Galvanized Steel Pipe/tube DN20-DN250*1.2MM-8MM Zinc thickness: 200-450g ... transportation, such as water, oil, gas,…etc.:b)Fabrication of steel manufacture, Greenhouse, Scaffolding tube, Furniture making,Fencing.PLACE OF ORIGINCHINA ... in the field of black pipe(carbon steel welded pipe)& white tube(galvanized steel pipe)-Tianjin Rongxin Steel Co.,ltd.,locating steel basic-Daqiuzhuang Town,Tianjin City ...