This series is mainly used for shot and air blast of inside wall of steel tube.Within the range of

Ø50~Ø700mm inner tube diameter,it utilizes continuous-working high-efficient air blast apparatuses,sprays steel shots and quarts sand to each position of inside wall of the steel tube to do cleaning;Within the range of Ø700~Ø3000mm inner tube diameter,it utilizes high-speed shots thrown by high-efficient air blast apparatuses to crash roll scale,rush layers and other sundries on the inner surface of the steel tube,obtains delicate and bright surface,promotes tensile strength and anti-pressure strength,increase adhesive for painting protection of inner surface,to achieve the purpose of antisepsis,protecting the tube and prolonging use life of steel tube.