Sewage pipes commonly used cast iron drainage pipe or rigid PVC pipe ; When the diameter is less than 50 , can be steel ; sewage pipes can be buried clay pipe with glaze .
1 , cast iron drainage pipe pipe corrosion resistance strong , straight pipe length is generally 1.0 ~ 1.5m. Their connection to socket connections, common interface material interfaces ordinary cement , asbestos- cement interface, the expansive cement interface. In high-rise buildings , there are areas of the building seismic requirements drains should be flexible interface . Elimination of sand casting cast iron pipes for indoor drains , in line with the promotion of UPVC and ” flexible interface cast iron drainage pipes and fittings ” (GB/T12772-1999) cast iron pipes , flexible interface mechanism .
2 , hard PVC plastic pipe tube (UPVC), polypropylene tube (PP), polybutylene pipe (PB) pipe and plastic (ABS)
Plastic drain pipe connection methods: adhesive , rubber ring connections, threaded connections.
The application of plastic pipe drainage should be noted:
1 , the continuous water discharge temperature of not more than 40 ℃, the instantaneous discharge temperature is less than 60 ℃.
2 , by the water temperature and the ambient temperature changes caused by expansion and contraction of the length , in order to eliminate the influence of the pipe expansion produced by temperature reduction , expansion joints provided a method usually used .
Post time: Apr-25-2019