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China-based foundries provide high-strength ductile iron covers (GGG50/QT500) produced via resin sand casting, offering excellent dimensional accuracy and surface quality, frequently for EN 124 D400 or C250 standards. These custom OEM products are ideal for high-load urban roads, and they often include anti-theft, sealing, and customized logo features.

Key Features of Chinese Resin Sand Ductile Iron Covers:

Production Method: Resin sand casting is preferred for large and high-precision manhole covers to ensure better tolerance control than traditional green sand casting.
Material Strength: Uses ductile iron (typically QT500-7) to provide high tensile strength and elongation, making them suitable for heavy-duty applications.
Customization: Factories offer customization of size, shape (round or square), and surface patterns/logos, frequently using CAD design services.
Standards: Products often meet or exceed BS EN 124 standards (A15, B125, C250, D400, E600, F900).
Surface Treatment: Usually coated with black bitumen to resist rust and corrosion.

Common Applications:

D400 (40 Ton): High-speed roads, heavy traffic areas.
C250 (25 Ton): Residential quarters, side streets.
B125/A15: Sidewalks, pedestrian areas.

Web results

China china resin coated sand casting ductile iron detail ...

zzhccast.com

https://www.zzhccast.com › resin-coated-sand-casting-d...

zzhccast.com

https://www.zzhccast.com › resin-coated-sand-casting-d...

Cast Material: Ductile Iron. Casting Process: Resin Sand Casting. Surface Treatment: Shot Blasting. Model Number: OEM. Origin: Zhangzhou,China.

Ductile Iron Resin Casting Manhole Cover with Coating

Made-in-China.com

https://mdlily.en.made-in-china.com › ... › Sand Casting

Made-in-China.com

https://mdlily.en.made-in-china.com › ... › Sand Casting

Details · 1. Material: cast gray iron, ductile iron. · 2. Shape: round, square, rectangle and triangle. · 3. Diameter: from 200mm to 1200mm. · 4. Weight: from 7kg ...Read more

· Review by MIC_BUYER

Cast Iron Manhole Cover Made in China

Dandong Foundry

https://www.iron-foundry.com › cast-iron-manhole-cover

Dandong Foundry

https://www.iron-foundry.com › cast-iron-manhole-cover

As for the large manhole covers, most of iron foundries will produce them by resin sand casting process. Small manhole covers are usually made by green sand ...Read more

Custom China resin sand casting ductile iron cover,OEM/ODM ...

zzhccast.com

https://www.zzhccast.com › china-resin-sand-casting-du...

zzhccast.com

https://www.zzhccast.com › china-resin-sand-casting-du...

We will analyze all aspects of your metal casting project to ensure meet your delivery timeable with the quantity, quality, price and repeatability your demand.

Customize Water Road Application Resin Sand Casting Well ...

Made-in-China.com

https://hangxingmanholecover.en.made-in-china.com › ...

Made-in-China.com

https://hangxingmanholecover.en.made-in-china.com › ...

En124 China Square and Round Ductile Iron Manhole Cover. US$800.00 - 1,200.00.

China Sand Casting, China Resin ...

Dandong Foundry

https://www.iron-foundry.com › furan-resin-sand-castin...

Dandong Foundry

https://www.iron-foundry.com › furan-resin-sand-castin...

Dandong Foundry produces Gray Iron and Ductile Iron castings by furan resin sand casting process. ... Stove Burner | Cast Iron Plate | Manhole Cover | Brake Drum ...Read more

Round Manhole Cover

castingquality.com

https://castingquality.com › Manhole Cover Casting

castingquality.com

https://castingquality.com › Manhole Cover Casting

May 17, 2018 — Method: Sand Casting, Green Sand Casting , lost foam casting or Resin Sand Casitng. Material: Cast Ductile Iron, Cast Gray Iron. Standards: En124.Read more