Name: High Performance Underwater Air Lifting Bags for Flexible Operation and Cost Effective Marine Salvage
Brand: Hongruntong Marine LLC.
SKU: HM-BAB70
Price: 301.00 USD
Availability: InStock

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Features

Specifications

Color: Black, Yellow, Orange, Or As Request

Material: PVC Coating Fabric

Lifting Capacity: 200kg To 50 Tons

Reinforcement: Nylon Fabric

Application: Structural Load Testing, Proof Load Testing

MOQ: 1

Feature: Durable Construction, Easy Filling And Emptying

Layers: 1-6Ply, Or As Request

Thickness: 0.4mm-2.5mm, Or As Request

Product Name: Boat Air Bags

Highlight:

High Fatigue Resistance Boat Air Bags

Load Distribution Underwater Air Lifting Bags

Pressure Stability Inflatable Buoyancy Bags

Basic Infomation

Place of Origin: China

Brand Name: Hongruntong Marine

Certification: ISO, BV, ABS, DNV, LR, SGS, CCS, RMRS

Model Number: HM-BAB70

Payment & Shipping Terms

Packaging Details: Wooden Pallets, Wooden Box

Delivery Time: 5-7 Work Days

Payment Terms: L/C,T/T,D/A,D/P,Western Union,

Supply Ability: 1040 Pcs Per Month

Gallery

High Performance Underwater Air Lifting Bags for Flexible Operation and Cost Effective Marine Salvage

Product Description

Marine Salvage Lift Bags High Performance Flexible Operation Cost Effective

Product Overview

Cylindrical Underwater Air Lifting Bags are engineered inflatable buoyancy devices developed for marine salvage, vessel recovery, underwater lifting, temporary flotation, structural positioning, and subsea maintenance operations. The product consists of a cylindrical reinforced rubber body that generates upward buoyancy after being inflated with compressed air beneath a submerged load.

Case Study: Temporary Flotation Support for a 68 Tonne Patrol Vessel

A coastal shipyard in Southeast Asia successfully used cylindrical Underwater Air Lifting Bags to provide supplementary buoyancy for a 68 tonne steel patrol vessel during underwater hull repairs following a grounding incident. The system reduced the vessel's effective draft and increased working clearance beneath the hull while maintaining stable trim throughout inspection and repair processes.

Technical Specifications

Product Name	Boat Air Bags
Raw Material	PVC coating fabric
Type	Cylindrical
Size	500kg, 1000kg, 5000kg, 10000kg, etc
Thickness	0.4-1.2mm, or as request
Color	Yellow, Blue, Black, etc
Density	0.33-0.9g/cm³
Safety Factor	7:1
Tolerances	+/- 0.03 on densities, +/- 0.2 mm on thickness, +/- 0 to +3mm on width, +/- 0 to +3mm on length

Model Specifications

Model	Buoyancy (kg)	Buoyancy (lbs)	Diameter (mm)	Length (mm)	Approx. Weight (kg)
HM-ULB01	200	441	500	1,000	5
HM-ULB02	500	1,103	800	1,000	8
HM-ULB03	1,000	2,205	1,000	1,500	11
HM-ULB04	2,000	4,410	1,300	1,500	20
HM-ULB05	4,000	8,820	1,600	2,000	50
HM-ULB06	6,000	13,230	2,000	2,000	66
HM-ULB07	8,000	17,640	2,000	2,600	75
HM-ULB08	10,000	22,050	2,400	2,400	80
HM-ULB09	15,000	33,075	2,600	3,000	110
HM-ULB10	20,000	44,100	3,000	3,000	130
HM-ULB11	30,000	66,150	3,000	4,500	170
HM-ULB12	50,000	110,250	4,000	4,000	220
HM-ULB13	70,000	154,350	4,000	5,700	310
HM-ULB14	100,000	220,500	4,000	8,000	450
HM-ULB15	150,000	330,750	5,000	8,000	660
HM-ULB16	200,000	441,000	5,000	10,000	900

Note: Other sizes can be customized according to the requirements.

Key Features

Controlled Pressure and Geometric Stability: Reinforcement structure maintains dimensional stability during operation for consistent load transfer
Load Capacity Through Reinforced Structural Design: Multilayer construction provides mechanical strength for pressure-loaded marine service
Temperature and Environmental Adaptability: Designed to maintain performance across expected operating temperature ranges and marine conditions
Flexible Installation and Handling Configuration: Deflated transport and positioning enables access to confined marine work areas

Applications

Shipyard Underwater Maintenance: Supplementary flotation for hull inspection, cleaning, and underwater repair
Port Emergency Response: Emergency equipment for grounded or partially submerged vessels
Temporary Flotation for Marine Construction: Support for pontoons, structural frames, and underwater assemblies

Why Choose Hongruntong Marine

30+ Years Marine Manufacturing Experience: Technical expertise in rubber materials, fabric reinforcement, and pressure-loaded structures
Customized Dimensions and Configuration: Project-specific design for optimal installation and performance
Comprehensive Quality Control and Testing: Rigorous inspection procedures for pressure retention and fatigue performance
Technical Service and Global Delivery: Support from initial inquiry through delivery and operational guidance

Frequently Asked Questions

Can Cylindrical Underwater Air Lifting Bags be used for planned maintenance rather than emergency salvage?

Yes. They can provide supplementary buoyancy during underwater inspection, hull maintenance, repair, and temporary draft reduction when the vessel and lifting arrangement are suitable for this method.

What is the purpose of the reinforcement layers inside the cylindrical body?

The reinforcement layers provide tensile strength and control expansion caused by internal air pressure. They help maintain dimensional stability and support pressure retention while the rubber layers provide flexibility and environmental protection.

Can the lifting bags operate in areas with temperature changes?

They can be used within the manufacturer's specified operating temperature range. Storage and operation should avoid conditions that could significantly degrade the rubber, including excessive heat, prolonged direct sunlight, aggressive chemicals, or freezing conditions outside the product specification.

How are bags selected when underwater clearance is very limited?

Diameter is a critical parameter because it determines the approximate inflation height and available displacement volume. A suitable diameter and effective length should be selected together based on the available clearance, required buoyancy, vessel configuration, and lifting procedure.

Can Hongruntong Marine manufacture a customized lifting system for a specific vessel?

Yes. Cylindrical lifting bags can be configured according to vessel dimensions, required buoyancy, installation clearance, lifting sequence, valve requirements, fittings, and handling arrangements. The final configuration should be established from the project's engineering requirements before production.

Tag:

Contact Person :	Mr. William Lau
Tel :	+8618910539783
Fax :	86-10-89461910

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