Round D400 heavy duty manhole cover.
• Material: Ductile Iron GJS500-7
• Duty Class: EN124 D400
• Frame Style: Bottom Flange
• Gasket Material: Neoprene
• Lock Material: SS304
• Coating: Black Bitumen
• Standard: EN124-2015
• Surface Pattern:Customized
• Surface text:Customized
Our round D400 heavy-duty manhole covers are engineered for high-load applications, making them ideal for urban roads, highways, and commercial infrastructure. Made from premium ductile iron, these covers offer superior strength, impact resistance, and durability under heavy traffic conditions. Compliant with EN 124-2 standards, our D400 manhole covers ensure safety and long-lasting performance. Available in various sizes with anti-slip surfaces and secure locking systems. Contact us today for customized solutions and bulk orders.
With 30+ years of expertise in precision ductile iron casting, our ISO-certified foundry has been a trusted exporter to EU and Australian infrastructure markets since 2001. We build strategic alliances through customized OEM/ODM solutions, offering end-to-end support from prototype engineering to global supply chain management.
Details
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Item |
round sewer ductile iron manhole cover |
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Brand name |
CastKing or OEM |
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Size |
200mm-1000mm |
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Type: |
Round,square |
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Material |
Gray Iron, Ductile Iron, Malleable iron |
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Coating |
Cold applied black bitumen Antirust oil, Plating, Paint, Powder Coating, epoxy coating or as per customers' requirement. |
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Application |
Municipal construction |
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Loading pressure |
EN124 A15,B125,C250,D400,E600,F900, or as per customers' drawings or samples. |
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Advantages |
Anti-noise ,Anti-theft,anti-rust,long life service. |
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Package |
Pallet and wooden case,or as per customers’ requirements |
FAQ
- Why are most manhole covers round?
Manhole covers are round because a round cover cannot fall through its circular opening. The manhole cover rests on the frame seat; therefore, the diameter of the frame opening is smaller than the manhole cover. Whereas a square or rectangular manhole cover may fall through an opening if turned diagonally in the hole. It is also easier to dig a circular hole. Round covers are easier to machine on a lathe. A round manhole cover can be rolled, which makes it easier to move if needed.
- Why ductile iron?
Spheroid Graphite' or 'Ductile Iron' is a unique form of Iron. which prior to the metal casting process receives crucial mineral additives to produce an exceptionally strong resistance and durable metal, the molecular structure of 'Ductile Iron' gives rise to excellent additional strength and shock load resistance, within structure carbon steel, without steel inheriting corrosion. In today's roads, Covers & Gratings are required to carry increasingly heavy and fast moving traffic, yet the need to keep the roads in service, places free from accidents and theft, additional demands on those Covers and Gratings in terms of speed and ease of access for maintenance of services is essential. 'Ductile Iron' Manhole Covers, Gratings and Frames are fast replacing the conventional 'Grey Iron Manhole Covers, Gratings and Frames on account of uniqueness in its Strength to Weight ratio, Design, Weight and the Cost benefit.
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