随着国民经济的发展,钢管的需要量不断增长。80年代初世界钢管产量占粗钢产量的10％左右。近年来由于大力发展连铸,可为无缝钢管提供圆管坯或空心管坯,致使无缝钢管的成本大幅度下降。但随着热带钢轧机的大型化、连续化、自动化,实现了高产 With the development of the national economy, the demand for steel pipes is constantly increasing. In the early 1980s the world’s steel pipe production accounted for about 10% of crude steel production. In recent years, due to the vigorous development of continuous casting, seamless pipe can provide round tube or hollow tube, resulting in a substantial decline in the cost of seamless steel tubes. But with the large-scale tropical strip mill, continuous, automated, to achieve high yield