Composite Manhole Covers

Polymer Manhole Covers: 1. Environmental Protection: High-performance modification of SMC sheet materials and all raw materials meet the requirements of environmental protection. It doesn't pollute the environment; 2. Save mineral resources: For iron ore resources in the increasingly tense domestic situation, we developed a high performance modified SMC sheet material instead of the traditional cast iron manhole cover which saves iron ore resources; 3. Anti-corrosion: The product is high-performance SMC sheet material, which is anti-corrosion of acid, alkali, salt and rust-proof. It can be fit in a variety of harsh environmental conditions and adapt to a wide temperature range of -50 ° To 150° 4. If polymer manhole cover and cast iron manhole cover in the case of same performance, the price of polymer cover is only two thirds of cast iron manhole cover; 5. The weight of polymer manhole cover is only about two-thirds of cast iron, and it is easy to transport, install, repair and convenient to construct, which greatly reduces the labor intensity; 6. For the special properties of modified SMC sheet material: The product is of convertibility, good outlook, strong color, rich color change; Use of color rather than spraying the whole material, the color lasting, smooth surface of the product, feel smooth, delicate and coordinating with the color of surrounding floor and flooring material, maintain, beautiful and practical; 7. Security: Once the material formed, it has no recycling value. Natural security, virtually eliminating the theft, which makes up the cast iron manhole cover cause frequent security incidents; We also have developed our own unique locking system to secure the equipments and facilities inside of the cover for this product. Eradicate "urban black hole" accident; It brings great convenience for the municipal and public sector management; 8. Low noise: This product is made of non-metallic materials and there is no harsh sound of metal crash when the car rolls; Greatly reduces noise pollution. 9. Long service life: Tested by the State Construction Engineering Quality Supervision and Inspection Center, the product can withstand 2 million cycles of fatigue test and the service life can reach more than three decades! It is the best alternative of cast iron manhole cover.        To ensure the normal use of composite manhole cover, there should be pay attention to installation quality, be sure that the size is correct, installation is solid, easy to open, clean and nice appearance. According to the technology standard of composite manhole cover, the installation is made as follows: 1. The construction of brick work should be designed according to the requirements of design institute and ensure that the inner diameter (length and width or diameter) is accurate. 2. When installing the collar on concrete roads, there should pouring a 20cm thick concrete ring beam and a 40cm width guard circle around it between the collar and brick setting to mak the surrounding compaction, level and unmoveable. The maintenance period should above 10 days. 3. When installing the collar on bituminous road must avoid a roller compaction by construction equipment. The collar must be installed after paving asphalt. A hole which is slightly larger than the collar should be reserved before the pavement casting. The reserved hole can help ensure the installation quality and prolong its using life. 4. For keeping a nice appearance, there should put a cover or brush with oil on lid to protect it from stained during asphalt pavement construction. Using plastic film cover the lid to protect the cement during cement road construction. And the lid should be cleaned after construction the same day. 5. Timely open and clean up the lid to avoid the lid integrate with collar after road paved. 6. The lid should be installed on corresponding roads according to different load capacity.