Do you know the production process of seamless steel pipe?
The delivery state of hot-rolled ASTM A106 SCH40 Q345B Seamless Steel Pipe is generally after heat treatment. The hot-rolled seamless steel pipe shall be strictly selected by the staff after the quality inspection. After the quality inspection, the surface shall be coated with oil, followed by many cold drawing experiments. After the hot-rolled treatment, the perforation experiment shall be carried out. If the perforation diameter is too large, the straightening correction shall be carried out. After straightening, it is transmitted to the flaw detector by the transmission device for flaw detection test, and finally it is labeled and placed in the warehouse after specification arrangement.
The outer diameter of the hot-rolled seamless pipe is generally larger than 32mm, and the wall thickness is 2.5-200mm. The outer diameter of the cold-rolled seamless pipe can be 6mm, the wall thickness can be 0.25mm, and the outer diameter of the thin-walled pipe can be 5mm, and the wall thickness is less than 0.25mm. The size accuracy of the cold-rolled seamless pipe is higher than that of the hot-rolled seamless pipe.
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