... AISI,GB,DIN Stainless steel seamless pipeNantong Sanzhong Pipeline Co., Ltd.Black Steel Pipe and Hot dip Galvanized Steel Pipe ... tube, high tunnel pipe, square tube, welded pipe manufacturing and provides services for fabricated operation and hot-dip processing ... petrol, chemical, pharmacy, foodstuff, machinery,spaceflight, war industry, hardware, boiler gas, hot-water heating parts, shipping, power and ...