Article Introduction
Storm water drainage systems are crucial in the prevention of flooding. They are underground to collect and convey rainwater from a roof to the nearest waterway, typically a sewer system. They help to divert excess rain and groundwater which runs off impervious surfaces such as parking lots, roofs, paved streets, and sidewalks into nearby waterways through a system of drains and underground pipes.
Stormwater system designs range from simple residential drainage to complex municipal drainage and are constructed using different pipe materials. The best pipe material for a project depends on the type of system being designed, the depth of installation, and the loads placed on the pipe.
By reading the following article, you can know how to correctly choose PVC rainwater pipes!
Considerations for selecting rainwater pipes
When selecting rainwater drainage pipes, several key considerations should be taken into account to ensure the pipes meet the actual drainage needs and ensure long-term performance. Here are the main considerations:
1. Material Quality
PVC Resin Purity: High-quality rainwater drainage pipes should be made of high-purity PVC resin, which guarantees good corrosion resistance and aging resistance.
Impurity and Defect Inspection: Check the pipe for any obvious color unevenness or impurity particles, as these may affect its physical and chemical properties.
2. Size and Specification
Diameter and Wall Thickness: Select pipes with appropriate diameters and wall thicknesses based on the actual drainage requirements. Larger diameters and adequate wall thicknesses may be needed to handle higher water pressures or flows.
Length: Standard lengths are usually 4m or 6m, but custom lengths can be ordered.
Common Specifications: Common PVC drainage pipe specifications include nominal outer diameters of 32mm, 40mm, 50mm, 75mm, 90mm, 110mm, 160mm, among others.
3. Drainage Performance
Flow Efficiency: The inner wall of the pipe should be smooth to minimize water resistance and enhance drainage efficiency.
Hydraulic Performance: Different manufacturers may produce pipes with varying degrees of inner wall roughness, so choose pipes with as smooth an inner wall as possible.
4. Environmental Adaptability
Temperature Resistance: Consider the temperature range in which the pipes will operate. PVC pipes have limited temperature resistance and may soften at high temperatures or become brittle at low temperatures.
UV Resistance: For pipes installed outdoors, choose materials with better UV resistance to prevent molecular structure damage.
5. Strength and Durability
Mechanical Strength: Ensure the pipes have sufficient compressive strength, especially in underground drainage or scenarios where they may be subjected to external pressures.
Corrosion Resistance and Aging: Consider the pipe’s resistance to aging, especially under UV exposure and chemical erosion.
6. Installation and Cost
Ease of Installation: PVC pipe and fittings are lightweight and easy to handle and install. Consider the convenience of the connection method, such as glue connection or rubber ring seal connection.
Cost-Effectiveness: Compare prices from different brands and manufacturers, taking into account quality and lifespan.
By carefully considering these factors, you can select rainwater drainage pipes that meet your specific needs and ensure efficient and reliable drainage systems.
Rainwater drainage pipe selection
Rainwater drainage can usually use PVC-U pipes or PVC-M pipes. The following is a detailed explanation of these two pipes:
PVC-U pipe:
Advantages: PVC-U pipes (unplasticized polyvinyl chloride pipes) have excellent physical properties and chemical stability, are resistant to chemical corrosion, and can resist the erosion of chemicals such as acids and alkalis. They are suitable for use in sewage and wastewater discharge systems, including rainwater drainage. Its inner wall is smooth and has low flow resistance, which can significantly improve drainage efficiency. In addition, PVC-U pipes are light and durable, easy to install, and are conducive to speeding up project progress and saving construction costs.
Specifications: The length of PVC-U pipes is generally 4m or 6m, and other lengths are determined by negotiation between the supply and demand parties. The nominal outer diameters of commonly used PVC-U pipe drainage pipes are 32mm, 40mm, 50mm, 75mm, 90mm, 110mm, 160mm and other specifications, which are suitable for the needs of different scenarios.
PVC-M pipe:
Advantages: PVC-M pipe (modified polyvinyl chloride pipe) is based on PVC-U pipe, and its molecular structure is changed by physical or chemical methods to improve its impact resistance and pressure resistance. Therefore, PVC-M pipe has higher impact resistance and pressure resistance, can withstand greater external pressure and impact, and is particularly suitable for drainage environments that need to withstand greater water pressure or complex and changeable conditions.
Application: Due to these excellent properties of PVC-M pipe, it is also widely used in rainwater drainage systems to ensure the safety and durability of the drainage system.
When choosing PVC pipes, in addition to considering the type and specifications of the pipes, it is also necessary to pay attention to factors such as the quality of the pipes, the connection method, and the construction and installation to ensure the normal operation and long-term stability of the drainage system.
Conclusion
It is generally recommended to use UPVC (rigid polyvinyl chloride) pipes for rainwater drainage systems. This type of pipe has strong corrosion resistance, aging resistance and good mechanical properties, and is suitable for long-term exposure to rainwater environments. UPVC pipes are also low in weight, easy to install, and relatively economical in price.
Usually according to actual needs, UPVC pipes with UV resistance and antifreeze properties can also be selected to ensure their long-term use under different climatic conditions.
In addition, pay attention to the connection and sealing of the pipes during installation to prevent leakage and water accumulation. If there is a large flow of drainage demand, it is recommended to select the appropriate pipe diameter according to the drainage volume.
If you would like to purchase or learn more about PVC pipes and fittings, please contact our team. The team will assist you and help you solve all your problems!
About SAM-UK
SAM-UK are a professional 18+ years manufacturer in producing vinyl building profile products and PVC , CPVC , PPH , PPR , PP pipes and pipe fittings, valves, taps and so on. We own the certificates of SGS\SONCAP\ISO9001\CE\NSF，support color /size customization. Welcome to consult for Catalog and Product. you can contact us at email sales@sam-uk.com
