At present, many provinces and cities such as Jiangsu, Zhejiang, Jiangxi, Anhui, Fujian, Chongqing, Hubei, Hunan, Henan, Gansu, Guangxi, Guangdong, Shandong, Hebei, Shaanxi, Sichuan, Guizhou, Yunnan, Shanxi, Inner Mongolia, Jilin, Liaoning, Heilongjiang, Ningxia, Qinghai and other provinces and cities have replaced cast iron manhole covers with resin manhole covers. High quality, excellent fatigue resistance, breakage safety, simple molding, low rolling noise, good resistance to chemical corrosion, good acid and alkali resistance, and beautiful appearance. Its comprehensive performance and economic indicators have surpassed that of cast iron manhole covers, and it can also solve the problem of cast iron manhole covers being stolen. At the same time, it can also reduce resource consumption and has important economic and social value. According to the requirements of the Ministry of Construction's "Project Plan for the Development and Revision of Industrial Product Standards of the Ministry of Construction in 1998", the "Recycled Resin Composite Material Inspection Manhole Cover" standard compiled by a company in Heilongjiang Province was reviewed and approved as an industry standard. It shall be implemented from the date of year, month and year.
Chenhang composite manhole cover, resin manhole cover