In urban drainage systems, construction projects and industrial park construction, large-diameter PVC drainage pipes are the key pipes to maintain the smooth flow of water - they are corrosion-resistant, lightweight, easy to construct, and can adapt to a variety of complex environments. But different calibers of PVC pipes correspond to different drainage needs, and choosing the right size can make the system "easy to use and not wasteful". Today we will focus on the three commonly used large-diameter pipes of 300, 400, and 500, and talk about their application scenarios.

First look at the 300-caliber PVC pipe. Its flow is moderate, suitable for medium-scale drainage needs. For example, roof drainage of multi-story or small high-rise (within 10 floors) buildings: When the rainwater from the roof is collected through the gutter during a rainstorm, the 300-caliber can be drained quickly, which will not cause water accumulation on the roof due to the small pipe diameter, and will not waste pipes. Stormwater branches in small residential areas (about 200 households) and auxiliary drainage pipe networks in industrial parks (such as local production wastewater discharge in workshops) are also commonly used in 300 caliber - this type of scenario has a small displacement, but requires stable drainage capacity, and 300 caliber is the most cost-effective.

and 400 caliber. PVC pipes of this size have a larger flow rate, corresponding to the drainage needs of the upper medium. Stormwater branches (two-way and two-lane branches) on municipal roads are a typical scenario: after the rainwater is collected through the rainwater mouth of the roadside stone, the 400 caliber branch pipe can transport the water to the main pipe, which can handle daily rainfall or short-term rainstorms. The main drainage pipe network of medium-sized residential areas (about 500 households) is also commonly used 400 caliber - the rainwater and domestic sewage of each building are collected into the main pipe, and the 400 caliber can carry the total displacement of the entire community. There are also underground garage drainage in commercial complexes: the underground garage area is large, and it is easy to accumulate water during heavy rains. The 400 caliber PVC pipe can quickly discharge the injected rainwater to avoid the garage being flooded.

Finally, the 500 caliber PVC drain pipe is the "main force" in the large flow scene. The rainwater trunk pipe of the main road in the city (more than four lanes in both directions) must use 500 caliber: the main road catchment area is large, and the amount of rainwater is amazing during heavy rains. The 500 caliber can quickly transport rainwater to the urban drainage system to avoid waterlogging on the road surface. The main drainage pipe of a large industrial park (which houses thousands of enterprises) cannot be separated from the 500 caliber - the production wastewater and rainwater of the enterprises in the park need to be discharged centrally, and the main pipe must have sufficient bearing capacity. In addition, the inlet pipe of the urban sewage treatment plant is also commonly used 500 caliber, because to receive sewage from multiple regions, the large diameter can ensure the stable flow of water and does not affect the treatment efficiency.

Of course, the selection cannot only depend on the caliber, but also depends on the actual situation: for example, calculate the displacement according to the catchment area and rainfall intensity to ensure that the pipe diameter matches; consider the terrain slope (the slope can be suitable for small diameter, and the slope is small, the large diameter needs to ensure the flow rate); at the same time, it must comply with the "Building Water Supply and Drainage Design Standard" and other specifications. Choosing the right large-diameter PVC pipe can not only ensure smooth drainage, but also reduce later maintenance costs - using the wrong diameter will either lead to hidden dangers of water accumulation, or waste pipes and construction costs.

In short, 300, 400, and 500 caliber PVC drainage pipes have their own uses: 300 caliber is suitable for small and medium-sized scenarios, 400 caliber corresponds to medium-sized projects, and 500 caliber is the first choice for large-scale projects. Choose according to the displacement and catchment area of the scene to make the drainage system truly "durable and worry-free".