... 3.Manufacturer in Tianjin,China q235 2.5 inch SCH40 Black Carbon Steel Black Iron Pipe Weights 1)Standard: ... and so on. 3.About usTianjin Shining Steel Pipe Co., Ltd. is a group that has two ... companies: Tianjin Shining Steel Pipe Co.,Ltd and Tianjin Shining Trading Co.,Ltd. ... seamless steel pipes,steel strips,H&I Steel and pipe fittings,on which we have stable and fixed cooperators ...