DPI PROCEDURE
-surface cleaning with brushing and clean it without any dirt, lint-free and oil
-access the remover agent on the butt joint to make sure it clean and dry.
-wait for 5 minutes
-then apply the dye penetrant (red dye) on the butt joint with spraying it at the weld zone.
-wait for dye penetrant time for 5 minutes
-then apply the developer with spraying it smoothly thin layer at angle 45 degree.
-wait for developer weld time for 8 minutes
-after 8 minutes, we can get indication the defect so that we must measure the length of defect with ruler besides identified the kind of defect.
-lastly post cleaning, after using it...
MPI PROCEDURE
-surface cleaning
-on the yoke and press ac current
-applying the white contrast on the butt joint
-wait for 5 minutes
-put yoke on the butt joint, while spray it with magnetic particle black ink angle 45 degree.
-wait for 5 minutes or wait until indication appear.
- when the indication found appear, we can detect the types of defect. measure the length of defect with ruler and identified type of defect.
-lastly post cleaning...
