How To Distinguish Hot Expansion and Hot Rolling Seamless Steel Tube

 　　Heat-expanded steel pipe: First of all, in the appearance of the steel pipe, the heat-expanded steel pipe is red, and the inside diameter is lead powder.

　　In order to stop the hot expansion of steel pipes, the quality requirements of steel grades are very strict. Usually, steel pipes with strong shrinkage are used, and a kind of barren pipe finishing process is used to expand the diameter of pipes by skew rolling or drawing. In this way, the steel pipe can be roughened in a short time to consume non-standard and special hot-rolled pipes. This kind of hot-rolled steel pipe has low cost and high consumption efficiency. However, the mechanical properties of the hot-expanded steel pipe are slightly worse than those of the hot-rolled steel pipe.

　　Hot-rolled steel pipe is more and more recognized because of its reasonable process, low energy consumption and good quality. Hot-rolled steel pipe is purchased for important parts because of its high cost when consuming large caliber. Therefore, hot-rolled and hot-rolled seamless pipe of American Standard depends on the comprehensive consideration of application location and price.

　　Generally speaking, both hot-expanded steel pipe and hot-rolled steel pipe have strict requests for steel grades used in manufacturing steel pipe. Hot-expanded steel pipe is only a manufacturing process of steel pipe, which is to process small-caliber steel pipe into large-caliber steel pipe.

　　http://www.xysteelpipe.com/info/How-To-Distinguish-Hot-Expansion-and-Hot-Rolling-Seamless-Steel-Tube-1890-1.htm

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