Double Hinge And Double Closing Ductile Iron Manhole Cover

Production information:

Durable and Quality Materials: Our 850x850 D400 double hinged, double closing square manhole cover is made of durable ductile iron and cast iron materials, ensuring long-lasting performance and reliability in a variety of applications.
Compliant with International Standards: This product complies with ISO 9001:2008 certification standards, guaranteeing its quality and safety for use in construction, pavement, streets, gardens, sewage and drainage projects.
Customizable Sizes: We offer custom sizes to meet specific user requirements, ensuring a perfect fit for your building or infrastructure project.
Multi-Process Manufacturing: Our manhole covers undergo a thorough process including casting, machining, surface treatment and inspection to ensure a high-quality finish and precise dimensions.
Various Surface Treatments: The product is available with different surface treatments such as asphalt coating, painting, shot blasting, polishing to suit the needs and preferences of various projects.

Production Description:

Advantages

The Ductile Cast iron Manhole covers which are produced by our company with below advantages:

------Security.prevent the cover being stolen

------No noise

------High load-bearing

------Corrosion resistance

------Safety

Manufacturing Process

Material Preparation: High-quality pig iron and scrap iron are melted together, with magnesium added to create a ductile iron alloy.

Casting: The molten iron is poured into molds to form the basic shape of the manhole cover. Sand casting is a common method due to its precision and efficiency.

Heat Treatment: The cast pieces are treated with heat to improve strength and flexibility.

Surface Coating: Anti-corrosive coatings are applied to ensure longevity in various environments.

Quality Control: Each cover undergoes rigorous testing for load-bearing capacity, tensile strength, and dimensional accuracy.

Company Information:

SND has been producing and selling metal goods for about 20 years.By using manufacturing techniques including sand casting, lost wax casting, lost foam casting, and precision machining, the company has been supplying goods made of materials like cast iron, steel, stainless steel, aluminum, etc. Additionally offered are surface finishing and assembly services.

Our company has successfully created products in a variety of industries, including automotive, rail transportation, agricultural machinery, chemical, energy, electricity, water, air compressor, and construction, thanks to our consistent efforts over the past few years.

Our factories' ISO9001-accredited quality control systems guarantee a consistent and dependable quality for each and every component.
Spectrometer, ultrasonic, magnetic, permeability, elongation, tensile/yield strength, and other inspections are carried out as part of routine production procedures.