Energy Steel Industrial Co.,Ltd is a large investment group established in 2010 ,specialized in steel pipe designing,manufacturing, stocking and exporting in China. As one of the leading supplier of steel products in China ,we, Energy Steel Industrial Co.,Ltd ,With annual production capacity of more than 400million Metric Tons and annual sales amount more than USD 5 billion,mainly of our products are exported to all over the world ,which can meet standard of API ,DIN ,EN ,JIS...