideal for marine environments. They can be about 40% lighter than steel counterparts[1].

Key Features

Lifting Capacity

Small boat cranes usually have a lifting capacity ranging from a few hundred kilograms to several thousand pounds. For example, a common capacity is around 1,200 lbs (approximately 540 kg)[1].

Boom and Mast

The boom and mast of these cranes are often adjustable, with features like a four-position boom and 360-degree rotation on a sleeve bearing. This flexibility allows for precise placement and handling of the load[1].

Installation and Operation

These cranes are designed for easy installation and operation. They often require no tools for installation and include features like a ratchet screw jack to adjust the boom under load, providing an infinite range of lift[1].

Components and Accessories

Pedestal Base

A sturdy pedestal base is typically included to provide stability and support for the crane. This base is crucial for ensuring the crane’s stability during operation[1].

Synthetic Rope and Hook

The crane kit usually includes synthetic rope and a hook, which are essential for lifting and securing the load. The synthetic rope is durable and resistant to marine environments[1].

Applications

Marine Installations

Small boat cranes are ideal for various marine installations, including:
– Boat houses
– Beach clubs
– Larger vessels
They can handle a variety of watercraft such as:
– Small sailing craft
– Jet skis
– Canoes and kayaks
– Tenders
– Ribs
– Personal watercraft (PWCs)[1].

Maintenance and Durability

Corrosion Resistance

The use of materials like pultruded fiberglass ensures that the crane is corrosion-free, making it highly durable in marine environments[1].

Regular Maintenance

Regular maintenance is crucial to ensure the longevity and efficiency of the crane. This includes checking the synthetic rope, lubricating moving parts, and ensuring the pedestal base is securely fastened.

Safety Considerations

Load Capacity

Always ensure that the load does not exceed the crane’s lifting capacity to avoid accidents and damage to the crane[1].

Operation

Follow the manufacturer’s instructions for operation, and ensure that the crane is properly secured before lifting any load.

Inspection

Regularly inspect the crane for any signs of wear or damage, and perform necessary repairs promptly.

Conclusion

Small boat cranes are versatile and essential tools for marine applications, offering a combination of ease of use, durability, and efficiency. By understanding their features, applications, and maintenance requirements, users can ensure safe and effective operation of these cranes.

Rescue Boat Crane – New Marine

Guide to Lifeboat Cranes and Davits from New Marine

Introduction

Lifeboat cranes and davits are critical components in maritime safety, designed to handle the launch and recovery of lifeboats, rescue boats, and life rafts. New Marine offers a range of these devices, each with specific features and capabilities.

Types of Lifeboat Cranes

General Purpose Lifeboat Cranes

These cranes are primarily used to move cargo, containers, and other materials while the vessel is in a harbor or sheltered area. They are typically mounted on surface-type vessels.

Specifications of New Marine Lifeboat Cranes

Models and Capacities

New Marine provides several models of lifeboat cranes, each with different specifications:

Model	Max Hoisting Load	Slewing Radius	Max Slewing Angle	Hoisting Speed	Slewing Speed	Type/Power of Electric Motor
NMC0215F	2T	3.5-15M	≤330	≥15M/MIN	0.25R/MIN	Y160L-4-H/15KW
NMC0316F	3T	3.6-16M	≤330	≥15M/MIN	0.5R/MIN	Y180L-4-H/22KW
NMC0416F	4T	3-16M	≤330	≥15M/MIN	0.5R/MIN	Y180L-4-H/22KW
NMC0512F	5T	2.7-12M	≤330	≥10M/MIN	0.25R/MIN	Y180L-4-H/22KW

Key Features

• Max Hoisting Load: The maximum weight the crane can lift.
• Slewing Radius: The range within which the crane can rotate.
• Max Slewing Angle: The maximum angle the crane can rotate, which is up to 330 degrees for all models.
• Hoisting Speed: The speed at which the crane can lift loads, ranging from 10 to 15 meters per minute.
• Slewing Speed: The speed at which the crane can rotate, measured in revolutions per minute.
• Type/Power of Electric Motor: The type and power of the electric motor used to operate the crane.

Operational Use

Hoisting and Slewing

These cranes are designed for efficient hoisting and slewing operations. The hoisting speed ensures quick and safe lifting of loads, while the slewing speed allows for precise rotation to position the load accurately.

Power and Control

The cranes are equipped with electric motors of varying power ratings, ensuring reliable and controlled operations. The motors are designed to handle the specified loads and speeds.

Safety and Compliance

Regulatory Compliance

All lifeboat cranes and davits from New Marine are designed and manufactured in accordance with international maritime regulations, including IMO/SOLAS and LSA codes. This ensures that the equipment meets the highest safety standards.

Maintenance and Installation

Installation

The cranes are designed to be mounted on surface-type vessels. The installation process must be carried out according to the manufacturer’s guidelines to ensure proper functioning and safety.

Maintenance

Regular maintenance is crucial to ensure the longevity and reliability of the lifeboat cranes. This includes checking the electrical motors, hoisting and slewing mechanisms, and performing routine inspections as recommended by the manufacturer.

