Cold and hot rolling of steel pipe production process, these two kinds of process of pipe quality have different performances and functions. The Anji County Peng big steel pipe manufacturers is able to tell the difference between them.
Cold rolled steel pipe allows local buckling section, which can make full use of the bar buckling bearing capacity.
Hot-rolled steel pipe diameter is generally greater than 32mm, the wall thickness of 2.5-75mm, cold rolled seamless steel pipe diameter can be 6mm, the wall thickness can be 0.25mm, thin wall pipe diameter can be less than 5mm thickness of 0.25mm, cold rolling than the high dimensional precision.
The reasons for the residual stress of hot rolled steel pipe and cold rolled steel pipe are different, so the distribution of the cross section is very different. The residual stress distribution on the section of cold-formed thin-walled steel is curved, and the residual stress distribution on the hot rolled steel pipe or welded steel section is thin film type.
The torsional rigidity of hot-rolled steel tube is higher than that of cold rolled steel tube, so the performance of hot rolled steel tube is better than that of cold rolled steel tube.