Aluminum Pex Pipe

Description

pex ordinary high-density polyethylene (HDPE and MDPE) pipes, its macromolecules are linear knots, the biggest disadvantage is poor heat resistance and creep resistance, so ordinary high-density polyethylene pipes are not suitable for conveying temperatures greater than 45°C Medium. "Crosslinking" is an important method of polyethylene modification. After crosslinking, the linear macromolecular structure of polyethylene becomes PEX with a three-dimensional network structure, which greatly improves the heat resistance and resistance of polyethylene. Creep ability, and its aging resistance, mechanical properties and transparency have been significantly improved. The higher the degree of crosslinking, the more obvious the improvement of these properties. At the same time, it inherits the inherent chemical resistance and flexibility of polyethylene pipes. There are three commercial PEX tubes. PEXa pipe PEXb pipe PEXC pipe. Aluminum-plastic composite pipe is the first water supply pipe to replace cast iron pipe. Its basic structure should be five layers, namely plastic, hot melt adhesive, aluminum alloy, hot melt adhesive, and plastic from the inside to the outside. The plastic part adopts cross-linked polyethylene (PEX), the intermolecular structure is more stable and firmer, and it is more suitable for building water supply and heating systems.

Information

Feature

PEX AL PEX pipe has good thermal insulation performance, the inner and outer walls are not easy to corrode, because the inner wall is smooth, the resistance to fluid is small; and because it can be bent at will, it is convenient to install and construct. As a water supply pipe, the aluminum-plastic composite pipe has sufficient strength. If the lateral force is too large, the strength will be affected. Therefore, it should be constructed with exposed pipes or buried in the wall, or even buried in the ground. (Aluminum-plastic composite pipes can also be buried in the ground. For example, the pipes used in floor heating are aluminum-plastic composite pipes). Through strict pressure test, check whether the connection is firm. The second is to prevent frequent vibration and loosen the ferrule. The third is to leave enough installation amount in the length direction to avoid pulling off.

Application

Plastic pipes used for indoor cold and hot water supply have their own advantages and disadvantages. The only unique advantage of aluminum-plastic composite pipes is that they can block the penetration of gas. The heating system) is beneficial because it can prevent the infiltration of oxygen to avoid oxidation and corrosion in the system. Other plastic pipes can also be used in several ways to make up for their poor oxygen barrier properties, so they can also be used in closed-loop hot water systems. In addition to the above five types of plastic pipes, plastic-lined steel pipes and fittings, and plastic-coated steel pipes and fittings, plastic-clad copper pipes, plastic-lined aluminum pipes, etc., they can also be used in the field of indoor cold and hot water supply. These plastic-lined or plastic-coated metal pipes also have their own unique advantages and disadvantages. For example, plastic-lined or plastic-coated steel pipes are based on galvanized steel pipes, and the reliability of their mechanical properties is most easily trusted by users. Therefore, the above-mentioned various pipes are actually being used in the field of indoor cold and hot water supply at home and abroad, and they are constantly improved and developed.

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