Conclusion

Lifeboat cranes from New Marine are robust, reliable, and designed to meet the stringent safety requirements of the maritime industry. By understanding the specifications, features, and operational guidelines of these cranes, users can ensure safe and efficient launch and recovery operations for lifeboats and rescue boats.

50m Self-Propelled Floating Crane Barge 2019 built China

Since the provided URL is not accessible, I will create an outline and an in-depth guide based on the general characteristics and specifications of a 50m self-propelled floating crane barge, using information from similar sources.

Outline

• Introduction
• General Specifications
• Dimensions
• Propulsion and Performance
• Crane Specifications
• Operational Capabilities
• Lifting Capacity
• Outreach and Radius
• Transshipment and Cargo Handling
• Accommodation and Crew
• Safety and Classification
• Additional Features and Equipment
• Conclusion

In-Depth Guide

Introduction

A 50m self-propelled floating crane barge is a versatile and powerful vessel designed for various marine operations, including cargo transshipment, construction, and maintenance tasks. These barges are equipped with advanced crane systems and robust propulsion, making them essential assets in maritime industries.

General Specifications

Dimensions

• Length: Typically around 50 meters (164 feet)
• Beam: Approximately 15-23 meters (49-75 feet)
• Draft: Usually between 2-3.5 meters (6.6-11.5 feet)
• Depth: Around 2.5-3 meters (8.2-9.8 feet)[2][3][4].

Propulsion and Performance

• Main Engines: Often equipped with diesel engines, such as those from Guangzhou Diesel or EM MOTORS GMBH, providing a total power output of around 600-1200 horsepower.
• Speed: Average speed of about 7-10 knots, with some models capable of reaching up to 12 knots[2][3][4].
• Thrusters: May include azimuth thrusters or bow thrusters for enhanced maneuverability.

Crane Specifications

• Lifting Capacity: Typically ranges from 200 to 350 tons, depending on the crane model and configuration[2][3][4].
• Boom Length: Main hook boom lengths can vary but often reach up to 40-50 meters.
• Auxiliary Hooks: Some models come with multiple auxiliary hooks for additional lifting capabilities.

Operational Capabilities

Lifting Capacity

• The crane on a 50m self-propelled floating crane barge can lift heavy loads, with capacities such as 200 tons at a radius of 26.5 meters or 135 tons at a radius of 47 meters[4].
• The lifting capacity can vary significantly based on the boom angle and outreach.

Outreach and Radius

• The crane’s outreach can extend up to 50 meters or more, allowing for flexible and precise lifting operations.
• The working radius is typically around 32-40 meters, depending on the crane’s configuration[2].

Transshipment and Cargo Handling

• These barges are designed for efficient cargo transshipment between ships and shore, capable of handling 2500-3500 tons per hour[1].
• They are also suited for grab dredging, placing rocks, blocks, or tetrapods, and other heavy-duty marine construction tasks[3].

Accommodation and Crew

• Accommodation: Can accommodate a crew of 5-12 people, depending on the barge’s design and purpose.
• Facilities: Basic living quarters, galley, and sanitary facilities are typically provided for the crew[4].

Safety and Classification

• Classification: Often classified by reputable maritime societies such as China ZC, CCS, or BV Coastal area.
• Safety Features: Equipped with necessary safety equipment, including life-saving appliances, fire-fighting systems, and navigation aids.

Additional Features and Equipment

• Mooring and Anchoring: Fitted with mooring winches and anchor winches to ensure stable positioning.
• Auxiliary Equipment: May include oil recovery equipment, grabs, and other specialized tools for specific tasks[4].
• Power Generation: Independent diesel-electric sets or harbor generators for power redundancy.

Conclusion

A 50m self-propelled floating crane barge is a highly versatile and powerful tool in the maritime industry. With its robust crane system, efficient propulsion, and versatile operational capabilities, it is ideal for a wide range of tasks from cargo transshipment to marine construction. Understanding its specifications and capabilities is crucial for selecting the right vessel for your operational needs.

A boat mounted-crane infilling Victoria Harbour in Hong …

Guide to Land Reclamation in Victoria Harbour, Hong Kong

Introduction

Land reclamation is a significant engineering process that involves creating new land from bodies of water, often to meet the demands of urban expansion. In the context of Victoria Harbour in Hong Kong, land reclamation has been a crucial strategy for increasing the city’s land area.

The Role of Boat-Mounted Cranes

Overview

Boat-mounted cranes play a pivotal role in the land reclamation process in Victoria Harbour. These cranes are installed on barges or boats, allowing for the precise placement of materials in the water.

Functionality

• Material Placement: Boat-mounted cranes are used to deposit fill materials such as soil, sand, and rocks into the harbour. This process is essential for gradually building up the seabed to create new land.
• Precision and Flexibility: The mobility of these cranes enables them to reach various areas of the harbour, ensuring that the fill materials are distributed evenly and according to the planned design.
• Efficiency: The use of boat-mounted cranes streamlines the reclamation process, allowing for faster and more efficient work compared to traditional land-based methods.

