Corrugated hose fittings as a flexible pressure pipe installed in the liquid delivery system, to compensate for pipe or machinery, equipment, mutual displacement connectors, absorb vibration energy, can play a vibration, noise and other effects, has excellent flexibility, quality Light, corrosion resistance, fatigue resistance, high temperature and many other features. Two types of plastic hose fittings, a totally airtight, watertight, such as rocket propellant for the transport, gas, water heater; the other is used with a continuous winding material, the common winding of corrugated pipe used for protection of cables, such as magnetic card telephones, machine tools, while the lamp of corrugated pipe is in the production process into the wire clip.
Plastic composite pipe is the first alternative to cast iron pipe water supply pipe, its basic structure should be five, that is, from the inside were plastic, hot melt adhesive, aluminum alloy, hot melt adhesive, plastic. Aluminum plastic composite hose fittings has good insulation properties, corrosion inside and outside the wall is not easy, due to inner smooth, fluid resistance is small; it as free to bend, so installation is easy for construction. As the water supply hose fittings, aluminum plastic composite hose fittings of sufficient strength, but if too much lateral force, it will affect the strength, so should be out or buried in the wall pipe construction, but should not be buried underground.
Aluminum-plastic composite pipe can be buried underground, such as to warm the pipes used one is the plastic composite pipe) aluminum plastic composite pipe connection is ring-style (can also be compression type), so construction First, we must pass a stringent test pressure, test the connection is solid. Second, to prevent frequent vibration, so that card set loose. Third, the length of the installed capacity should remain sufficient to avoid pull off. Application of plastic composite pipe. In water supply and heating pipes with thermoplastic pipes instead of the traditional domestic hot galvanized steel hose fittings is the current trend.
Industrial sector according to market demand, develop the introduction of plastic pipes of various materials, one of which can be used for hot and cold water and hot water heating, building high-density polyethylene (HDPE) and aluminum composite hose fittings, that is, plastic composite (PE -AL-PE) pipes. Aluminum plastic composite hose fittings in China developed rapidly, about 85 domestic aluminum pipe production line, annual production capacity of 150 million m, construction of aluminum tubes are investing enthusiasm. To this end the author information in accordance with relevant domestic and international research conducted on the plastic composite pipe integrated domestic situation and development trend of making an objective evaluation, provide for reference.
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