Great year-round supply of steel companies in Jiangsu large-diameter seamless steel pipe 
 Great year-round supply of steel companies in Jiangsu large-diameter seamless steel pipe 
 Large-diameter seamless steel pipe, the main production process for large-diameter hot-rolled seamless steel pipe seamless steel pipe diameter and thermal expansion, thermal expansion seamless steel pipe in size of the thickest line 150307-77267 * 1220 120, thermal expansion seamless steel pipe can be production of non-national standard size, thermal expansion seamless is what we often say that the thermal expansion of pipe, the density is relatively low but the contraction of a strong steel drawing with cross rolling method or methods to expand the diameter of a pipe waste pipe finishing process. In the short period of time to make thicker steel to produce non-standard and special types of seamless, low cost, high efficiency, is the rolling fields of international trends.