Land Reclamation Process

Planning and Design

• Before the physical work begins, extensive planning and design phases are undertaken. This includes geological surveys, environmental impact assessments, and detailed engineering designs to ensure the stability and feasibility of the new land.

Site Preparation

• The area designated for reclamation is marked and prepared. This may involve removing any existing obstacles or structures.
• Geotextiles or other stabilizing materials may be laid down to provide a stable base for the fill materials.

Filling and Compaction

• Boat-mounted cranes and other heavy machinery are used to transport and deposit fill materials into the designated area.
• The deposited materials are then compacted using specialized equipment to ensure stability and prevent settling.

Monitoring and Maintenance

• Continuous monitoring is conducted to ensure that the reclamation process is proceeding as planned and that the new land is stable.
• Maintenance work may include additional compaction, drainage installation, and other measures to prepare the land for future use.

Environmental and Social Considerations

Environmental Impact

• Land reclamation can have significant environmental impacts, including changes to water currents, loss of marine habitats, and increased pollution.
• Measures such as environmental impact assessments and mitigation strategies are implemented to minimize these effects.

Social Implications

• The creation of new land can lead to urban development, housing, and economic opportunities, but it can also displace existing communities and alter local ecosystems.
• Public consultations and social impact assessments are crucial to address these concerns and ensure that the benefits of land reclamation are shared equitably.

Conclusion

Land reclamation in Victoria Harbour, facilitated by boat-mounted cranes, is a complex and multifaceted process. It involves meticulous planning, advanced engineering techniques, and careful consideration of environmental and social impacts. This process has been instrumental in expanding Hong Kong’s land area, supporting its rapid urbanization and economic growth.

Boat Deck Small Lifting Crane With Fixed Boom Electical …

Guide to Boat Deck Small Lifting Cranes with Fixed Boom

Overview

Boat deck small lifting cranes with fixed boom are designed to provide robust and reliable lifting solutions in demanding marine environments. These cranes are tailored for various marine applications, including handling hoses, cargo, and other equipment on vessels.

Design and Construction

Robust and Solid Design

These cranes feature a robust and solid design with components selected for durability in marine environments. The construction is compliant with the requirements of classification societies, ensuring they can operate worldwide.

Materials and Durability

The cranes are built to withstand harsh marine conditions, with a focus on durability and longevity. They are designed to operate in ambient temperatures ranging from +45°C to the lowest ambient working environment.

Technical Specifications

Lifting Capacity and Outreach

• The standard range covers capacities from 3 tons to 25 tons.
• The outreach can be up to 24 meters, making them versatile for various lifting tasks.

Power and Electrical System

• The cranes are driven by an explosion-proof electric motor.
• The power source is typically AC 415V, 50Hz, 3-phase.
• The motor power is 45KW, with a motor speed of 1475 r/min.
• The electric starter is located in a safe area, and EExde start/stop buttons are mounted on the crane.

Protection and Safety

• The cranes have a protection class of IP56, ensuring they are resistant to dust and water ingress.
• They are designed for handling in hazardous areas, with safety features such as explosion-proof motors and safe start/stop mechanisms.

Operational Features

Control and Operation

• The cranes are equipped with a dedicated hydraulic power pack and a water-resistant handheld wired control.
• The control system allows for precise and intuitive operation, ensuring safe and efficient lifting.

Working Temperature

• These cranes can operate in temperatures ranging from -10°C to +45°C, with optional lower temperature packages available for operation down to -40°C.

Additional Features and Options

Certification and Compliance

• The cranes can be certified for personal lifting and are compliant with various regulatory requirements.
• They can be designed to meet ATEX Zone 1 and 2 execution standards.

Optional Equipment

• Wireless remote control
• Operator cabin with AC and heating
• ATEX package and certification
• Man-riding winch
• Centralized grease system
• Multiple settings of load limiting system
• Automatic overload protection system
• Warning and working lights
• Load indicator system

Maintenance and Service

Easy Maintenance

• The cranes are designed with simple hydraulic systems and main equipment located in easily accessible positions.
• Sheaves can be replaced easily due to separable bearing housing, reducing maintenance time.

Fast and Efficient Operation

• The cranes feature fast lowering speeds, maintained at the highest speed for any load, ensuring quick and efficient operations.

Installation and Transport

Installation Space

• The cranes are designed to fit within specific installation spaces, typically around 3000x1600mm, and can be mounted or welded to the vessel’s main structure.

Transport Packaging

• Electric parts are packed in high-quality plywood crates to prevent distortion during transport.
• Main beams, end beams, and electric hoists are packed in plastic woven cloth to reduce abrasion.

Conclusion

Boat deck small lifting cranes with fixed boom are highly versatile and reliable tools for various marine lifting tasks. With their robust design, durable construction, and comprehensive range of features and options, these cranes ensure safe, efficient, and reliable operations in demanding marine environments.

171m Floating Crane Barge 2023 China 3000mt SWL

Since the specific website you mentioned is not accessible in the provided search results, I will create a comprehensive guide based on the information available from similar sources, such as the specifications and characteristics of large crane barges.

