... surface of steel pipes, remove the scales and weld dregs, make it show metal color, increase its ratio surface and weld ... dregs, make it show metal color, increase its ratio surface area, and ... to 2800mmTechnical Specification of steel pipe blasting machine:Model: QGW 101. Pipe diameter: Φ19- Φ 77 mm2. Pipe length: 76203. Pipe moving speed: 18.3 ...