Hengyang Valin Steel Tube Co. Ltd._
Jan 21, 2018· Hengyang Valin Steel Tube Co. Ltd. (hereinafter referred to as HYST) is a subsidiary of Hunan Valin Iron Steel Group Co., Ltd. founded in 1958, is one of the seamless steel tube pipe enterprises with the most entire rolling mills, advanced equipment and complete product specifications whose production scale has been tanked the globe fifth by Metal Bulletin US.