Cast iron drain pipe Maintenance of drain pipes.
Drain pipes need regular maintenance and maintenance during use to ensure their proper working and extended service life. During the maintenance process, the following aspects need to be paid attention to:
1.Regular Inspections: Conduct regular inspections of the drain pipes, including visual inspections, dimensional measurements, mechanical property tests, etc., to find potential problems and deal with them in a timely manner.
2.Cleaning and maintenance: Regularly clean the debris and dirt inside the drain pipe to ensure the smooth flow of water. At the same time, the drain pipe is treated with anti-rust and anti-corrosion to prolong its service life.
3.Repair and replacement: For damaged or aging drain pipes, they need to be repaired or replaced in a timely manner. During the repair or replacement process, the required materials and processes need to be used to ensure that the repaired or replaced drain pipe can meet the actual needs. 
To sum up, the rectangular circular cast iron drain pipe has important application value in the drain of highway bridges. Through its design, manufacturing, installation and maintenance, etc., it can provide a useful reference for the optimization and improvement of highway and bridge drainage systems. At the same time, it is also necessary to pay attention to the selection and adjustment of the actual application according to the specific situation to ensure that the discharge pipe can meet the actual demand and play the best effect.