Guide to 171M Floating Crane Barges

Overview

A 171M floating crane barge is a specialized vessel designed for heavy lifting operations in various maritime and offshore environments. Here is an in-depth look at its key features and capabilities.

General Characteristics

Dimensions

• Length: 171 meters (561 feet)
• Breadth: Typically around 32 meters (105 feet)
• Depth: Usually around 12 meters (39 feet)
• Draft: Approximately 7.86 meters (25.8 feet)[1].

Tonnage and Capacity

• Gross Tonnage (GT): Varies, but for large crane barges, it can be substantial.
• Net Tonnage (NT): Also varies, dependent on the specific design and cargo capacity.
• Lifting Capacity: Can range from 50 tons to several hundred tons, depending on the crane model and configuration. For example, some large crane barges have a lifting capacity of up to 350 tons or more[2][3].

Crane Specifications

Lifting Capabilities

• Maximum Lifting Capacity: Typically around 50 tons for smaller models, but can be as high as 350 tons or more for larger cranes.
• Maximum Lifting Height: Can extend to heights of over 100 meters (330 feet) above the waterline.
• Maximum Working Radius: Varies, but can be up to 157 feet (48 meters) or more from the center of the crane[2][3].

Crane Operations

• Hook Configurations: Often includes multiple hooks for different lifting tasks, such as main hooks for heavy loads and smaller auxiliary hooks for finer adjustments.
• Dynamic Braking: Some cranes are equipped with dynamic braking systems to safely lower loads in case of mechanical brake failure[2].

Propulsion and Maneuverability

Self-Propulsion

• Self-Propelled or Not: Some crane barges are self-propelled, while others are not. Self-propelled barges offer greater maneuverability and independence.
• Propulsion Systems: Can include advanced systems like Voith-Schneider propellers or azimuthal thrusters for enhanced maneuverability and stability[2][3].

Speed and Performance

• Speed: Self-propelled crane barges can achieve speeds of around 5-6.7 knots (9-12 km/h), with cruising speeds typically around 5 knots (9 km/h).
• Maneuverability: Designed for excellent maneuverability, especially in confined or crowded work areas[2][3].

Operational Considerations

Stability and Safety

• Transverse Stability: Critical for safe operation, especially in open ocean or strong wind conditions. The righting arm and roll period are key factors to consider[2].
• Restricted Operating Areas: Some crane barges are restricted to sheltered waters due to stability concerns, such as the Long Beach Naval Shipyard or the Panama Canal[2][3].

Crew and Operations

• Crew: Typically requires a crew of several officers and men to operate the crane and manage the barge.
• Maintenance and Support: Regular maintenance is crucial for the crane and barge systems to ensure safe and efficient operations.

Certifications and Documentation

Class and Certifications

• Class: Often classified by organizations like ABS (American Bureau of Shipping).
• Certificates: May include certificates of inspection, registry, and ownership, as well as general arrangement plans and equipment lists[1].

Applications

Heavy Lifting Operations

• Offshore Construction: Used for installing large modules and equipment in offshore projects.
• Shipyard Operations: Commonly used in naval shipyards for heavy lifting tasks such as ship repairs and construction.
• Lock Maintenance: Can be used in canal systems for maintenance and repair of locks and other infrastructure[3].

Other Uses

• Emergency Response: Can be deployed for salvage operations or emergency repairs.
• Infrastructure Projects: Used in the construction and maintenance of bridges, docks, and other maritime infrastructure.

This guide provides a comprehensive overview of the key features, capabilities, and operational considerations of a 171M floating crane barge, highlighting its importance in various heavy lifting and maritime construction tasks.

China Boat Crane Factory & Suppliers

Since the provided websites do not include the specific content from https://www.hyportalcrane.com/boat-crane/, I will create a comprehensive guide based on the general characteristics and features of portal cranes, particularly those used in maritime and shipyard environments, using the information from the other sources.

Guide to Portal Cranes for Maritime and Shipyard Applications

Introduction

Portal cranes are versatile and powerful lifting solutions widely used in shipyards, ports, and other maritime environments. They are designed to handle a variety of tasks, including cargo loading and unloading, ship repair, and construction.

Main Features of Portal Cranes

Capacity and Outreach

• Portal cranes can have a load capacity ranging from 5 to 550 tons, with some models capable of handling multiple hooks[1].
• The outreach of these cranes can vary from 15 to 120 meters, depending on the model and application[1].

Lifting Height and Rail Gauge

• The lifting height of portal cranes can be up to 120 meters above the rail and 50 meters below the rail[1].
• The rail gauge can be customized but typically ranges from 6 to 12 meters[1].

Mechanisms and Operations

• These cranes often feature wire rope or rack luffing, and some models come with double boom configurations[1].
• They are equipped with mechanisms for lifting, rotating, and luffing, which work together to complete various tasks[1].

Applications of Portal Cranes

Ship Repair and Construction

• Portal cranes are extensively used in shipyards for ship repair and construction. They facilitate the installation of equipment and the handling of large components[1][2].

