As known as;ductile cast iron, nodular cast iron, and spheroidal graphite iron.
Ductile iron has spheroidal graphite, which is different from flake shaped graphite found in grey iron. This spheroidal graphite is accomplished by adding an inoculant; magnesium, to molten iron.
According to BS:EN124
The appropriate class of manhole top or gully top to be used depends upon the place of installation.
Areas which can only be used by pedestrians and pedal cyclists.
Footways, pedestrian areas and comparable areas, car parks or car parking decks.
For gully tops installed in the area of kerbside channels of roads.
Carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.
Areas imposing high wheel loads, e.g. docks, aircraft pavements
Areas imposing particularly high wheel loads, e.g. aircraft pavements.
The following symbols represent the features of Kinam manhole cover. The feature icons are provided for each product as the reference guide.
|Light duty||Standard duty||Heavy duty|