... length reaches 22 meters long. We, Hebei Changxin Steel Pipe Co., Ltd,China,which have the first-class specialized ... ,including seamless steel pipe, high-frequency electric-welded steel pipe (ERW),hot-rolling steel pipe ,hot expand steel pipe, stainless steel pipe ,steel strip,ect ... American code, English code, Japan and German code. The steel pipe carries out the standard: GB/T3091 - 2001, GB/T8163 ...