1. High-Quality Raw Materials Our raw materials are primarily sourced from renowned steel mills such as Jiangsu BOS Hydraulic Technology Co., Ltd., Baosteel, Ansteel, and Changjiang Steel Pipe.
2. Advanced Production Equipment Our manufacturing facilities include cold drawing machines, honing machines, skiving and roller burnishing machines, straightening equipment,polishing machines, heat treatment furnaces, grinding machines, and more.
3. Rich production experience, strict quality control We implement a professional internal quality control system to conduct comprehensive inspections on all products.
Offshore and Marine Corrosion Resistant Honed Tubes are seamless steel tubes that are precision cold drawn or roll formed, followed by a final honing process to achieve exceptionally high internal surface finish and dimensional accuracy. The Offshore and Marine Corrosion Resistant version builds on this foundation, achieving a leap in performance through three key elements.
Excellent Corrosion-Resistant Materials: This type of tubing is typically made from high-grade stainless steels, such as 316/316L stainless steel. The addition of molybdenum (Mo) significantly enhances chloride pitting corrosion resistance compared to 304 stainless steel. For more demanding applications, duplex stainless steels or nickel-based alloys (such as Inconel and Hastelloy) may be used. These offer exceptional strength and enduring corrosion resistance, capable of withstanding the harshest marine environments.
Perfect Internal Surface Quality: The honing process uses oilstone strips to finely machine the inner bore, eliminating microscopic defects and creating a mirror-smooth surface with a uniform crosshatch pattern (surface roughness can reach Ra ≤ 0.4 μm or even lower). This surface not only has an extremely low coefficient of friction, reducing seal wear and piston resistance, but more importantly, its extremely smooth and defect-free nature makes it difficult for corrosive media to find adhesion points and initiation points, fundamentally delaying the initiation of corrosion.
Precise Geometric Dimensions: Honing ensures extremely high straightness and roundness tolerances on the inner tube surface. This ensures smooth and concentric movement of the piston and seal, eliminating eccentric wear and leaks, maintaining high-pressure stability and efficiency over long-term operation, and preventing the intrusion of corrosive media due to seal failure.
In marine and shipbuilding applications, the value of choosing specialized corrosion-resistant honed pipes far exceeds their initial investment cost:
Extremely long service life and extremely low maintenance requirements: Their superior corrosion resistance significantly extends the inspection and overhaul intervals for hydraulic cylinders and the entire system, reducing the significant economic losses caused by downtime for repairs. Reliability is crucial, especially for ocean-going vessels and offshore platforms.
Failure of critical moving components can have serious consequences at sea. Corrosion-resistant honed pipes ensure long-term, stable operation of hydraulic systems under high pressure and load, providing a solid safety guarantee for crew, equipment, and the environment.
Improved system efficiency: The low-friction inner surface reduces energy loss, improves transmission efficiency, and helps reduce equipment operating energy consumption.
Reduced lifecycle costs: Although the unit price is higher than that of ordinary steel pipes, their long service life, low maintenance costs, and high reliability significantly reduce the total lifecycle cost of the project.
This high-end tubing is used in nearly all key components of heavy-duty marine equipment:
Ships: Steering gear hydraulic cylinders, hatch cover lifting cylinders, crane hydraulic cylinders, and fin stabilizer systems.
Offshore Platforms: Drilling platform lifting legs, crane hydraulic systems, compensation systems, and anchor winch hydraulic cylinders.
Offshore Wind Power: Wind turbine installation vessel leg lifting cylinders, crane hydraulic systems, and foundation hydraulic connections.
Subsea Equipment: ROV (Remotely Operated Unmanned Vehicle) control hydraulic arms, valve actuators, and more.
The ocean holds immense resources and opportunities, but it also presents extreme challenges for engineering materials. Offshore & Marine Corrosion-Resistant Honed Tubes perfectly address these challenges through cutting-edge material science, precision manufacturing processes, and deep application understanding.
