Last week, we visited the factory to carry out a full operational test of the FX500 butt fusion machine, using it to weld a section of HDPE pipe. The welding was performed according to the standard butt fusion procedure, and the finished joint showed a clean, even weld bead. The overall welding result was very satisfying.
During the test, we also recorded the entire welding procedure to clearly demonstrate how the FX500 operates during an actual welding task.
Preparation Before Welding
Before starting the welding process, both the machine and the pipes must be properly prepared.
The HDPE pipes are first positioned in the machine frame and secured with the clamp inserts. Accurate alignment at this stage is essential to ensure that the pipe ends remain on the same centerline, providing stable conditions for the following facing and welding operations.
After that, the main welding components are prepared, including the facer and the heating plate. At the same time, the hydraulic unit, power supply, and control system are checked to confirm that the machine is ready for operation.
Once these preparations are completed, the welding procedure can begin.
Pipe Facing
Facing is an essential step in the butt fusion welding process. The facer is installed to machine the pipe ends.
This operation removes the oxidized surface layer and ensures that both pipe ends become flat and parallel. Properly faced pipe ends are crucial for achieving a reliable and consistent weld.
After the facing process is finished, the pipe ends are inspected carefully, and any remaining chips or debris are cleaned from the pipe surfaces.
Heating Stage
Once facing is completed, the heating plate is placed between the two pipe ends.
At this stage, the heating plate raises the pipe surface temperature to the required welding level. As the pipe material begins to soften, a uniform melt bead gradually forms around both pipe ends.
Maintaining even heating on both surfaces is important to ensure consistent fusion quality.
Heater Removal and Pipe Fusion
When the required heating time has elapsed, the heating plate is removed quickly, and the two pipe ends are brought together.
The hydraulic system then drives the machine frame forward to apply the specified fusion pressure. During this stage, stable pressure and accurate alignment are critical for achieving a proper weld.
Under controlled pressure, the softened pipe ends merge together and form the fused joint.
Cooling Process
After fusion, the welding pressure is maintained while the joint cools naturally.
The cooling period must follow the recommended welding parameters to ensure that the joint solidifies correctly and retains sufficient structural strength.
Only after the cooling stage is complete can the clamps be released and the welded pipe removed from the machine.
Welding Result
Throughout this operation, the FX500 butt fusion machine completed the entire welding process smoothly. The final weld bead was uniform and continuous, indicating a stable and successful welding result.
This workshop test also provided a clear demonstration of how the FX500 performs during HDPE pipe butt fusion welding operations.
