Name: Durable Corrosion Resistant Low Maintenance Boat Air Bags for Underwater Salvage
Brand: Hongruntong Marine LLC.
SKU: HM-BAB68
Price: 301.00 USD
Availability: InStock

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Features

Specifications

Layers: 1-6Ply, Or As Request

Material: PVC Coating Fabric

Feature: Durable Construction, Easy Filling And Emptying

Thickness: 0.4mm-2.5mm, Or As Request

Lifting Capacity: 200kg To 50 Tons

MOQ: 1

Application: Structural Load Testing, Proof Load Testing

Color: Black, Yellow, Orange, Or As Request

Reinforcement: Nylon Fabric

Product Name: Boat Air Bags

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Basic Infomation

Place of Origin: China

Brand Name: Hongruntong Marine

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

Model Number: HM-BAB68

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: 2140 Pcs Per Month

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Durable Corrosion Resistant Low Maintenance Boat Air Bags for Underwater Salvage

Product Description

Cylindrical Underwater Air Lifting Bags

Engineered pneumatic flotation devices designed for underwater salvage, controlled vessel refloating, submerged equipment recovery, temporary buoyancy, marine construction, and underwater positioning operations.

Product Overview

The cylindrical structure provides a longitudinal lifting body capable of generating buoyancy beneath a defined section of a submerged load. Through controlled inflation with compressed air, the bag increases its submerged volume and displaces water, creating an upward buoyant force that can be regulated according to the requirements of the lifting procedure.

Manufactured from reinforced rubber incorporating high-strength synthetic cord fabric, these lifting bags offer exceptional durability and performance in demanding marine environments.

Case Study: Controlled Recovery of a 145 Tonne Fishing Vessel

A marine salvage company in Northern Europe successfully recovered a 145 tonne steel fishing vessel that had grounded in a shallow tidal harbor. Using multiple cylindrical underwater lifting bags, the recovery team restored sufficient buoyancy while maintaining the vessel's transverse stability during changing tidal conditions.

The staged lifting sequence allowed the recovery contractor to work within a restricted operational window, demonstrating the value of controlled pneumatic buoyancy in challenging marine environments.

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)	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

High Fatigue Resistance: Reinforced composite construction with high-strength synthetic cord fabric for repeated operational loading
Optimized Load Distribution: Cylindrical geometry provides controlled longitudinal distribution of buoyant volume
Pressure Stability: Maintains intended operating geometry with dimensional control under internal pressure
Marine Environmental Adaptability: Outer rubber construction provides protection against seawater, abrasion, and mechanical contact
Wear Resistance: Designed for demanding marine environments with routine mechanical contact

Applications

Shallow Water Vessel Salvage: Grounded vessels in coastal waters where crane access may be restricted
Tidal and Harbor Recovery Operations: Adjustable pneumatic buoyancy for changing tidal conditions
Underwater Structural Handling: Positioning and recovery of marine structures, pontoons, and heavy equipment

Why Choose Hongruntong Marine

30+ Years Manufacturing Experience: Comprehensive understanding of reinforced rubber engineering
Engineering Customization: Tailored solutions for specific vessel recovery requirements
Rigorous Quality Control: From materials to finished product with comprehensive testing
Technical Support: International project coordination and ongoing technical assistance

Frequently Asked Questions

Are cylindrical lifting bags suitable for tidal waters?

Yes, they can be used in suitable tidal recovery operations. However, the lifting plan should account for changes in water level, vessel draft, seabed contact, current, and vessel stability. Inflation should be controlled according to the actual recovery condition.

How does the cylindrical design affect buoyancy distribution?

The elongated body distributes displacement along its effective length, allowing upward force to act over a larger supporting area. When several bags are installed at different locations, the overall buoyancy can be distributed according to the vessel's structural arrangement.

Can the bags be used with seawater and sediment contact?

They are designed for marine environments and can operate in seawater and normal sedimentary conditions. However, sharp rocks, exposed metal, cutting edges, and severe abrasion points should be removed or protected before installation.

What should be checked after each lifting operation?

The external rubber surface, reinforcement exposure, end sections, valves, fittings, connection points, and overall shape should be inspected. Cuts, punctures, abnormal deformation, severe abrasion, or other structural damage should be evaluated before returning to service.

Can the dimensions be customized for restricted underwater clearance?

Yes. Diameter and effective length can be configured according to available installation space and required buoyancy. Valve positions, end fittings, reinforced connection areas, and other components can also be specified according to engineering requirements.

Tag:

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

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