Method of cutting spiral steel pipe

　　At present, the most common method of pipe cutting by spiral steel pipe manufacturers is that the plasma is cut. When cutting, a large amount of metal vapor, ozone, and nitrogen oxide dust will be generated, which will seriously pollute the surrounding environment. The key to solving the soot problem is how to inject all the plasma dust into the dust removal equipment to prevent air pollution.

　　For plasma cutting of spiral steel pipe, the difficulty of dust removal is:

　　1. When the nozzle of the plasma gun is cut, the air is blown out in two opposite directions at the same time, so that the smoke emerges from both ends of the steel pipe, and the suction port installed in one direction of the steel pipe is difficult to recover the smoke well.

　　2. The cold air around the suction port enters the suction port from the outside of the machine and the air volume is large, so that the total amount of smoke and cold air in the steel pipe is larger than the effective air volume sucked by the dust collector, so that the complete absorption of the cutting dust becomes impossible.

　　3. Since the cutting part is far away from the dust suction inlet, the wind reaching the suction port is difficult to pulsate the dust.

　　For plasma cutting of large diameter spiral welded pipe with a diameter of about 800 mm, this method can be adopted; for a diameter of less than 800 mm, the small diameter of the pipe can not emerge from the direction of the pipe, and it is not necessary to install an internal baffle. However, at the suction inlet of the former, there must be an external baffle that blocks the entry of cold air.

　　http://www.xysteelpipe.com/info/Method-of-cutting-spiral-steel-pipe-1443-1.htm

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