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1) It is strictly prohibited to throw, drop, roll or drag pp fitting in the process of handling;

2) PPR pipes and pipe fittings shall be stored in warehouse and simple shed, and the stacking height shall not exceed 1.5m.

3) In the process of construction, it is necessary to:

① The hardness and rigidity of PPR pipe are lower than that of metal pipe, so it should be protected during handling and construction to avoid mechanical damage caused by improper external force. After concealed laying, the position of pipeline shall be marked to avoid damage of pipeline by secondary decoration.

② There is a certain low temperature brittleness below 10 ℃ of PPR pipe. Be careful in winter construction. Use sharp knife to cut pipe slowly. The installed pipes shall not be pressed or knocked, and the vulnerable parts shall be covered with protective objects if necessary.

③ Before hot-melt connection of PPR pipes and pipe fittings, carefully check whether the pipes have been damaged. Especially the inner wall, because when the pipe is under external force, the inner wall first breaks and then goes out. Avoid using pipes whose inner wall has been broken but whose outer pipe has not been broken.

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