Galvanized steel pipes are divided into cold galvanized steel pipes and hot galvanized steel pipes. Cold galvanized steel pipes have been banned, and the latter has been advocated by the state for temporary use. In the 1960s and 1970s, developed countries began to develop new types of pipes, and have banned galvanized pipes. China's Ministry of Construction and other four ministries and commissions also issued a document explicitly banning galvanized pipes as water supply pipes from 2000. Galvanized pipes are rarely used in cold water pipes of new residential areas, and some residential hot water pipes use galvanized pipes. Hot dip galvanized steel pipe has a wide range of applications in fire, electric power and highway.