15t Parachute Type Underwater Lifting Bag Durable Material Long Service Life 

15t Parachute Type Underwater Lifting Bag Durable Material Long Service Life

Description

The Parachute Type Underwater Air Lift Bags from Hongruntong Marine are precision-engineered solutions for lifting, refloating, and stabilizing heavy offshore structures. Designed to operate under challenging marine environments, these underwater air lift bags combine high tensile strength, corrosion resistance, and precise buoyancy control to deliver exceptional performance in subsea engineering, offshore construction, and salvage operations.

Constructed from high-tensile nylon fabric with dual-layer PVC coating, these bags withstand abrasion, puncture, and chemical exposure, making them ideal for long-term use in seawater and oil-contaminated environments. Reinforced seams, stainless steel fittings, and integrated multi-point lifting straps ensure uniform load distribution, minimizing stress concentrations and risk of failure.

The parachute-shaped design offers vertical stability during inflation, reducing oscillation and drift, even when lifting long pipelines, subsea modules, or irregularly shaped components. Over-pressure relief valves and one-way check valves provide safe and controllable inflation, while compatibility with standard diving air systems and offshore compressors allows versatile deployment in various operational scenarios.

With buoyancy capacities ranging from 1 ton to 50 tons, these lift bags can be used individually or in series, providing scalable solutions for projects of all sizes. Foldable, lightweight, and reusable, they enable rapid deployment and retrieval, significantly improving operational efficiency while maintaining strict safety standards.

Case Study — Offshore Pipeline Installation, UAE

In 2023, Hongruntong Marine collaborated with a leading offshore contractor in Abu Dhabi to facilitate the installation of a 1.2 km subsea oil pipeline. The project presented multiple challenges: uneven seabed topography, strong currents, and the need to lift long, heavy pipe sections with precision.

Twelve 10-ton parachute type underwater lifting bags were deployed along the pipeline at strategic intervals. Divers attached each bag using reinforced stainless steel shackles and pre-marked lifting points. The multi-valve inflation system allowed fine-tuned adjustment of each bag’s buoyancy in real-time, compensating for seabed irregularities and hydrodynamic forces.

The parachute-shaped lift bags maintained vertical alignment, minimizing swinging and torsional forces during ascent. The high-tensile, PVC-coated nylon fabric resisted abrasion from rocks and sediments, while over-pressure relief valves prevented sudden upward surges. This combination ensured safe, controlled lifting throughout the operation.

Within 48 hours, the pipeline section was successfully lifted, positioned, and secured to its designated seabed location. Compared to previous projects using conventional lift bags, Hongruntong’s solution increased operational efficiency by 25%, reduced diver fatigue, and minimized safety risks. The project demonstrated the reliability, precision, and versatility of Hongruntong Marine’s underwater air lift bags in offshore engineering applications.

Specifications

Features

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 Marine has built a reputation for excellence in delivering a wide range of services. Our expertise encompasses ship agency, ship management, crewing, chartering, and logistics solutions. We work closely with ship owners, operators, and charterers to ensure smooth and seamless operations.

At Hongruntong Marine, we are committed to providing exceptional service at every stage. Our team of highly skilled professionals is dedicated to delivering personalized solutions tailored to meet the unique requirements of each client. We understand the dynamic nature of the maritime industry and continuously adapt to the latest industry trends and regulations.

Safety is our top priority. We adhere to strict safety standards and procedures to ensure the well-being of our crew, vessels, and cargo. Our commitment to safety is evident in our track record of incident-free operations and our compliance with international maritime regulations.

As a customer-centric company, we prioritize building strong and long-lasting relationships with our clients. We believe in open communication, transparency, and integrity. Our aim is to exceed our clients' expectations and to be their trusted partner in the maritime industry.

Hongruntong Marine's success is driven by our unwavering dedication to service excellence, professionalism, and innovation. We are continuously investing in our people, technology, and infrastructure to maintain our position as a leader in the industry.

When you choose Hongruntong Marine, you can expect reliable, efficient, and cost-effective solutions that meet your specific needs. We look forward to serving you and contributing to the success of your maritime operations.