PE pipe is mainly made of polyethylene material. From its chemical structure, polyethylene molecules have a high proportion of carbon and hydrogen. This structure makes PE pipe easy to burn when it encounters a fire source. When PE pipe comes into contact with an open flame, the flame will spread rapidly, and it will continue to release heat during the combustion process, which will promote the combustion to intensify. In some fire accident cases, PE pipe without special treatment will not only burn quickly when the fire occurs, but also become an "accomplice" of the fire spread, posing a serious threat to personnel safety and property. Therefore, in the past, PE pipe was limited in application in scenes with high fire protection requirements due to insufficient flame retardancy.