Ductile iron manhole covers are made from gray cast iron, malleable cast iron, and ductile iron as raw materials, produced through the casting process. After heat treatment, these metal products possess certain characteristics such as flexibility, dust resistance, and corrosion resistance. The main materials for cast iron manhole covers include gray cast iron, malleable cast iron, and ductile iron. This product is widely used in many places, with gray cast iron being the most commonly applied.
Cast Iron Manhole Cover Features: 1. High-Temperature Antioxidation: Resists oxygen in the air to prevent rust. 2. Moss-Resistant and Corrosion-Proof: Smooth surface like a mirror, excellent anti-slip performance (can be washed with water).
3. Superior Performance: Cast iron manhole covers offer excellent mechanical properties and molding performance. 4. Easy Cleaning and Maintenance: No need for personnel maintenance, just regular wiping and cleaning can ensure a lifespan of 10-15 years or more.
5. Environmentally Friendly: Trace amounts of substances have been added during production, posing no pollution to the environment. 6. Aesthetically Pleasing: Meticulously crafted with advanced technology, featuring a mix of gray and white hues. 7. Versatile Applications: Suitable for installation on various roads and locations.
What are the differences between cast iron manhole covers and ductile iron manhole covers?
What is a Ductile Iron Manhole Cover? In our daily life, as urban construction continues to expand, asphalt is laid on sidewalks and highways. Products made from this material are called "Ductile Iron Manhole Covers," which are produced by stone, cement, and high-temperature casting. Due to their shape resembling the ancient warwheel used in ancient battlefields, they are named "Ductile Iron Manhole Covers."
Ductile iron manhole covers are circular or polygonal castings, typically 1-3.5 cm in diameter and 6-15 meters in length, rolled from steel strips. They are widely used in various aspects of people's lives due to their aesthetic appearance. Not only do they effectively prevent rain and small animals from damaging the internal facilities of underground garages, but they also serve as decorative elements, making them extensively applied in urban greening and garden attractions.
In compliance with national standards, the thickness of heavy-duty ductile iron manhole covers should be approximately 13mm or more to ensure load-bearing capacity. The specifications of ductile iron manhole covers adhere to the GJ/T121-2000 standard, with extra-heavy-duty covers being at least 70mm thick, standard covers at least 50mm thick, and light-duty covers at least 20mm thick.
The carrying capacity of heavy-duty ductile iron manhole covers is 400KN at a safety rating of 9, exceeding 40 tons. The net weight of a 700mm diameter, two-layer ductile iron manhole cover rubber support is 112Kg, while the net weight of a 700mm diameter, lightweight ductile iron two-layer manhole cover rubber support is 89Kg.
Manhole cover specifications and models include 500*500B125, 500*500B125, 600*600B125, C250700*700B125, 450*750B125, C250700*800B125.
Heavy-duty ductile iron manhole covers are mainly used for: power supply in urban planning and construction, sewage pipeline inspection wells, heating, natural gas inspection wells, postal and express delivery, telecommunications network, communication optical cable manholes, power engineering pipeline wells, road lighting wells, fire safety wells, all kinds of rainwater wells, anti-corrosion and thermal insulation projects, open water channel covers, and can be custom-manufactured according to unique customer requirements.
Heavy-duty ductile iron manhole cover features:
1. Long lifespan: Corrosion-resistant, zero pollution, maintenance-free, suitable for over 50 years of use.
2. High Load Capacity: Significantly exceeds that of other product types, capable of withstanding heavy loads without risk of cracking or accidents such as vehicle falls, ensuring safe production.
3. Anti-theft: General anti-theft design solutions, new-style anti-theft design solutions, covers and frames connected with high-strength bolts, integrated design.
4. Anti-jump Lid: Utilizes shock-absorbing rubber rings to ensure the vehicle operates quietly over time, complying with environmental protection regulations.
5. High safety factor: The manhole cover fits tightly, preventing jumping, rocking, squeaking, or shifting, ensuring quiet operation and reliability.
6. Aesthetically Pleasing: Cleanses urban natural environment, applies gray-black asphalt coating, ensuring the product has a bright, clean, and tidy appearance.
7. Anti-Slip Surface: The manhole cover features a designed anti-slip pattern on the surface, enhancing sliding friction and preventing falls by pedestrians due to rain, snow, or ice cover.
