Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes. A layer of plastic anti-corrosion layer or plastic anti-corrosion layer is fused to the inner surface of the steel pipe (bottom pipe) through spraying, showering, dipping, suction and other processes. Steel-plastic composite steel pipe with plastic anti-corrosion layer melted on the inner and outer surfaces.
Galvanized steel pipes are divided into cold-dip galvanized steel pipes and hot-dip galvanized steel pipes. Cold-dip galvanized steel pipes have been banned, and the state advocates the temporary use of the latter. In the 1960s and 1970s, developed countries in the world began to develop new pipes and gradually banned galvanized pipes. Four ministries and commissions including the Ministry of Construction of my country also issued a document clarifying that the use of galvanized pipes as water supply pipes will be prohibited from 2000. Galvanized pipes are rarely used in cold water pipes in newly built communities and hot water pipes in some communities. Use galvanized pipe. Hot-dip galvanized steel pipes are widely used in fire protection, electric power, highways and other fields.
