... Standard.USAGE:a)For lower liquid transportation, such as water, oil, gas,…etc.:b)Fabrication of steel manufacture, Greenhouse, Scaffolding tube ... welded pipe)& white tube(galvanized steel pipe)-Tianjin Rongxin Steel Co.,ltd.,locating steel basic-Daqiuzhuang Town,Tianjin City,ChinaCONTACT USMr.Song ...