... used for removing rust and enhancing adhesion before hull painting.3. Other industries: Oil tank rust-removing and reinforcing; corrosion protection ... , sediment, coal injection truck, bulk cement truck, sandblast, big inch grout hose, white powder and dredging.Blasting materialsQuartz sand, steel shot, sediment ... -1/4,1-1/2,1-3/4,2,2-3/8,2-1/2,3,3-1/2,4,5,6,7,8,10,12,18 ect. 2 inch concrete pump Hose