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Home Products Ductile iron manhole cover Heavy-Duty Ductile Iron Manhole Cover | Anti-Theft & Impact Resistant | Haierde

Heavy-Duty Ductile Iron Manhole Cover | Anti-Theft & Impact Resistant | Haierde

Cast from high-quality ductile iron via smelting and casting

Spherical graphite structure in ductile iron greatly improves mechanical properties, making it the preferred load-bearing cover for modern municipal roads, expressways, airport runways, port terminals and high-end residential areas.

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Advantages of Haierde Ductile Iron Manhole Cover

High performance from spherical graphite structure: Higher strength than plastic manhole covers which break easily on motor vehicle lanes and community fire exits under rolling loads, solving collapse caused by insufficient bearing capacity.
Precise tolerance & low maintenance: Adequate self-weight matched with well frame limiters and shock-absorbing rubber strips reduce road noise and improve driving comfort, eliminating bouncing and abnormal noise of manhole covers.
Dual anti-slip & aesthetic design: Anti-slip patterns prevent slipping on rainy days, unlike cement covers with peeling surface after long-term rain erosion, solving sanding and slippery surface problems.

Why Choose Haierde Ductile Iron Manhole Cover?

National standard quality guarantee: All finished products pass national standard inspection before delivery.
Complete specifications with in-stock inventory to guarantee construction schedule

Item	Technical Index	Remarks
Executive Standard	GB/T 23858-2009	Complies with national standard
Size Range	φ700mm/φ800mm/φ900mm/φ1000mm	Select based on working conditions
Wall Thickness	30~75mm	-
Well Frame Height	150~200mm	Select based on working conditions
Load Class	B125、C250、D400、E600	Select based on working conditions
Connection Method	Bayonet lock / Anti-theft lock / Concrete pouring	Ensure tightness

Frequently Asked Questions

Q1: Application scenarios for D400 and C250?

A: D400 for urban arterial roads, expressways and large vehicle parking lots; C250 for internal community roads, parking lots and non-motorized lanes.