Inflatable Load Test Bags Fast Inflation Deflation Reusable Corrosion Resistant

Crane Load Test Water Bags are engineered flexible load testing solutions designed specifically for offshore, shipyard, and heavy lifting verification applications where traditional solid test weights are impractical or unsafe. These systems allow controlled simulation of proof loads for cranes, davits, winches, lifting beams, and hoisting structures while significantly improving operational efficiency and safety.

Hongruntong Marine water load bags are manufactured using high-tenacity polyester woven reinforcement fabrics coated with advanced marine-grade PVC elastomer layers. This composite structure delivers excellent tensile strength, puncture resistance, abrasion durability, and long-term structural stability. Reinforced lifting webbings are structurally integrated to ensure uniform load distribution and reduce localized stress concentrations during lifting operations.

Each bag is equipped with high-capacity filling and discharge valves, pressure relief safety devices, and optional load monitoring accessories that enable gradual filling for precise weight control. Available capacities typically range from 1 ton to over 100 tons per unit, while modular configurations allow higher combined test loads for large offshore cranes and floating lifting systems.

Their lightweight foldable design minimizes transportation complexity and storage space requirements, making them particularly suitable for offshore deployment, shipyard commissioning projects, floating crane inspections, and remote industrial sites where logistics efficiency and operational safety are critical.

An offshore engineering contractor operating a floating production storage vessel required periodic certification of deck cranes used for maintenance lifting operations. Transporting traditional steel test weights offshore was logistically difficult and involved high vessel charter costs. Weather conditions and limited deck space further complicated previous testing attempts.

Hongruntong Marine supplied high-capacity crane load test water bags designed for offshore use. The bags were transported in compact folded form and filled directly with seawater once positioned beneath the crane hook. The controlled filling process allowed engineers to gradually apply the required proof load while monitoring crane performance and structural response.

The testing operation was completed safely without the need for heavy transport vessels or complex rigging arrangements. Crane downtime was minimized, operational risks were reduced, and the contractor reported significant cost savings compared with previous testing methods. The successful implementation demonstrated the practicality of flexible water load testing systems for offshore crane certification programs, and the client has continued using the solution for routine inspections.

• Offshore Oil and Gas Platform Crane Testing: Water load bags are widely used for proof-load testing of platform cranes, maintenance lifting equipment, and offshore hoisting systems where transporting solid weights is impractical.
• Floating Crane and Heavy Lift Vessel Certification: Marine contractors utilize water bags for commissioning and recertification of floating cranes, heavy lift barges, and offshore installation vessels.
• Shipyard Construction and Repair Operations: During shipbuilding or major vessel refits, water load bags provide a flexible and safe solution for crane commissioning and verification.

• Focused Expertise in Offshore Testing Equipment Manufacturing: Hongruntong Marine has extensive experience designing load testing equipment specifically for marine and offshore applications. Our engineering team understands environmental challenges, classification requirements, and operational constraints, allowing us to deliver reliable solutions tailored to demanding offshore conditions.
• Advanced Material Selection and Manufacturing Technology: We use carefully selected high-strength fabrics and marine-grade polymer coatings that provide excellent durability, chemical resistance, and long-term structural stability. Strict manufacturing procedures ensure consistent quality and performance across every production batch.
• Customized Engineering for Complex Projects: Every lifting system has unique testing requirements. We provide customized bag capacities, shapes, connection configurations, filling manifolds, instrumentation integration, and branding options. This flexibility allows optimal adaptation to specific crane geometries and operational environments.
• Comprehensive Technical Support and Long-Term Partnership: Our service extends beyond product delivery. We provide technical consultation, operational guidance, documentation support, and responsive after-sales assistance. This ensures customers achieve maximum operational safety, efficiency, and long-term value from our products.