Floor heating pipe refers to a kind of pipe used as the carrier of low-temperature hot water circulation in the low-temperature hot water floor radiant heating system (referred to as floor heating).
Domestic production generally adopts the method of cross-linking medium-density polyethylene or high-density polyethylene with silane or peroxide cross-linking. It is the chemical bond connection between the linear long molecular chains of polyethylene to form a three-dimensional network molecular chain structure. Compared with general polyethylene, it has improved tensile strength, heat resistance, aging resistance, stress crack resistance and dimensional stability. The entire production process is a chemical reaction process. This kind of floor heating has difficulties such as the crosslinking agent is not easy to disperse uniformly, the degree of crosslinking is difficult to control and the screw needs to be cleaned regularly to prevent the generation of gel particles. The quality control of the product is difficult, and it is difficult for ordinary small manufacturers to do well. Qualified PE-X pipe has the advantages of good mechanical properties, high temperature resistance and low temperature performance. However, PE-X pipes have no thermoplastic properties and cannot be connected and repaired by hot-melt welding.
Known as the soft gold in plastics, it has superior creep resistance and mechanical properties. It is the softest among several floor heating pipes, and the designed and calculated wall thickness is the thinnest under the same design pressure. Under the same conditions of use and the same wall thickness series of pipes, this variety has the highest safety in use. However, the price of raw materials is the highest, more than double that of other varieties, and the current domestic application area is small. The market will gradually popularize this kind of pipe in the future.
