The device is sandblasting machine press send high-speed mixed flow of air abrasive jet to the conical nozzle of the pipe wall cleaning, abrasive oriented to form a cone shape of the diffusion and thus the impact of the pipe wall to reach the pipe wall clean-up purposes. 
 Blast cleaning of the pipe wall is a special metal pipe wall cleaning apparatus is an extension and development of the pressure feed blast cleaning. The device is the key equipment for pipeline internal coating operations, so that the pipe wall surface treatment up to Sa2.5 level-Sa3 level 
 Can greatly improve the service life of pipeline corrosion. Handle diameter 50mm-900mm pipe, tube length is generally less than 20m.