What are the technological processes of seamless steel pipe
2022-01-25 15:23:34 COMMENT：0 HITS：
The general production process of seamless steel pipe can be divided into cold drawing and hot rolling. The production process of cold-rolled seamless steel pipe is generally more complex than hot rolling. The pipe blank must be subject to three roll continuous rolling and sizing test after extrusion.
If the surface does not respond to the crack, the round pipe shall be cut by the cutting machine, and the blank with a growth of about one meter shall be cut.
Then enter the annealing process. The annealing shall be pickled with acidic liquid. During pickling, pay attention to whether there are a large number of bubbles on the surface. If there are a large number of bubbles, it indicates that the quality of steel pipe can not meet the response standard.
The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe. The wall thickness of cold-rolled seamless steel pipe is generally smaller than that of hot-rolled seamless steel pipe, but the surface looks brighter than that of thick wall seamless steel pipe. The surface is not too rough and the diameter is not too many burrs.
The delivery status of hot-rolled seamless steel pipe is generally hot-rolled and delivered after heat treatment. After quality inspection, the hot-rolled seamless steel pipe shall be strictly selected by the staff by hand. After quality inspection, the surface shall be coated with oil, followed by many cold drawing experiments. After hot rolling, the perforation experiment shall be carried out. If the perforation expansion is too large, it shall be straightened and corrected.
After straightening, it is transferred to the flaw detector by the conveyor for flaw detection test. Finally, it is labeled and placed in the warehouse after specification arrangement.
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