Cargo Handling

• These cranes are ideal for cargo loading and unloading operations in ports and wharfs. They offer precise positioning of cargo and the ability to transfer cargo horizontally[2].

Material Handling

• Portal cranes are also used in material storage yards for handling bulk cargoes, containers, and other materials[2].

Design and Construction

Portal Base and Traveling Mechanism

• The portal base is the load-bearing part of the crane, and it is mounted on a traveling mechanism that allows the crane to move along a track set on the ground[1].

Rotating Part and Boom

• The rotating part of the crane is equipped with a boom and mechanisms for lifting, rotating, and luffing. This setup enables the crane to perform a wide range of tasks[1].

Key Benefits

Precision and Productivity

• Portal cranes offer precise positioning of cargo due to minimal swinging, which enhances operational efficiency[2].

Customization and Flexibility

• These cranes can be customized to meet specific requirements, including different load capacities, outreach, and rail gauges[1].

Safety Features

• Many portal cranes come with safety features such as anti-tipping mechanisms to prevent accidents during typhoons and hydraulic clamps to prevent sliding[1].

Cost Efficiency

• Portal cranes are known for their lightweight body, low purchase cost, and low power consumption, which reduce operating costs[1].

Technical Specifications

Load Capacity and Lifting Height

Load Capacity (ton)	Lifting Height above/below Rail (m)	Gauge (m)
5	15~25	8.0~12
10	15~25	8.0~12
15	15~25	8.0~12
20	20~35	9.0~12
…	…	…
Customizable	Customizable	Customizable

Maintenance and Support

Technical Support

• Reputable manufacturers often provide technical support, customized design services, and project budgeting assistance to ensure the optimal performance of the crane[1].

Regular Maintenance

• Regular maintenance is crucial to extend the lifespan of the crane and ensure continuous operation. This includes checking the hydraulic systems, wire ropes, and other critical components.

Conclusion

Portal cranes are essential tools in maritime and shipyard environments, offering a combination of high load capacity, precise cargo positioning, and flexibility in operation. Their customizable design and robust construction make them suitable for a wide range of applications, from ship repair and construction to cargo handling and material storage. By understanding the features, applications, and benefits of portal cranes, users can make informed decisions to enhance their operational efficiency and safety.

Marine Crane

Since the provided websites do not include the specific content from https://www.weitongmarine.com/collections/marine-crane, I will create a comprehensive guide based on the general information about marine cranes gathered from the other sources.

Marine Cranes: A Comprehensive Guide

Introduction

Marine cranes are essential components of modern vessels, facilitating various cargo handling and offshore operations. This guide will delve into the different types of marine cranes, their functionalities, key features, and applications.

Types of Marine Cranes

Gantry Cranes

• Function: Primarily used in ports for loading and unloading containers from ships.
• Cost Range: $350K – $7M
• Pros: High efficiency, capable of handling large container volumes.
• Cons: Expensive, requires significant space and infrastructure, limited to container handling[5].

Jib Cranes

• Function: Used for general cargo handling, capable of rotating 360 degrees.
• Cost Range: $210K – $1.4M
• Pros: Versatile, ideal for various cargo types, compact design suitable for smaller vessels.
• Cons: Limited lifting capacity compared to larger cranes, potential for slower operation[5].

Luffing Cranes

• Function: Allows high-precision lifting by raising or lowering the jib.
• Cost Range: $560K – $4.9M
• Pros: High precision, essential for heavy-lift ships, adaptable for different cargo types.
• Cons: High cost, complex operation, requires skilled operators[5].

Pedestal Cranes

• Function: Mounted on a pedestal base, used for general cargo handling on various ships.
• Cost Range: $140K – $700K
• Pros: Stable, versatile, and suitable for multiple ship types.
• Cons: Limited mobility, fixed position on deck[5].

Knuckle Boom Cranes

• Function: Valued for their compact design and versatility, ideal for operations in confined spaces.
• Cost Range: $350K – $2.1M
• Pros: Flexible, suitable for a wide range of lifting tasks, popular for various maritime applications.
• Cons: Requires careful installation to ensure smooth operation of the folding mechanism[5].

Grab Cranes

• Function: Equipped with a grab for handling bulk materials like coal, ore, and grain.
• Cost Range: $350K – $2.8M
• Pros: Efficient for bulk material handling, durable design for tough operations.
• Cons: Limited to bulk materials, less versatile for other cargo types[5].

Subsea Cranes

• Function: Designed for underwater operations, often used in offshore oil and gas industries.
• Cost Range: $10.5M – $28M
• Pros: Critical for subsea operations, high precision and reliability.
• Cons: Extremely expensive, requires specialized crew and maintenance[5].

Platform Cranes

• Function: Used on offshore platforms for handling materials and equipment.
• Cost Range: $1.4M – $4.2M
• Pros: Essential for offshore platforms, durable for harsh environments.
• Cons: High cost, limited to specific uses[5].

Lattice Boom Cranes

• Function: Provides stable, heavy lifting, typically used in construction or salvage operations.
• Cost Range: $700K – $4.9M
• Pros: Stable, high lifting capacity, suitable for large ships.
• Cons: Large footprint, not suitable for all ship types[5].

