Professional welding preparation: The key to reliable and reproducible welding results
A professional welding preparation is the first step towards reliable and reproducible welding results without welding defects such as porosity or binding defects. The basis for this is gap-free positioning, i.e. the centered and ring-shaped fixing of the tubes on the area to be welded tube position.
benefits the pipe fixation
Pipe clamping is a beneficial welding preparation for any tube position: flush, recessed, or protruding. When fixing a pipe, the tube is expanded precisely at the point where the weld will later be made. The gap between the tube and the hole in the pipe end is closed, yet still allows for ideal degassing during the welding process.
fixing vs. stapling: A comparison
fixing:
The tube is positioned centrally in the hole.
Ideal degassing during the entire 360° welding cycle.
Mechanical expansion of the pipe without the use of additional material.
No welding experience required.
Stapling:
The tube is pulled to the stitching point, which causes a larger gap on the opposite side.
Dirt is pushed in front of the arc and contaminates the weld seam in the last quarter.
tube and tube sheet are hardened by heat input.
Additional material and/or melting of the pipe at the tacking point.
Professional welder required.
Summary
Only proper pipe clamping ensures high-quality welds free of pores and defects. By following these steps, the likelihood of welding defects can be significantly reduced, resulting in durable, high-quality welds. The first step is to ensure proper welding preparation and only then the welding technique.
welding preparation, which ensures reproducible results
Which spreading tools are suitable for your pipe dimensions depends on Tube inner diameter and the desired tube position . We’ll be happy to advise you and can also manufacture custom sizes upon request.