1. GalvanizedSteel pipeGenerally, operations start from the main export, and temporary sealing should be applied to the end of the main export for pressure testing. When design requirements call for asphalt corrosion protection or enhanced corrosion protection, it should be done after prefabrication and before installation. The prefabricated pipes should be transported to the installation site and arranged in order according to their numbers. 2. When selecting galvanizedSteel pipe, pipes with a diameter less than 100mm should use threaded connections, while those greater than 100mm can be welded; any damaged galvanized layer should be treated for corrosion protection; clean the pipe interior before installation, ensure alignment after installation, and verify that the outlet position, direction, and diameter changes are correct. 3. All pipe ends must have temporary sealing applied. | 
