The ship's piping system is often likened to the vessel's "circulatory system." A single 10,000-ton cargo ship requires tens of thousands of individual pipes. How can these myriad pipes—each with different shapes, bends, and angles—be fabricated both rapidly and with precision? At Jiangsu Haizhongzhou Shipping Industry Co., Ltd. , the answer lies in our Digital Pipe Production Line.
We have completely phased out the traditional manual "lofting and bending" methods, replacing them with data-driven manufacturing derived directly from the 3D design model.
Stage 1: Direct Data Transfer and Nesting Optimization
Pipe model data generated by the design department in software such as Tribon or Aveva Marine is no longer printed as 2D cut-sheets. Instead, this data is directly converted into CNC (Computer Numerical Control) code. Upon receiving this data, our automated fixed-length cutting line selects the appropriate diameter and wall thickness steel pipe from the raw material rack and performs cutting based on an optimized nesting scheme. This process has boosted material utilization by 12% .
Stage 2: Breakthrough in "Weld-Before-Bend" Technology
Traditional methods require bending before welding flanges, which imposes significant spatial constraints. For long straight pipes with large flanges, we have introduced a Medium Frequency Induction Pipe Bender. This equipment heats the steel pipe to a red-hot state using induction and forms a smooth bend radius in a single operation, controlling wall thickness reduction to within 5% . Most critically, the flange is welded by robotic arms while the pipe is still straight. The pipe is only bent after welding is complete, resulting in weld quality that far surpasses manual overhead welding.
Stage 3: Pipe-End Coordinate Measurement and Online Correction
After the bending process is complete, the pipe enters a 3D Measuring, Marking, and Cutting Integrated Machine. A mechanical arm equipped with a laser probe instantly scans the actual bending angles and spatial orientation of the pipe, comparing it against the design model. If springback exceeds the tolerance, the system calculates the required correction and performs online adjustment using micro-pressure or thermal straightening. Finally, the robotic arm executes plasma cutting for openings and saddle cuts based on the true, measured branch positions.
This system has allowed the pipe workshop at Jiangsu Haizhongzhou to bid farewell to the cacophony of hammering and the harsh glare of arc welding, replacing it with the rhythmic hum of synchronized machinery. The pipes we deliver to the ship are clean internally, standardized at every port, and require zero on-site grinding, achieving a truly correction-free installation for the entire piping system.