... cleanly and nominally square with the axis of the tube and free from excessive burrs.PROPERTIES:a)Chemical ( ... etc.:b)Fabrication of steel manufacture, Greenhouse, Scaffolding tube, Furniture making,Fencing.PLACE OF ORIGINCHINA,TIANJINTARGET MARKETBrazil ,Malaysia, America,Indonesia ... of black pipe(carbon steel welded pipe)& white tube(galvanized steel pipe)-Tianjin Rongxin Steel Co.,ltd.,locating ...