Quality inspection station said that the ceiling does not let go PVC tube, I did not find evidence
Because the rigid plastic pipe material is fragile and high temperature is easy to deformation, it should not be laid in the high temperature and easy to suffer mechanical damage." Should not be laid in high temperature and mechanical damage. There are many of the original process standards, there are also related content, PVC is not allowed in the ceiling laying, according to the estimate is also the provisions of the people's regulations, but more strict. The wind pipe belongs to the metal equipment in the building. According to the concept of equipotential bonding, it should be done with equipotential connection.
The new regulations do not make regulations, but only stipulates that rigid plastic pipe (trough) has a strong acid and alkali corrosion resistance, and moisture resistance is good, should be given priority in wet and acid, caustic corrosion sites.
In the regulations of the old people's regulations, the "hard burning type" plastic pipe wiring can be used in the building ceiling." Plastic bellows should not be used".
