>> Features
1.Optimization of long-term anti-aging performance•Using aerospace-grade unsaturated polyester resin + chopped glass fiber molding, the molecular structure compactness is increased by 60% compared with traditional materials. Tested by the National Chemical Building Materials Testing Center, it has been used continuously for 30 years without warping deformation under extreme temperature differences of -40 ° C to 120 ° C. The coefficient of thermal expansion is only 1/8 of that of metal products.
•The unique anti-hydrolysis formula effectively resists acid rain erosion, and the tensile strength retention rate is ≥ 95% in the corrosive environment of pH 3-11, which reduces the maintenance frequency by 90% compared with cast iron manhole covers.
•Passed the ASTM G154 accelerated aging test, the impact strength retention value after simulated natural aging for 20 years reached 88%, which was 3 times longer than that of ordinary composites.
2.Full spectrum protection system
•Innovative addition of nano-scale titanium dioxide (TiO _ 2) ultraviolet absorber to form a permanent light shielding layer, with a solar radiation tolerance value of 2000kLy and a UV-A/B band barrier rate of > 99.8%.
•Double composite protection process: the substrate is embedded with anti-UV masterbatch + surface nano-ceramic coating, the color fastness reaches the highest 5-level standard of GB/T250-2008, and the color difference Delta E < 1.5 after 5000 hours of xenon lamp aging test.
•Wide-area weathering performance: field verification in typical climate areas such as Lhasa (strong ultraviolet rays), Sanya (high temperature and humidity), Mohe (extreme cold), etc. The surface pulverization grade of the material remains level 0.
3.Intelligent load-bearing structure design
•The original honeycomb bionic reinforcement structure increases the load distribution efficiency by 40%, passing the EN124 standard D400 level test (40 tons load), and reducing the weight by 65% compared with the same size cast iron manhole cover.
•The embedded metal embedded parts are co-solidified with 316L stainless steel and the substrate, and the interfacial shear strength reaches 25MPa, which eliminates the bearing capacity attenuation caused by the corrosion of traditional bolts.
•Dynamic fatigue test: after 1 million 75kN cyclic loading, the residual deformation < 0.2mm, significantly better than the requirements of GB/T23858-2009.
CODE | LOAD | O | D | F | h | H | WEIGHT |
SS500A | A15 | 450x450 | 500x500 | 600x600 | 30 | 45 | 12.5 KG |
SS500B | B125 | 450x450 | 500x500 | 600x600 | 30 | 45 | 18.5 KG |
>> About The Company And Smc Manhole Cover
Qingdao Elite New Materials Co., Ltd. is a company specializing in the research, development, production, and sales of SMC Manhole Cover. Established in 2019, the company is committed to providing high-quality SMC composite products to the global market. Elite New Materials follows the principles of innovation and quality excellence in the production of SMC manhole covers, using advanced production equipment and technology. The products comply with both domestic and international standards and are widely used in urban construction, road maintenance, park facilities, and other sectors.
The company’s products are exported to the United States, Australia, Germany, the United Kingdom, India, South Africa, and many other countries, and are highly praised by international customers. Our manhole cover series includes standard products in various specifications and load ratings, and we also offer custom solutions based on specific customer needs.
If you are interested in our SMC Manhole Cover, feel free to contact us for consultation or orders. We will provide you with the best products and services and look forward to cooperating with you to advance infrastructure construction.
>> Delivery & Shipping
Fast, On-Time Delivery
We ensure timely delivery, with standard products shipped in 30 days and customized orders given an estimated lead time after confirmation.
Global, Reliable Shipping
We work with top logistics partners to deliver your products safely worldwide. You can track your order every step of the way.
>> Customer Cases & Reviews
Trusted by Global Leaders
Our composite manhole covers are used in major infrastructure projects worldwide. Here’s what our customers say:
"Under the high temperature of 50 ° C and strong ultraviolet environment, the SMC manhole cover has no deformation and cracking phenomenon, and its thermal stability far exceeds the local standard, successfully replacing the original American supplier's products."
— Middle Eastern Clients (Dubai Municipal Council)
“The electromagnetic insulation characteristic completely eliminates the risk of electric shock in the track area. It has passed the SGS conductivity test (resistance value > 1×10^12 Ω) and has become a mandatory specification for rail transit projects.”
— South East Asia Customers (Singapore Metro Group)
>> Environmental Responsibility & Social Responsibility
Sustainable & Eco-Friendly
We reduce environmental impact by using eco-friendly SMC/BMC materials, ensuring minimal carbon emissions throughout the product lifecycle.
Committed to Social Good
We support educational projects and environmental initiatives, striving to make a positive impact on society.
