1, Ji'nan galvanized pipe lined plastic pipe, this pipe material can be applied to the cold and hot water supply system. Lined plastic steel pipes lined with PVC-U and PE shall not be used for hot water system.
2, when the pipe is lined with plastic pipes, the working pressure of the system should not exceed 1.0MPa.
3. When the working pressure of the pipe system is greater than 1.0MPa and not more than 1.6MPa, the lining plastic pipe should adopt the coated (lining) plastic seamless steel tube, seamless steel tube piece or ductile iron coating (lining) plastic pipe, flange connection or groove connection.
4. When the working pressure of the pipe system is greater than 1.6MPa and less than 2.5MPa, the lining plastic pipe should adopt the seamless steel tube coated (lining) and the seamless steel tube or the cast steel coated (lining) plastic pipe. Use flanges or grooves.
5, when the pipe diameter of the lined plastic pipe is less than 100mm, thread connection should be used. When the pipe diameter is larger than 100mm, flange or grooved connection should be adopted. The pipe of the pump room should be connected with the flange.
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