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PPR-AL-PPR pipe, three layers as the name, from size 20 to size63..this pipe is adjust from PPR-AL-PEX pipe, and the outer layer PPR is thicker than inner layer.
PPR-AL-PPR pipe imports the latest composite pipe technical from Germany. The pipe adds an aluminum alloy on the base of PP-R pipe, using macromolecule cement under a high temperature compound the PP-R pipe and aluminum. This pipe is the perfect union of metal and plastic pipe but has the hygienic, hermetic of plastic pipe, the rigidity of metal pipe, a much higher intensity, much more stable mechanical property at the same time. It also can prevent ultraviolet, the linear expansion ratio is 1/5 of the normal PP-R pipe which is close to the metal pipe, it possess much higher stability and safety.