... . 21mm-457mm 3)W.T. 0.8mm-16mm hot G.I. steel pipeHot GI pipeSize Wall thickness (W.T.)1/2 ... strcuture,Shipbuilding,Bridging,Automobile chassisMain marketMiddle East,Africa, Asia and some Uropean country and America ,AustraliaCountry of originChinaProductivity3000 Metric Tons pet ...