Working principle of sandblasting: Adopting pressure sandblasting processing, which utilizes the pressure, flow rate, and flow rate of compressed air to spray sand onto the metal surface, achieving cleaning effect.
1) The sand material sprayed onto the metal surface is subjected to impact grinding on the metal surface, removing impurities and oxide skin from the inner wall of the pipeline, increasing the surface area, improving the adhesion of the coating, and improving the coating quality.
2) It can disperse the residual stress inside the pipeline structure, achieve hardening of the inner wall of the pipeline, increase the resistance of the inner wall to plastic deformation and fracture, and generate compressive stress on the inner wall of the pipeline, improving its fatigue strength.
3) Reduce defects on the inner wall of the pipeline and damage caused by mechanical processing, thereby reducing stress concentration.
Sandblasting machinery and equipment
2-1. Sandblasting equipment: press in mobile sandblasting machine, inner wall sandblasting machine, and air compressor.
2-2. Sandblasting medium: 1.0-2.0mm brown corundum or quartz sand, etc.
2-3. Sandblasting workpiece material: XXmm thick steel pipeline.
2-4. Maximum size of a single pipeline: 12000mm (length) x 300mm (diameter).
2-5. Processing method: After the mobile sandblasting machine is connected to the inner wall sandblasting machine and air compressor, the inner wall sandblasting machine is extended from one end of the pipeline to the other end to start sandblasting. The inner surface of the pipeline is rotated and scanned, and the inner wall sandblasting machine is gradually moved back until the inner surface of the pipeline is sprayed, achieving a cleaning level of Sa2.5.
2-6 Sandblasting cleaning efficiency: It takes about 30 minutes to clean the inner wall of a single piece of pipeline (12000mm (length) x 300mm diameter).
Audited Supplier 
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