Ductile Iron Manhole Cover
Ductile iron manhole
cover means the manhole covers made by
ductile iron, not by gray iron. The
buyers choose the ductile iron to get
better tensile strength.
Ductile iron manhole covers are easily
to purchase in China since most of iron
foundries can produce these materials,
and the machining is simple
aluminum patterns are
usually needed for the production, and
since manhole covers are large, so the
pattern costs are high, but you should
use the aluminum patterns to keep the
As for the casting
process, for the large manhole covers
over 500mm, they should be made by
resin sand casting process to
meet the dimension requirements. For the
smaller manhole covers, you could
sand floor molding process. The
automatic molding line is not
suitable for the manhole covers since
they could not keep the hot iron in the
molds as long as enough.
As for the inspection to manhole covers,
firstly, the material is important,
secondly, the flatness and fitness,
thirdly, the surface quality and
As we know, the following foundries made
ductile iron manhole covers before, and
hope these information could help you to
learn more about ductile iron manhole
covers. Of course, our
Dandong Foundry can make
the manhole covers very well.
Shijiazhuang Zhongrun Casting &
Grade: B125 C250 D400 E600 F900 EN124.
Manhole covers and Frame conforming to
EN124 standard, Gully, Trench Grate and
grate also Available.
Material: Gray Iron: GG20. Ductile iron:
Main product: Manhole cover, Gully
grate, Surface box, and so on.
Cangzhou Yadite Casting Machinery
The Standards: EN124.
Size range: DN200 - 1500mm.
Class: B125, C250, D400, E600, F900.
Shape: square, round, rectangle.
Material: Ductile iron, cast iron.
Paint: Epoxy painting or bitumen.
Packing: Wooden pallet and PVC thin
environmental protection with
non-toxicity raw material, it will not
influence to user.
longevity corrosion resistance anti-rust
insulation anti- abrasion weather
ability excellent anti-pressure
competitive price the price is lower
than stipulated standard.
low weight it's convenient to transport
install construct easily and reduce
nice appearance rich colors and can keep
anti- theft non-recycle anti-theft
smooth and free from sand holes, below
holes, distortion or any other defects.
Handan Fumei Machine Manufacturing
ductile iron manhole cover.
Complies with requirements of EN124.
Type: Square, round, triangle.
Qingdao Xinruisheng Industrial
production standard: EN124 from A15 to
Material: grey iron, ductile iron.
Type: round type and Square type,
Standard: ISO9001, EN124.
Applicable medium: gases, liquids,
Material: ductile iron, gray cast iron.
Black bitumen coated and hot galvanized.
Smooth surface and anti-theft.