Inflatable Salvage Bags Marine Grade Fabric Large Capacity Corrosion Resistant

Hongruntong Marine's Pillow Underwater Lifting Bags represent the pinnacle of engineered buoyancy solutions for heavy salvage and deep-water recovery. Unlike open-bottom parachute bags, our enclosed pillow design features a fully sealed, high-tenacity air chamber constructed from multiple plies of flexible PVC and a grid of synthetic tire-cord fabric.

This material composite, tested to CB/T3837 standards, provides exceptional tensile strength (up to 4800 N/5cm) and puncture resistance, ensuring structural integrity when maneuvering around sharp wreckage or jagged underwater structures.

These bags are designed to deliver predictable, static lift. By retaining air completely, they eliminate the risk of sudden air loss during ascent, providing stability for delicate lifting operations. Available in a vast range of capacities from 250 kg to over 200 tons per single bag, our pillow bags are configured with multiple reinforced lifting points and pressure relief valves calibrated to vent expanding gas at a safe differential.

In Q2 of 2023, the 5,000-ton general cargo vessel M/V Global Trader ran aground on a submerged reef near the Spratly Islands, suffering significant hull breach in its forward compartments. Initial salvage plans utilizing external cranes were deemed unfeasible due to the vessel's precarious position.

The salvage master contracted by the owners opted for a parasitic lift solution using Hongruntong Marine pillow bags. A team of commercial divers configured a matrix of twelve HM-WD14 (100-ton capacity) and four HM-WD09 (15-ton capacity) bags rigged using heavy-duty slings.

Over a 72-hour period, the team successfully re-floated the vessel, allowing it to be towed to Singapore for repairs. The operation was lauded for avoiding the need for hot work underwater, reducing both cost and environmental risk.

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

• Heavy Duty Composite Material Construction: Three-layer laminate with PVC coating and nylon tire cord fabric for superior strength, UV protection, and resistance to hydrolysis and microbial attack.
• Engineered Over Pressure Relief System: Stainless steel valves precision-set to vent excess air during ascent, maintaining structural integrity and lift stability.
• High Strength Multi-Point Rigging System: Integrally reinforced stainless steel D-rings and lifting straps for versatile rigging arrangements and even force distribution.
• Extreme Depth and Temperature Tolerance: Engineered for global operations with materials that maintain flexibility in near-freezing temperatures and resist softening in tropical heat.

• Deep Sea Wreck Salvage: Provides viable lifting solution for vessels sunk beyond conventional crane reach, particularly effective for environmental hazard mitigation.
• Emergency Grounding Response: Rapid deployment under grounded vessel hulls to provide stabilizing lift and relieve stress on hull structure.
• Subsea Construction and Foundation Support: Adjustable buoyancy modules for precise placement of heavy structures with controlled "soft landing" capability.

• Decades of Specialized Engineering Excellence: Established in 1990 with deep knowledge of fluid dynamics, material science, and naval architecture.
• Certified Quality and Compliance: Rigorously tested to international standards with third-party type approval from leading classification societies.
• Full Cycle Customization and Design Support: "Design-to-Delivery" service model with CAD modeling and lift planning support for mission-specific requirements.
• Uncompromising After Sales and Warranty: Comprehensive 36-month warranty with ongoing technical support and global logistics for spare parts.