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Perforated aluminum barrier for reinforced PPR pipe Specifications： Layer product: Polypropylene, QF551. 2. Application: PPR pipes. 3. EN575/EN546. This kind of pipeline has a framework of five layers: the inner as well as outer layers are made of PP-R, which are tightly adhered with PP-based adhesive to the mid-layer of light weight aluminum, which is weII joined through welding. Significantly reduced linear expansion coefficient, just 1/4 of that of simple PP- R pipelines. Enhanced resistant to impulse under low temperature, resistant to UV-ray. Can work under higher temperature level as well as higher stress. Wuhan King Plastic Composite Material Co.,Ltd. Wuhan King Plastic Composite Material Co.,Ltd is located in Wuhan city, Hubei Province. It produces on an area for 20000 square meters since its establishment date of 2005.