>> Features
1.Optimization of long-term anti-aging performance•Using aerospace-grade unsaturated polyester resin + chopped glass fiber molding, the molecular structure compactness is increased by 60% compared with traditional materials. Tested by the National Chemical Building Materials Testing Center, it has been used continuously for 30 years without warping deformation under extreme temperature differences of -40 ° C to 120 ° C. The coefficient of thermal expansion is only 1/8 of that of metal products.
•The unique anti-hydrolysis formula effectively resists acid rain erosion, and the tensile strength retention rate is ≥ 95% in the corrosive environment of pH 3-11, which reduces the maintenance frequency by 90% compared with cast iron manhole covers.
•Passed the ASTM G154 accelerated aging test, the impact strength retention value after simulated natural aging for 20 years reached 88%, which was 3 times longer than that of ordinary composites.
2.Full spectrum protection system
•Innovative addition of nano-scale titanium dioxide (TiO _ 2) ultraviolet absorber to form a permanent light shielding layer, with a solar radiation tolerance value of 2000kLy and a UV-A/B band barrier rate of > 99.8%.
•Double composite protection process: the substrate is embedded with anti-UV masterbatch + surface nano-ceramic coating, the color fastness reaches the highest 5-level standard of GB/T250-2008, and the color difference Delta E < 1.5 after 5000 hours of xenon lamp aging test.
•Wide-area weathering performance: field verification in typical climate areas such as Lhasa (strong ultraviolet rays), Sanya (high temperature and humidity), Mohe (extreme cold), etc. The surface pulverization grade of the material remains level 0.
3.Intelligent load-bearing structure design
•The original honeycomb bionic reinforcement structure increases the load distribution efficiency by 40%, passing the EN124 standard D400 level test (40 tons load), and reducing the weight by 65% compared with the same size cast iron manhole cover.
•The embedded metal embedded parts are co-solidified with 316L stainless steel and the substrate, and the interfacial shear strength reaches 25MPa, which eliminates the bearing capacity attenuation caused by the corrosion of traditional bolts.
•Dynamic fatigue test: after 1 million 75kN cyclic loading, the residual deformation < 0.2mm, significantly better than the requirements of GB/T23858-2009.
CODE | LOAD | O | D | F | h | H | WEIGHT |
SS500A | A15 | 450x450 | 500x500 | 600x600 | 30 | 45 | 12.5 KG |
SS500B | B125 | 450x450 | 500x500 | 600x600 | 30 | 45 | 18.5 KG |
>> About The Company And Smc Manhole Cover
Qingdao Elite New Materials Co., Ltd. is a company specializing in the research, development, production, and sales of SMC Manhole Cover. Established in 2019, the company is committed to providing high-quality SMC composite products to the global market. Elite New Materials follows the principles of innovation and quality excellence in the production of SMC manhole covers, using advanced production equipment and technology. The products comply with both domestic and international standards and are widely used in urban construction, road maintenance, park facilities, and other sectors.
The company’s products are exported to the United States, Australia, Germany, the United Kingdom, India, South Africa, and many other countries, and are highly praised by international customers. Our manhole cover series includes standard products in various specifications and load ratings, and we also offer custom solutions based on specific customer needs.
If you are interested in our SMC Manhole Cover, feel free to contact us for consultation or orders. We will provide you with the best products and services and look forward to cooperating with you to advance infrastructure construction.
>> Delivery & Shipping
Fast, On-Time Delivery
We ensure timely delivery, with standard products shipped in 30 days and customized orders given an estimated lead time after confirmation.
Global, Reliable Shipping
We work with top logistics partners to deliver your products safely worldwide. You can track your order every step of the way.
>> Customer Cases & Reviews
Trusted by Global Leaders
Our composite manhole covers are used in major infrastructure projects worldwide. Here’s what our customers say:
"Under the high temperature of 50 ° C and strong ultraviolet environment, the SMC manhole cover has no deformation and cracking phenomenon, and its thermal stability far exceeds the local standard, successfully replacing the original American supplier's products."
— Middle Eastern Clients (Dubai Municipal Council)
“The electromagnetic insulation characteristic completely eliminates the risk of electric shock in the track area. It has passed the SGS conductivity test (resistance value > 1×10^12 Ω) and has become a mandatory specification for rail transit projects.”
— South East Asia Customers (Singapore Metro Group)
>> Environmental Responsibility & Social Responsibility
Sustainable & Eco-Friendly
We reduce environmental impact by using eco-friendly SMC/BMC materials, ensuring minimal carbon emissions throughout the product lifecycle.
Committed to Social Good
We support educational projects and environmental initiatives, striving to make a positive impact on society.
