... -25500.5-1019-114 0.9-2.5 Pre galvanized steel pipeTOLERANCE:a)On specified OD+/-0.5(Ovality0.5mm):b ... transportation, such as water, oil, gas,…etc.:b)Fabrication of steel manufacture, Greenhouse, Scaffolding tube, Furniture making,Fencing.PLACE OF ... of black pipe(carbon steel welded pipe)& white tube(galvanized steel pipe)-Tianjin Rongxin Steel Co.,ltd.,locating steel basic-Daqiuzhuang Town,Tianjin ...