2017 Shanghai quality technical inspection institution inspected tube production made from co-polypropylene(PP-R). the inspection in accordance with GB/T 18742.2 polypropylene tube system for cool and hot water, Part 2: tube, and relative standards. test terms: size and specification(average outer diameter and deviation of wall thickness), longitudinal retraction rate, impact test with simply supported beam, static hydraulic compression test at 20℃ for 1h, static hydraulic compresson test at 95℃ for 22h. hygiene property(consumption of lead, cadmium and potassium permanganate). this inspection inspect 20 groups of production of Shanghai, 20 groups is qualified, qualified percent of pass is 100%.