In foreign countries, plastic pipe is constantly replacing metal or other traditional materials pipe, the development is very rapid. In addition to the plastic pipe in the decade from 1980 to 1990, the total pipe growth rate of other materials was less than 2%, but the growth rate of the plastic pipe was four times the sum of the growth rate of the other pipes, reaching 8% , The demand for plastic pipes entering the 1990s still grow at an annual rate of 4.2%, and its output is increasing at an annual rate of 8%.
China since the seventies began to produce plastic pipe, the early eighties began to promote the use of construction projects. Over the past two decades, plastic pipe has been a great development, not only in quantity, but also in the variety and specifications have been greatly developed. By the end of 1999, the national plastic pipe production line about more than 2,000, of which about 15% of the introduction of equipment. 1999 China’s various plastic pipe production capacity has reached 1.65 million tons, the actual output of about 1 million tons. Among them, PVC-U tube 500,000 tons, accounting for 50%; PE pipe 36 million tons, accounting for 36%. In recent years, with the construction industry as an important pillar industry of the national economy and the rapid development of housing industry, the construction of indoor plastic pipe developed rapidly, has now become a hot investment today.