Portal Cranes

• Function: Used in shipyards and ports for shipbuilding, repair, and cargo handling.
• Cost Range: $700K – $2.8M
• Pros: Versatile, can be used for shipbuilding and cargo operations, moves on rails.
• Cons: Requires significant infrastructure, limited mobility[5].

Key Features of Marine Cranes

Boom Types

• Fixed Boom: Standard high tensile steel construction with boom angle or load radius indicator[1].
• Telescopic Boom: Extends to increase reach, available in single, double, and triple telescopic configurations[1][3].
• Knuckle Boom: Folding boom ideal for confined spaces, offers flexibility in lifting tasks[3][5].
• Telescopic Knuckle Boom: Combines the features of telescopic and knuckle booms for enhanced versatility[3].

Swing Rotation

• 360-Degree Rotation: Continuous rotation in both directions with limit stops, standard swing speed 0.5 to 2 RPM[1].

Hydraulic System

• Cylinders: Hydraulic cylinders with honed steel tube construction, internally ported load hold valve for safety[1].
• Power Pack: Can be installed inside the foundation column for efficient operation[3].

Controls and Safety Features

• Control Systems: Standard low-pressure joystick controls, optional remote control via cable or radio[3].
• Safety Systems: Includes load cells, encoders, and transmitters with redundancy, type-approved by major class societies like DNV GL[2][3].
• Personnel Handling: Optional personnel handling features with winch, boom, and 110% rated brake for safe man-riding operations[1].

Materials and Construction

• Corrosion-Resistant Materials: Cylinder piston rods, pins, and high-pressure pipes made from corrosion-resistant materials like stainless steel[3].
• Painting and Coating: Surfaces painted with an equivalent International or Marine paint system, including zinc rich primer, epoxy mid coat, and polyurethane cover coat[1].

Testing and Assembly

• Factory Assembly and Testing: Cranes are factory-assembled and tested to ensure quality and performance[1].

Applications of Marine Cranes

Cargo Handling

• Bulk Carriers: Cranes like the K4 crane and GLB/GLBE crane are used for bulk handling on bulk carriers and multi-purpose ships[2].
• Container Ships: LC/LCS cranes and GL/GLE cranes are used for cargo handling on container ships and general cargo ships[2].

Offshore Operations

• Offshore Platforms: Platform cranes and lattice boom cranes are used for heavy lifting and material handling on offshore platforms[3][5].
• Subsea Operations: Subsea cranes are critical for underwater operations in the offshore oil and gas industries[5].

Ship Types

• General Cargo Ships: Cranes like the GLH/GLHE crane are used for handling heavy and multi-purpose cargoes[2].
• Tankers: HH cranes are used for hose handling on tankers, ensuring safe and reliable operations[2].

Conclusion

Marine cranes are indispensable for the efficient and safe operation of various maritime activities. Understanding the different types, features, and applications of these cranes is crucial for selecting the right equipment for specific needs. Whether it is cargo handling on bulk carriers or subsea operations in the oil and gas sector, the right marine crane can significantly enhance operational efficiency and safety.

3800t Crane Barge Cheap Sale – Commercial Vessels

Guide to Floating Cranes: Uses, Operations, and Challenges

Introduction

Floating cranes are specialized maritime vessels equipped with cranes, designed to perform a variety of heavy-lifting tasks in aquatic environments. These cranes are crucial in the maritime industry, particularly for cargo handling, offshore construction, and maintenance.

Uses of Floating Cranes

Cargo Handling

One of the most common uses of floating cranes is for loading and unloading cargo from ships. When a ship arrives at a port, floating cranes are used to lift containers and other cargo from the ship and transport them to the dock or another vessel[2].

Offshore Construction and Maintenance

Floating cranes are essential for the construction and maintenance of offshore structures such as oil rigs, wind turbines, and bridges. They can be positioned near the work site, allowing for easy movement around the structure, which is vital in the open sea where conditions can change rapidly[2][3].

General Salvage Work and Repair

Floating cranes are also used for general salvage work, installation, and repair operations. Their versatility makes them ideal for various marine operations, including recovering or placing equipment on the seabed[1][3].

Types of Floating Cranes

Stiff Boom Cranes

Stiff boom cranes are designed to handle general cargo and are known for their ability to lift loads straight up and down with minimal drift. This makes them suitable for handling fragile loads and for operations where precise control is necessary[3].

Telescopic Boom Cranes

Telescopic boom cranes, including knuckle boom cranes, have fewer joints and are easier to maintain but are subject to more wear and tear. They are used primarily for loading and unloading materials and are often found on large-decked vessels and fixed platforms[3].

Foldable Telescopic Boom Cranes

These cranes require minimal deck space as they can fold into a compact size. They operate with a main boom and an outer boom attached to a knuckle, allowing for flexible movement similar to a human finger[3].

