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Underwater Lift Bags: Superior Lift Capacity, Abrasion Resistant, Secure Handling
Parachute Type Marine Salvage Airbags for naval and emergency recovery operations are engineered buoyancy systems designed for rapid deployment underwater lifting, defense-related recovery missions, and time-sensitive marine incident response. The system is constructed from high-tensile industrial polyester fabric combined with a reinforced marine-grade PVC elastomer coating, forming a structural composite designed for impact resistance, seawater immersion stability, and cyclic pressure loading under operational stress conditions.
The operating principle is based on compressed air displacement in submerged environments, generating controlled buoyancy for lifting and recovery of underwater objects. The parachute-type open-bottom configuration functions as an automatic hydrostatic pressure compensation system, enabling continuous adjustment of internal air volume during ascent. This ensures stable buoyancy behavior under variable depth conditions without requiring complex external pressure regulation systems.
From an engineering perspective, the system is optimized for rapid operational readiness, structural reliability under dynamic loading, and stability during irregular deployment conditions. Reinforced load paths are embedded within the fabric structure to ensure uniform force distribution during lifting of submerged objects with uncertain weight geometry or damage-induced imbalance. This allows controlled recovery operations in environments where time constraints and operational uncertainty are critical factors.
The system is applied in naval salvage, emergency maritime response, underwater equipment recovery, and disaster-related marine operations. It provides a deployable buoyancy solution for scenarios where conventional lifting infrastructure is unavailable, time-restricted, or operationally impractical.
Case Study: Mediterranean Naval Recovery Operation
A naval engineering unit in the Mediterranean region conducted an emergency recovery operation involving a partially submerged ship that had suffered structural damage following a collision during harbor maneuvering exercises. The vessel settled at an irregular angle at a depth of approximately 15 meters within a restricted naval zone, requiring immediate clearance due to operational security and navigational safety requirements.
The operational environment imposed strict time constraints and limited access for heavy lifting equipment due to ongoing naval activity within the area. Conventional crane-based recovery systems were not available within the required response window. The engineering team implemented a rapid deployment strategy using Parachute Type Marine Salvage Airbags as the primary buoyancy lifting system.
A modular lifting configuration was prepared based on rapid underwater assessment conducted by naval diving units. Multiple airbags were deployed and attached to structurally stable sections of the hull using reinforced rigging assemblies. Deployment procedures were executed under controlled emergency protocols to minimize operational delay.
Sequential inflation was performed using portable compressed air systems delivered from surface support vessels. The open-bottom pressure compensation mechanism ensured stable buoyancy behavior during ascent, preventing sudden lifting shocks that could further damage the compromised hull structure.
The vessel was successfully refloated within the designated emergency response timeframe and transferred to a secure inspection zone for structural evaluation. The operation demonstrated high deployment efficiency, operational adaptability under constrained conditions, and reliable buoyancy control in emergency marine environments. The system was subsequently integrated into the unit's standard emergency recovery equipment inventory.
Technical Specifications
Product Name
Marine Salvage Airbags
Keywords
Boat Lifting Airbag
Material
100% High Performance PVC Coated Polyester Fabric
Physical Property
10,000 N/5cm
Nett Buoyancy
1-200 Tons, or As Request
Dimensions
Diameter 0.5m - 3.5m, Length 3.0m - 28.0m, or As Request
Type
Enclosed, Open Bottom
Shape
Parachute
Inflation Tube
30m, Free of Charge
Technology
High Pressure, Overall Winding, Explosion-proof
Metal Parts
Q355 / SS304 / SS316
Safety Factor
5:1
MOQ
1
Repair Tools
Repair Materials, Glue, Free of Charge
Standard
IMCA D016
Certificate
ABS, BV, KR, LR, GL, NK, RINA, DNV, RMRS
Package
Pallets, Wooden Cases
Service Life
20 Years
Warranty
36 Months
Model Specifications
Model
Lifting Capacity [kg]
Lifting Capacity [lbs]
Dimensions [mm]
Appr. Weight [kg]
HM-P01
200
441
800
5
HM-P02
500
1,103
1,000
8
HM-P03
1,000
2,205
1,300
11
HM-P04
2,000
4,410
1,600
20
HM-P05
4,000
8,820
2,000
50
HM-P06
6,000
13,230
2,300
66
HM-P07
8,000
17,640
2,500
75
HM-P08
10,000
22,050
2,700
80
HM-P09
15,000
33,075
3,100
110
HM-P10
20,000
44,100
3,400
130
HM-P11
30,000
66,150
3,900
170
HM-P12
50,000
110,250
4,600
220
HM-P13
70,000
154,350
5,200
310
HM-P14
100,000
220,500
5,800
450
HM-P15
150,000
330,750
6,600
660
HM-P16
200,000
441,000
7,300
900
Note: Other sizes can be customized according to the requirements.
