What are the cutting methods for thick-walled spiral steel pipes

1. mechanical cutting adopts external installation and internal installation. it uses the turning tool processing principle to cut and bevel the pipe mouth. the single machine has a large span, can process large thicknesses, has less waste, is pollution-free, and does not produce high temperatures during the processing. it does not affect the pipe material and is conducive to welding. water cutting uses a high-pressure pump and emery to process pipes. its cuts are clean and the processing span is large. however, its efficiency is low and the processing thickness is seriously limited.

2. oxyacetylene flame cutting, by adjusting the oxygen valve and acetylene valve, the mixing ratio of oxygen and acetylene can be changed to obtain three different flames: neutral flame, oxidizing flame, and carbonizing flame.

3. ion cutting, plasma cutting with different working gases can cut various metals that are difficult to cut with oxygen cutting, especially for non-ferrous metals (stainless steel, aluminum, copper, titanium, nickel), the cutting effect is better; its main advantage is the cutting thickness when cutting small metals, plasma cutting speed is fast, especially when cutting ordinary carbon steel thin plates, the speed can be up to 5 to 6 times that of oxygen cutting. the cutting surface is smooth, the thermal deformation is small, and there is less heat-affected zone.