Drill Pipe that has been used in drilling typically has a thick crust of rust and dirt after being stored in the field. If the pipe is to be reused, it must be inspected and tested to determine whether or not it is still suitable for reuse. Therefore, the surface of the pipe must be clean from any contamination before testing the pipe, and an effective process for cleaning is dry / wet sandblasting, and to reduce sandblasting dust pollution in the environment, wet sandblasting is performed.