What must be checked regularly to ensure the integrity of ductile iron pipe?

Regularly checking corrosion protection for ductile iron pipe is essential because this type of piping is particularly susceptible to corrosion, especially if it is exposed to moisture or aggressive soil conditions. Corrosion can significantly weaken the structural integrity of the pipe, leading to leaks, pipe failure, and ultimately compromising the water distribution system.

Ductile iron pipes are usually coated with protective materials, such as epoxy coatings or external wraps, to mitigate the effects of corrosion. Inspections can involve checking these protective coatings for any damage or degradation and ensuring that cathodic protection systems are functioning properly. By maintaining effective corrosion protection measures, the longevity and reliability of ductile iron piping can be maximized, thereby ensuring continuous, safe water distribution.

In contrast, aspects such as thermal expansion, flow rates, and pipe alignment, while important, do not directly address the immediate threat posed by corrosion to the integrity of ductile iron pipes. These factors can impact system performance, but regular checks of corrosion protection are crucial for preventing structural failures from corrosion-related issues.