Hunan 35 # small diameter seamless steel pipe supplier Liaocheng Jiayi Metal Materials Co., Ltd. was founded in 2004, consists of three subsidiary companies, is a small-caliber seamless steel tubes, thick-walled seamless steel pipe, high pressure alloy tube, precision seamless tube , large diameter seamless steel pipe, stainless steel pipe large-scale production and supply companies, approved by the Shandong Provincial Foreign Economic and Trade Office, import and export management rights, is a production, trade and services, new product development in one of the provincial large steel companies. The company currently has: 60, 90 punching machine, cold call six production lines, hot-rolled production line, mainly produces cold-rolled seamless steel tube outer diameter of 20mm-127mm; two of 325mmASSRL pipe rolling mill, the Department of the largest three-roll rolling machine using mandrel pre-wear and limitations of small cycles, three computer-controlled automation systems, have reached the international advanced level, mainly produce diameter 133mm-1020mm, wall thickness of 16mm-300mm, outer diameter precision ± 0.5%, thickness accuracy ± 5% of hot-rolled seamless steel pipe. Liaocheng Jiayi Metal Materials Co., Ltd. Hunan ||| 35 # small diameter seamless steel supplier