Nowadays, the industry is developing very fast, new and old products are updated very fast, and the rate at which new products replace old ones is getting faster and faster. In the selection of drainage pipes for many projects, the more common cast iron drain pipes were used in the 1980s and 1990s, but now more are PVC drainage pipes, and cast iron drain pipes are eliminated, then PVC drain pipes are opposite to cast iron pipes. What are the advantages?

The first point: good drainage performance, according to the theory of water film gravity, the maximum water-passing capacity of the plastic riser when the drainage water film flows through the flow area does not exceed 1/3~1/4 of the broken pipe area. It is 60% more than cast iron pipe, and it will not cause damage to 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 used as far as possible within the scope of the specification. The smaller slope, which can increase the net height of the space, is more advantageous for the user and enhances the use function of the building.

The second point: the pipe is light and the construction is convenient. For a long time, the drainage cast iron pipe has a large specific gravity, and it needs to be hemp, adjust the interface material, gargle and maintain during installation. It not only has heavy work during construction, but also has a long installation time. Construction benefits are significantly reduced. The PVC drainage pipe has a specific gravity of about 1.4t/m3, which is only l/5 of the cast iron pipe. The plastic pipe of the same length is much lighter than the cast iron pipe. It only needs to be manually handled during installation, and the PVC drain pipe is The socket type viscous interface, at the same time, its standard length (6m, 4m) is longer than cast iron pipe, reducing the number of interfaces and reducing the installation process. For example, a standard 6m long DN110 plastic tube can be installed by one person, while a cast iron tube requires 2~3 people, so the installation time can be reduced by more than 60%, and the installation cost can be reduced by more than 50%. The construction unit can save costs, reduce costs, shorten the engineering cycle, and improve the economics of the building.

The third point: economic and beautiful, according to the current market conditions, the price of PVC drainage pipe is only about 80% of the cast iron drain pipe, that is to say, the construction cost per 1,000 square meters of the construction cost per unit square is lower than that of the cast iron drain pipe. About 700 yuan. In addition, because PVC pipes are lighter, their transportation costs are also significantly reduced. PVC drainage pipe usually has white outer wall and is not used for anti-corrosion treatment such as red paint and silver powder. There is no problem such as rust corrosion of the outer wall of cast iron pipe. It does not need frequent maintenance and care when it is darkly inserted into the pipe well. The advantages of the tube are more significant: easy to clean, less obstructive to visual effects, greatly improving people's lives, working environment, and convenient property management of buildings.

The fourth point: good social benefits, in today's steel supply shortage in China, PVC drainage pipes can replace other steel drainage pipes in a wide range, and greatly reduce the energy consumption in the steelmaking process, and at the same time reduce the price. Environmental pollution caused. Has good social benefits.

The fifth point: superior physical and chemical properties, PVC pipe is a thermoplastic product, heated by PVC into a molten state (150 ~ 200 ° C), containing about 56% of the unique flame retardant element chlorine (Cl), so the oxygen index is high, it is difficult Combustible material, chemically stable, unique mechanical and physical properties enable it to be used normally for 50 years, and its corrosion resistance, anti-aging and wear resistance make it more stable and durable than cast iron pipe and cement pipe. This reduces the frequency of replacement repairs, reduces operating costs and the natural loss of materials, facilitates long-term use of buildings, and increases the safety and reliability of building use.