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Drain-waste-vent system refers to the collection, transportation, water quality treatment, and discharge facilities of sewage, wastewater, and drainage, which are combined in a certain way. It mainly treats and discharges urban sewage and rainwater, and is a component of urban public facilities.
Definition
Drain-waste-vent system planning is a component of overall urban planning, usually composed of drainage pipes and sewage treatment plants. Drainage systems can be divided into combined drainage systems and separate drainage systems. In the combined system, domestic sewage and rainwater enter the combined pipe together, while the separate system is a system that discharges domestic sewage, industrial wastewater, and rainwater in two or more independent pipes.
What is the role of the drain-waste-vent system?
1. Treatment and discharge of sewage: Collect domestic sewage through indoor and outdoor sewage pipe systems and transport it to sewage treatment plants for treatment. After the treated water meets the discharge standards, it can be discharged into receiving water bodies such as rivers or lakes through the outlet and accident outlet. This process not only purifies the water quality but also reduces water pollution and protects the ecological environment.
2. Rainwater drainage: The drainage system can cope with all kinds of rainy weather, especially in rainy seasons, to avoid floods. Rainwater runoff is collected through drainage pipes and discharged into the nearest water body to clear the groundwater quickly, avoid damage to the ground, and bring convenience to people’s travel.
3. Environmental protection: Through effective treatment and discharge of sewage, reduce environmental pollution caused by direct discharge of sewage, protect water resources, and maintain ecological balance. At the same time, it reduces the slipping of vehicles and pedestrians caused by slippery ground, extends the service life of the ground and various buildings, and saves manpower and material resources.
4. Provide urban infrastructure support: The planning and construction of the Drain-waste-vent system is part of the overall urban planning, which is directly related to the quality of life of urban residents. A good Drain-waste-vent system can bring clean and tidy ground, bring a pleasant mood to people’s travel, and reduce the discomfort of traveling after rain.
Common pipe materials for drain-waste-vent system
Common materials for drain-waste-vent systems include polyvinyl chloride (PVC) pipes, polyethylene (PE) pipes, steel pipes, cement pipes, silicate cement pipes, cast iron pipes, PP HDPE ultra-quiet drain pipes, etc.
1. PVC Drainage Pipes are widely used because of their corrosion resistance, lightness, low cost, and smooth inner wall. It has good resistance to acid and alkali corrosion and is suitable for drain-waste-vent systems.
2. HDPE Drainage Pipe is favored because of its good flexibility, strong impact resistance and low-temperature resistance. It has good toughness and impact resistance and is suitable for use in complex environments, but its pressure-bearing capacity is relatively weak and aging may occur after long-term use.
3. Steel pipes, including galvanized steel pipes and stainless steel pipes, are used because of their high strength and wide range of applications. Steel pipes have high tensile strength and can withstand large external pressure and impact, but are susceptible to corrosion and require regular maintenance.
4. Cement pipes and silicate cement pipes are used for their fire resistance, strong pressure-bearing capacity, and long life. Cement pipes can last for more than 50 years, but they are heavy and difficult to construct and transport.
5. Cast iron pipes are widely used for their high strength, high-temperature resistance and excellent corrosion resistance. Cast iron pipes are fast to install, have good fire resistance, strong earthquake resistance, and have a long service life.
6. PP HDPE ultra-silent drain pipe is a new type of drainage pipe with good quiet performance, chemical corrosion resistance, and heat resistance, suitable for occasions where low noise drainage is required.
When choosing the right Drain-waste-vent system material, it is necessary to consider the specific requirements of the place of use, such as whether it needs high-temperature resistance, corrosion resistance, low noise, etc., as well as factors such as cost and construction difficulty. Each material has its own unique advantages and disadvantages, so it is crucial to choose the material that best suits a specific application scenario.
