Drainage plastic pipes are being used in the context of efforts to replace ordinary drainage cast iron pipes. At present, drainage plastic pipe can be used in the building height of 100m below the building, but the progress of each region is very uneven. When the building height is greater than, equal to 100m of high-rise buildings and not suitable for the use of drainage plastic pipe occasions, flexible seismic drainage cast iron pipe can be used.

Drainage plastic pipe there are some problems:

1, small stiffness, poor straightness, need to encrypt the pipe card, bracket, hanger to solve the problem

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2, poor flame retardant, in the floor through the roof, roof panels, firewalls, pipe well walls need to be set at the fire ring and fire casing to solve.

3、Large coefficient of thermal expansion, need to set up expansion compensation device to solve.

4, poor mechanical impact resistance, need to strengthen the construction technology, careful construction to solve.

5, poor heat resistance, low softening temperature, need to limit the drainage temperature, limit the use of places and control the distance from the heat source to solve.

6, poor acoustic insulation, plastic pipe noise is greater than cast iron pipe, pipeline installation and pipeline location near the bedroom, the problem is particularly prominent. Noise reduction ways to improve the sound insulation effect of the pipe material, core layer foam pipe air wall pipe is developed based on this idea; noise reduction is another way to change the conditions of water flow, the idea of combining the two ways is the development of core layer foam spiral pipe and air wall spiral pipe.