Steel Pipe External & Internal Shot Blasting Systems

Raw steel pipes from manufacturing processes carry heavy mill scale, surface oxides, and deep atmospheric rust. Steel Pipe External & Internal Shot Blasting Systems treat these metal surfaces to achieve the strict Sa 2.5 cleanliness standard required for subsequent structural welding, 3PE, or FBE anti-corrosion coating lines. This specialized machinery runs continuous descaling operations on both exterior walls and interior tube cavities by deploying high-velocity mechanical blast wheels alongside high-pressure air blasting lances.

External surface processing relies on a heavy-duty skew roller conveyor line arranged across the workshop layout. This driving mechanism automatically rotates the steel pipe while pushing it forward along a continuous spiral path directly into the main blasting chamber. Top-mounted heavy-duty blast wheels discharge high-velocity steel shots onto the spinning workpieces, producing a uniform anchor pattern and consistent surface roughness across the outer wall without leaving any blast blind spots.

Internal pipe cleaning divides into distinct mechanical methods based on the specific target tube diameter. Small and medium pipes use automated hydraulic cantilever lances to push pressure nozzles inside the moving tube core for targeted air blasting. Large diameter lines deploy mechanical internal blast wheel units inside the pipe belly for high-volume throwing. Both methods utilize heavy-duty inner screw conveyors and vacuum systems to reclaim spent steel shots from the pipe interior.