近年来经济迅猛发展,人们的生活水平、环保意识不断提高,传统的铸铁排水管材因为不能满足现代环保要求,已逐渐被淘汰。随着石油化工的飞速发展,石油深加工技术日趋完善,诞生了各种塑料排水管材,UPVC管材经济环保,资源来源 In recent years, the economy has developed rapidly. People’s living standards and environmental awareness have been continuously improved. Traditional cast iron drainage pipes have gradually been eliminated because they cannot meet modern environmental protection requirements. With the rapid development of petrochemical industry, the deep-processing technology of petroleum has been increasingly perfected, and various plastic drainage pipes have been born. UPVC pipes are economical and environmental protection, and the source of resources