PEX tubing are used for cold water (with temperatures up to +20 ° C), and for hot water (with temperatures up to +70 ° C), as well as radiant heating systems, fire extinguishing systems, air conditioning and floor heating device. For a system of cold water applied to the non-reinforced PEX tubing 10, 16 and 20 bar with an outside diameter of 16 mm to 110 mm (tube of 10 bar – from 20 to 250 mm). The use of fiberglass reinforced PEX tubing for cold PEX plumbing is economically inexpedient.
For hot water are used as non-reinforced PEX tubing of 16 and 20 atm, and fiberglass-reinforced PEX tubing of 20 atm.
When choosing PEX tubing for a specific project must be borne in mind that the coefficient of thermal expansion of non-reinforced PEX tubing is 13 times higher than steel, for reinforced aluminum composite pipes that figure is comparable to steel, which often reduces the number of expansion joints, or abandon them altogether. Furthermore, compared with unreinforced PEX tubing, reinforced PEX piping have a thin wall, which makes it possible to use smaller diameter while maintaining capacity.
PEX tubing are supplied rods to 4 m and should have all the necessary certificates – correspondence and hygienic. There are over 400 types of PEX fittings (including external and internal thread to go to the metal) and valves for PEX tubing, which significantly facilitates the installation work.
Due to the special properties of the material, PEX tubing and PEX fittings are extremely resistant to chemical, thermal stability and high toughness, which ensures long and trouble-free operation. For PEX plumbing there is a special table on which is determined by the lifetime of PEX tubing, depending on the temperature and pressure of flowing medium.
