What type of resistance does cast iron have that makes it suitable for sewage and storm drainage lines?

Cast iron is primarily known for its corrosion and abrasion resistance, which makes it particularly suitable for applications like sewage and storm drainage lines. The environment in which these materials operate involves exposure to various corrosive substances, including chemicals and biological materials typically found in waste. Cast iron’s ability to withstand corrosion ensures its longevity and durability, reducing the chances of failure or leaks in these critical systems.

Additionally, cast iron is inherently stiff and hard, providing excellent abrasion resistance. This characteristic is crucial when dealing with the flow of solids in sewage systems, as well as the wear and tear from sand and other particulate matter that can be present in stormwater. These combined qualities of corrosion and abrasion resistance make cast iron a favored choice for the reliable and long-term infrastructure of drainage lines.