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Why choose composite material for manhole cover?

Author:Site Editor     Publish Time: 2021-01-05      Origin:Site

What is composite material?

The composite material is a new type of material that is composed of several types of different materials, such as organic polymers, inorganic non-metals or metals, through a composite process. It can not only retain the main characteristics of the original composition material, and obtain the performance that the original composition does not have through the compound effect. The performance of each component can be complemented and related to each other through design, so as to obtain new superior performance, which is essentially different from the simple mixing of general materials.

As can be seen from the definition of composite materials, the essential difference between simple mixing of general materials and composite materials is mainly reflected in two aspects: 

First, composite materials not only retain the characteristics of the original constituent materials but also complement each other through the performance of each component And correlation can obtain new superior performance that the original component does not have.

The second is the designability of composite materials, such as structural composite materials not only can be designed according to the force requirements of the material in use but more importantly It can also carry out composite structure design, that is, the design of the proportion, distribution, arrangement and orientation of the reinforcement. Structural composite materials, it is composed of a reinforcement component that can bear the load and a matrix component that can connect the reinforcement as a whole and play a role in transmitting force.

SMC (sheet molding compound) is suitable for molding various parts from small to large, from flat plates to very complex shapes. Can provide the possibility of continuous stranding or matt SMC (sheet molding compound) has a variety of colors and usually can be color matching SMC (sheet molding compound) has excellent physical, heat-resistant, flame-retardant and chemical resistance.


Composite manhole cover material composition

  • The composite manhole cover belongs to the inorganic synthetic composite manhole cover, which is made of a new type of high-strength inorganic synthetic material and glass fiber composite. It is a medium-to-high grade manhole cover product. Resin fiberglass composite manhole cover is also called fiberglass manhole cover, plastic manhole cover. Non-metallic materials will not rust.

  • The inside of the composite manhole cover is reinforced by mesh steel bars, and the key force-bearing part is specially strengthened. When an inevitable external impact occurs, the pressure can be quickly dispersed to ensure the safety of people and vehicles. Shockproof.

  • The glass fiber material can be composite reinforced materials such as resin and does not contain metal components. However, it has the same or even higher toughness and strength. After long-term use, the product will not be crushed or damaged, and it can completely prevent the occurrence of "urban black hole" accidents. And it is not conducive yet.

  • The weight of the composite manhole cover is much smaller than that of the cast iron manhole cover. It only contains reticulated steel bars inside, and the content is small, and because the manhole cover is extremely strong, it is difficult for thieves to damage the manhole cover to take out the few steel bars. Therefore, the composite manhole cover does not have much theft value. Due to the lightness of the composite material, the composite manhole cover is more convenient to use. It is easy to transport, install and repair. The labor intensity and cost of transportation, installation and construction are greatly reduced.

  • The composite manhole cover has high compressive, flexural, and impact-resistant strength, and has a long service life. durable. Through scientific formula, advanced technology and perfect technical equipment, the manhole cover enables the product to be used normally in the environment of -50℃~+300℃. And it has the advantages of corrosion resistance and can adapt to special corrosive environments.

  • High-cost performance, beautiful appearance. Patterns can be designed on the surface, and the colors are bright and diverse and adjustable. It can be equipped with a locking structure according to customer needs to realize the anti-theft of property in the well.

Why we choose composite materials to make manhole covers

  • The composite manhole cover has a zero scrap value, which eliminates the theft of the manhole cover.

  • Cast iron manholes and metal manhole covers are stolen every day. The thieves steal the cast iron manhole cover and let vehicles, people, or animals fall into the hole.

  • Composite manhole covers provide a quick, easy and affordable method to prevent manhole covers from being stolen. FRP manhole covers or composite manhole covers have no waste value.

  • The weight reduction of composite manhole covers means that the probability of worker injury is reduced. The composite manhole cover is lighter and easier to handle and place in practical engineering.

  • Cast iron manhole covers usually weigh between 100 and 200+ pounds. The weight reduction of composite manhole covers and glass fiber manhole covers can reach more than 60%.

  • We consider the convenience and safety of customers and pedestrians from all aspects of production, installation and use. Starting from the realization of all aspects of functional convenience, composite materials are the well-deserved first choice for manhole cover materials. Solve many functional and long-term problems of the manhole cover at one time.

Composite manhole covers are also ideal for special environments

The composite manhole cover can easily resist the corrosive environment. Sewers and sewage systems can be highly corrosive. Hydrogen sulfide is corrosive, toxic, heavier than air, flammable, and even explosive. When dissolved in water, it becomes a weak acid called hydrosulfuric acid or sulfurous acid. When heat and humidity are combined with a long retention time, ideal conditions for microbial induced corrosion are created. This corrosion can eventually damage most of the sewer infrastructure, but the composite manhole cover is not affected. Composite manhole covers and frames are ideal for corrosive settings found in municipal collection systems, sewers and industrial pretreatment applications.

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Its main products include composite manhole covers, water meter, power and gas industry meter boxes , Drainage grate, customized composite products and SMC materials.
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Contact us


If you would like to have a question then get in touch today, we are ready to assist 24/7. We welcome your cooperation and we will develop with you.

 Factory-direct Connectivity Solutions.
 High quality, Competitive Price.
 Custom-tailored solutions.
 Problem-solving approach.

Contact us


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