Nodular cast iron covers often appear in our field of vision, many places in
life can see its shadow, such as: cell, airport, road, the road is more common.
However, manhole covers will also appear in the use of certain failure, then
ductile iron covers how to prevent failure in use? We take a look at it
below.
1, due to the relatively harsh manhole covers use of the environment, in order to avoid rust covers the case, manufacturers in the production or pre-production production process sometimes see rust on stainless steel products or equipment, indicating that serious contamination of surface . The equipment must be cleared of rust before it is put into service. The thoroughly cleaned surfaces shall be inspected for iron and / or water tests.
2, we also need to regularly clean up the surface of the ductile iron cover dust. Steel castings are often made on dusty grounds, often with a lot of dust in the air, which constantly falls on the surface of the equipment. They can be removed with water or alkaline solution. However, grime with adhesion needs high-pressure water or steam for cleaning.
3, in order to prevent the process of lubricant or build-up or dirt retention, we have to maintain the covers on the scratch when scratches and other rough surface mechanical cleaning.