Operations and Maneuverability

Propulsion and Maneuvering

Floating cranes are often equipped with advanced propulsion systems, such as Voith Schneider Propellers (VSP), which enable precise maneuvering and the ability to maintain position without the need for lashing ropes or tugs[1].

Stability and Ballast

To ensure stability during operations, floating cranes use ballast tanks. By pumping water into these compartments, the crane can adjust its center of gravity, enabling it to safely and efficiently lift large objects over water[5].

Training and Safety

Operator Training

Operating a floating crane requires extensive training and experience. Operators must complete a training program that includes both classroom instruction and hands-on training. This training covers safety procedures, crane operation, and maintenance. Operators must also obtain a license and undergo periodic training to maintain their skills and knowledge of the latest safety procedures[2].

Safety Considerations

Safety is paramount in floating crane operations. Operators must constantly monitor weather conditions and be prepared to stop operations if conditions become hazardous. They must also be careful with the weight and balance of the load to avoid exceeding the crane’s weight capacity and to ensure the load’s stability during lifting. Knowledge of emergency protocols is also crucial for safe evacuation and incident reporting[2].

Challenges in Marine Construction

Environmental Factors

Floating cranes face several challenges, including wind, weather, and vessel motion, which can reduce the crane’s load capacity compared to its capacity on land. Operators must be prepared to handle these conditions to ensure safe and efficient operations[3][4].

Stability and Flotation

Maintaining stability during lifting operations is critical. The hull of the crane barge must be in a state of stable equilibrium in both transverse and longitudinal directions to handle external loads safely[4].

Structural Integrity

The design of the barge’s hull and deck is crucial for withstanding the loads lifted by the crane. The deck plating must be adequately thick and reinforced to absorb the loads and ensure structural integrity[4].

Conclusion

Floating cranes are indispensable in the maritime industry, offering versatility and capability in various marine operations. Understanding their uses, types, operational requirements, and the challenges they face is essential for effective and safe deployment. With proper training and adherence to safety protocols, floating cranes can efficiently handle heavy lifting tasks in aquatic environments.

China Marine Crane Manufacturers, Suppliers, Factory

Since the provided websites do not include the specific content from https://www.cnthhi.com/marine-crane/, I will create a comprehensive guide based on the general information about marine cranes gathered from the other sources.

Marine Cranes: A Comprehensive Guide

Introduction

Marine cranes are essential components of modern vessels, facilitating various cargo handling and offshore operations. This guide will delve into the different types of marine cranes, their functionalities, key features, and applications.

Types of Marine Cranes

Gantry Cranes

• Function: Primarily used in ports for loading and unloading containers from ships.
• Cost Range: $350K – $7M
• Pros: High efficiency, capable of handling large container volumes.
• Cons: Expensive, requires significant space and infrastructure, limited to container handling[5].

Jib Cranes

• Function: Used for general cargo handling, capable of rotating 360 degrees.
• Cost Range: $210K – $1.4M
• Pros: Versatile, ideal for various cargo types, compact design suitable for smaller vessels.
• Cons: Limited lifting capacity compared to larger cranes, potential for slower operation[5].

Luffing Cranes

• Function: Allows high-precision lifting by raising or lowering the jib.
• Cost Range: $560K – $4.9M
• Pros: High precision, essential for heavy-lift ships, adaptable for different cargo types.
• Cons: High cost, complex operation, requires skilled operators[5].

Pedestal Cranes

• Function: Mounted on a pedestal base, used for general cargo handling on various ships.
• Cost Range: $140K – $700K
• Pros: Stable, versatile, and suitable for multiple ship types.
• Cons: Limited mobility, fixed position on deck[5].

Knuckle Boom Cranes

• Function: Valued for their compact design and versatility, ideal for operations in confined spaces.
• Cost Range: $350K – $2.1M
• Pros: Flexible, suitable for a wide range of lifting tasks, popular for maritime applications.
• Cons: Installation involves ensuring proper integration of hydraulic systems and smooth operation of the folding mechanism[5].

Grab Cranes

• Function: Equipped with a grab for handling bulk materials like coal, ore, and grain.
• Cost Range: $350K – $2.8M
• Pros: Efficient for bulk material handling, durable design for tough operations.
• Cons: Limited to bulk materials, less versatile for other cargo types[5].

Subsea Cranes

• Function: Designed for underwater operations, often used in offshore oil and gas industries.
• Cost Range: $10.5M – $28M
• Pros: Critical for subsea operations, high precision and reliability.
• Cons: Extremely expensive, requires specialized crew and maintenance[5].

Platform Cranes

• Function: Used on offshore platforms for handling materials and equipment.
• Cost Range: $1.4M – $4.2M
• Pros: Essential for offshore platforms, durable for harsh environments.
• Cons: High cost, limited to specific uses[5].

Lattice Boom Cranes

• Function: Provides stable, heavy lifting, typically used in construction or salvage operations.
• Cost Range: $700K – $4.9M
• Pros: Stable, high lifting capacity, suitable for large ships.
• Cons: Large footprint, not suitable for all ship types[5].

