To prevent the nodular cast iron manhole cover from being eroded underground and extend the service life of the pipe network, the outer surface of the nodular cast iron manhole cover should be coated with a layer of asphalt paint, and then packed into the warehouse. In order to further enhance the corrosion resistance of cast iron manhole covers, cast iron manhole covers manufacturers need to spray zinc on the outer surface of ductile iron manhole covers. We can do a variety of surface treatment of cast iron manhole covers.
Understanding Saddle Clamps