... technology,castings or machined parts.Shot blast surface. Features to Casting,Pipe Fitting,Cast Pipe. 1.Material :GG20 or GG25.2.Unit ... facilities:cupola furnace or medium frequency induction electric furnace.5.Casting Inspection:direct-reading spectrum instrument,metallographic analysis,ultrasonic inspection,magnetic ... ,butterfly valve body,ball valve body,Fire hydrant,Cast pipe,pump body.