The cold-drawn precision steel pipes are sent to the cooling bed for cooling after piercing, rolling, leveling, sizing and reducing and other hot pressure processing procedures. The cooling bed types used in the precision drawing steel pipe workshop are: chain cooling bed and rack cooling bed , Spiral cooling bed, walking cooling bed, etc. After cooling, the precision drawn steel pipe needs to be sawed to cut the head, tail and cut to length. In order to make the end face of the precision drawn steel pipe straight, smooth and free of burrs, a machine tool is often used to cut the steel pipe to a fixed length. In order to eliminate the bending of the steel pipe during processing, cooling and transportation. To ensure the best quality and increase the yield, the steel pipe should be straightened. The straightening of the steel pipe is usually done on various types of inclined roller straighteners. The fine drawn steel pipes processed by the above-mentioned finishing processes must undergo inspections including: surface quality, size, shape and other appearance inspections, and chemical composition, physical and mechanical properties inspections according to national standards and order contracts, such as pressure resistance, Crimping, flattening, mechanical properties and metal structure, etc. Finally, it can be stored and shipped as a light pipe. A small number of steel pipes that have defects on the surface but can be repaired can be repaired with a grinding wheel and then passed inspection before leaving the factory.
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