1. Penetrate from the inner layer to the outside

2. If it cannot be penetrated smoothly, do not use a metal hammer to hit the bent pipe section, which may easily cause deformation of the bent pipe section

3. One worker wears it, and the other worker follows the pipe head and guides the pipe through the baffle at any time

4. If the back of the pipe sheet cannot be penetrated, do not knock it. Another worker should guide from the pipe hole

If a pipe is found to be seriously scratched by the baffle during the pipe penetration process, the inspection and technical department should be notified in time for processing.