Key Features
Rapid Deployment Engineering Structure: The system is designed for accelerated operational readiness in emergency marine environments. The structural configuration allows quick assembly and underwater attachment without requiring complex mechanical preparation.
Impact-Resistant Composite Material System: The airbag is constructed using a reinforced polyester base fabric combined with a multilayer PVC elastomer coating engineered for high-impact resistance and protection against mechanical stress.
Stable Buoyancy Behavior Under Unpredictable Load Conditions: The system maintains controlled buoyancy performance even when lifting irregular, partially damaged, or flooded structures with uncertain weight distribution.
Hydrostatic Self-Regulation Mechanism: The open-bottom structure functions as a passive hydrostatic regulation system, allowing automatic pressure equalization during ascent and eliminating the risk of internal overpressure.
Applications
Naval Vessel Recovery Operations: Emergency lifting and refloating of naval support vessels, logistics ships, and auxiliary marine units involved in operational incidents or structural damage scenarios.
Emergency Maritime Incident Response: Deployment in maritime accidents requiring rapid clearance of submerged obstacles, damaged vessels, or critical underwater obstructions affecting navigation safety.
Defense and Security Marine Recovery Missions: Support for underwater recovery operations in defense-related environments where controlled buoyancy and rapid deployment capability are required under restricted operational conditions.
Why Choose Hongruntong Marine
Specialized Emergency Marine Engineering Capability: Engineered buoyancy systems designed for both planned offshore operations and emergency marine recovery scenarios, incorporating operational requirements from real-world salvage environments.
Controlled Manufacturing for Operational Reliability: Production processes executed under standardized engineering control systems ensuring consistent performance under emergency deployment conditions.
Customization for Mission-Specific Requirements: Engineering customization for emergency and naval applications, including rapid deployment configurations and mission-specific buoyancy designs.
Technical Support for Field Deployment: Technical guidance provided for deployment planning, underwater installation procedures, and emergency operation optimization.
Frequently Asked Questions
What is the deployment time for Parachute Type Marine Salvage Airbags in emergency operations?
The system is designed for rapid deployment, with configuration and inflation procedures optimized for emergency response scenarios where operational time is limited.
Can the system operate under damaged or partially flooded vessel conditions?
Yes. The system is designed to handle irregular load conditions, including partially flooded or structurally compromised vessels requiring controlled buoyancy support.
How is stability maintained during emergency lifting operations?
Stability is achieved through distributed buoyancy design and reinforced load paths that minimize oscillation and prevent uncontrolled movement during ascent.
Is the system suitable for naval or defense-related applications?
Yes. The system is applicable to naval recovery operations, defense-related underwater missions, and restricted-zone marine engineering environments.
What ensures reliability in rapid deployment conditions?
The combination of reinforced composite materials, high-frequency welded seams, and hydrostatic pressure regulation ensures structural reliability during emergency deployment scenarios.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
1990
Total Annual:
5,256,780-5,593210
Employee Number:
220~360
Ecer Certification：
Verified Supplier
Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients.
Established in 1990, Hongruntong Ma... Hongruntong Marine is a leading marine company specializing in providing comprehensive services in the maritime industry. With a strong emphasis on quality, safety, and efficiency, we strive to meet the evolving needs of our clients.
Established in 1990, Hongruntong Ma...