Portal Cranes

• Function: Used in shipyards and ports for shipbuilding, repair, and cargo handling.
• Cost Range: $700K – $2.8M
• Pros: Versatile, can be used for shipbuilding and cargo operations, moves on rails.
• Cons: Requires significant infrastructure, limited mobility[5].

Key Features and Specifications

Swing Rotation

• 360-degree continuous rotation in both directions with required limit stop.
• Standard swing speed 0.5 to 2 RPM, through a planetary reduction gear box.
• Swing drive with failsafe brake option[1].

Cylinders

• Hydraulic cylinders are honed steel tube construction with different conceptual designs.
• Internally ported load hold valve holds cylinders in position if hydraulic pressure is lost[1].

Hinge Pins

• Machined from hardened stainless steel, oversized for load carrying capacity.
• Run in bronze bushings[1].

Boom

• Available in fixed boom, telescopic boom, knuckle-boom, or knuckle-telescopic boom models.
• Fabricated standard high tensile steel construction with boom angle or load radius indicator[1].

Hook Assembly

• Fall block or load block options with customized cheek plate[1].

Pedestal

• One piece tubular construction designed with flange for slew bearing mounting and cutout for maintenance access[1].

Personnel/Man-riding Certification

• Optional crane certification for personnel handling/man-riding as per certifying agency standards.
• Includes personnel handling winch, boom, and 110% rated brake, self-loading of load & clutch on winch for automatic braking option[1].

Type Approval

• Frequently used cylinders are consistently manufactured to the same design and specifications and are Type Approved by ABS certification[1].

Testing & Assembly

• Factory assembled and tested[1].

Hydraulic System

• Options such as Standard open center hydraulic system / Skid mounted hydraulic system[1].

Controls

• Standard low-pressure joystick controls[1].

Painting

• All surfaces painted to an equivalent International or Marine paint system.
• Sand blasted to remove burrs, scales, rust, slag, oil, and dirt before painting.
• Zinc rich primer, epoxy mid coat, and polyurethane cover coat[1].

Material Options

• Cr, Ni-Cr, or stainless luffing/Telescopic cylinder rods.
• Heat treated 17-4 / high strength stainless steel pins.
• Continuous welds throughout the crane[1].

Applications and Customization

Ship Types

• Cranes available for bulk carriers, container vessels, general cargo ships, tankers, and other types of vessels[2][3].

Offshore Operations

• Specially-designed offshore cranes can be delivered with an operator cabin and various functions integrated within the control system, such as active heave-compensation and auto-tensioning[3].

Cargo Handling

• Cranes can be customized to meet customer-specific safe working load requirements, with various slew bearing dimensions and pedestal heights.
• Tailored cranes accommodate operational needs and industry regulations[3].

Safety and Control Systems

• Advanced crane control systems like MacGregor’s CC3000 provide real-time information on active systems, load/speed/outreach, and error/warnings/events.
• Safety systems include load cells, encoders, and transmitters with redundancy[2].

Conclusion

Marine cranes are vital for efficient and safe cargo handling and offshore operations. Understanding the different types, their features, and applications is crucial for selecting the right crane for specific

Frequently Asked Questions (FAQs)

What are the primary uses of boat-mounted cranes in China?

Boat-mounted cranes in China are primarily used for handling and moving various types of cargo, including containers and other materials, especially when the vessel is within a harbor or a sheltered area. These cranes are essential for loading and unloading operations, enhancing the efficiency and safety of cargo handling processes.

What are the typical specifications and capacities of boat-mounted cranes?

Boat-mounted cranes in China come with a range of specifications to cater to different needs. For example, they can have maximum hoisting loads ranging from 2 to 25 tons, depending on the model. The slewing radius can vary from 2.7 to 24 meters, and the slewing angle is typically up to 330 degrees. The hoisting speed can be around 10-15 meters per minute, and the slewing speed is usually around 0.25 to 0.5 revolutions per minute. These cranes are also equipped with robust electric motors, such as those with 15-22 kW power.

How are boat-mounted cranes designed to handle demanding marine environments?

Boat-mounted cranes are designed with a robust and solid structure to withstand the demanding conditions of the marine environment. They are built with components selected for durability and can operate in a wide range of ambient temperatures. Additionally, these cranes can be designed to meet the requirements of classification societies and can be equipped with explosion-proof electric motors for use in hazardous areas, ensuring safe and reliable operation.

What safety features are typically included in boat-mounted cranes?

Boat-mounted cranes often include several safety features to ensure safe operation. These can include explosion-proof electric motors and control systems, especially when the crane is designed for use in hazardous areas. The electric starters are usually located in safe areas, and EExde start/stop buttons are mounted on the crane to prevent accidental starts or stops. These features are crucial for maintaining safety standards and complying with regulatory requirements.

Where can boat-mounted cranes be used, and what types of vessels are they typically mounted on?

Boat-mounted cranes can be used in various maritime settings, including harbors, sheltered areas, and even in some offshore operations. They are typically mounted on surface-type vessels, such as cargo ships, barges, and other types of boats that require cargo handling capabilities. These cranes are versatile and can be adapted for use on different types of vessels to meet specific operational needs.