For a long time, due to the larger proportion of drainage cast iron pipe, and the installation of linen, modulation interface material, twisting, maintenance, construction not only heavy work, and installation time is very long, so that the construction benefit is significantly reduced. The proportion of PVC drainage pipe is about 1.4t/m3, only for cast iron pipe l / 5, the same length of plastic pipe is much lighter than cast iron pipe, installation only manual handling, and PVC drainage pipe is a socket type dissolving interface, at the same time, its standard length (6m, 4m) than cast iron pipe long, reduce the number of interfaces, reduce the installation process. For example: a standard 6m long DN110 plastic pipe only one person can be installed, and cast iron pipe is 2~3 people, so the installation time can be reduced by more than 60%, installation costs can also be reduced by more than 50%, for the construction unit, can save money, reduce costs, shorten the project cycle, but also improve the economy of the building.

2, good drainage performance

According to the gravity theory of the water film, when the flow area of the water film does not exceed 1/3~1/4 of the broken area of the riser, the large water drainage capacity of the plastic riser is 60% higher than that of the cast iron pipe, and it will not cause the damage of the water seal. Therefore, for the same equivalent displacement, the diameter of the PVC drain pipe can be smaller than that of the cast iron pipe. Or the same pipe diameter can be as far as possible within the scope of the specification permission to adopt a smaller slope, which can increase the net height of the space, more beneficial to users, enhance the use of the building function.

3, economic, beautiful

According to the current market situation, the price of PVC drainage pipe is only about 80% of cast iron drainage pipe, it is also said that the unit cost per thousand square meters of building area saving construction costs compared with the cost of cast iron drainage pipe reduced by about 700 yuan. In addition, because PVC pipe is lighter, its transportation costs are also significantly reduced.

PVC drainage pipe usually outer wall is white, and is not used as paint brush red lead, silver powder and other anti-corrosion treatment, there is no such as cast iron pipe outer wall corrosion and fall off and other problems, hidden into the pipe well does not need frequent maintenance care, open installation is more significant than cast iron pipe advantages: Easy to clean, less obstruction to visual effects, greatly improve people's living, working environment, but also convenient building property management.

4. Good social benefits

In our country, steel supply is increasingly scarce. PVC drainage pipe can widely replace other steel drainage pipes, and greatly reduce the energy consumption in the process of steel making, but also reduce the environmental pollution caused by this process. It has good social benefits.

5. Excellent physical and chemical properties

PVC pipe is thermoplastic products, heated by PVC into a molten state (150 ~ 200℃), containing about 56% of the unique flame retardant element chlorine (Cl), so the oxygen index is high, is a refractory material, stable chemical properties, unique mechanical and physical properties make it can be used normally for 50 years. At the same time, its anti-corrosion, anti-aging, wear resistance also make it more stable than drainage cast iron pipe, cement pipe can be used for a long time, thus reducing the frequency of replacement and maintenance, reduce the operating costs and natural loss of materials, conducive to the long-term use of buildings, but also increase the safety and reliability of building use.