Aluminum alloy pipe should be said that the composite pipe is the most ideal pipe diameter ≥ 300mm above the drainage pipe. It has both metal pipe strength, good rigidity and non-metallic pipe corrosion resistance advantages. But it is a slow development of a pipe. This is because:
1, the combination of two kinds of pipe together than a single pipe price is high.
2, the difference between the coefficient of thermal expansion of the two materials, such as bonding is not strong and the ambient temperature and medium temperature change is more drastic, easy to disengage, resulting in a decline in quality. Composite pipe connection is suitable for cold processing, hot processing is easy to cause the lining of plastic expansion, deformation and even melting. There are generally threaded, ferrules, clamps and other connection methods.