bmc manhole cover / manhole cover lock

Beijing Sanqun Manhole Covers Factory is a manufacturer specialized in the research, development and production of manhole covers. We are located in Beijing,and a branch factory in shenzhen Province, with convenient transportation access. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world. The products are the high-strength W-SMC manhole cover and water grates researched and developed by the company in 2002.The products are produced through forming a high-density whole by high-temperature moulding with high-strength W-SMC sheet moulding plastics, being the base material.The products are shaped like iron plates with a hard texture,and have made up for the defect of BMC reinforced products for inconformity with testing load. The load of the products have met the requirements of GB/T23858-2009 standard through verification by the state authentic departments with its maximum load reaching 900KN.At present,the products have been widely used in inspection wells of power,telecommunication,mobile communication,fuel gas pipes and chemical bases etc., and real estates,urban arteries,high-grade highways,expressways,freight transport piers and airports