PVC pipe pressure concept
1. Nominal pressure: This is the maximum working pressure of the pipe when conveying water, and it is also the pressure of normal printing on the surface of the pipe. The nominal pressure stipulates different levels such as 0.63Mpa, 0.8Mpa, and 1.0Mpa to ensure the safe operation of the pipeline.
2. Working pressure: It refers to the maximum continuous water pressure acting on the inner wall of the pipe under normal working conditions, excluding water hammer pressure. This is the pressure that the pipe needs to withstand in actual use.
3. Water hammer pressure: The instantaneous fluctuating pressure generated in the operation of the pipeline system due to the sudden change in the flow rate of water. This is the additional pressure caused by the change in the flow state of water in the pipeline system.
4. Design pressure: The maximum instantaneous pressure acting on the inner wall of the pipe during the operation of the pipeline system is the sum of the continuous working pressure of the pipeline and the water hammer pressure. This is the maximum pressure that needs to be considered when designing and installing the pipeline.
How to choose PVC pressure pipe?
1. Temperature influence: As the temperature of the medium increases, the working pressure will decrease. Therefore, when selecting a water supply pipeline, it is necessary to consider a sufficient pressure safety factor, especially under high-temperature conditions.
2. Diameter and pressure level: PVC water supply pipes of different pressure levels have different minimum diameter requirements. For example, the minimum diameter of 0.6Mpa pipes is 63mm, while the minimum diameter of 1.0Mpa pipes is 40mm. This means that when selecting pipes, it is necessary to determine the appropriate diameter and pressure level based on the specific pressure requirements and flow requirements.
3. The difference between PN and DN: In the technical characteristics of PVC Pipes for Water, PN indicates the pressure level that the pipe withstands, while DN indicates the nominal diameter of the pipe. For example, DN25 PN10 means that the nominal diameter of this pipe is 25mm and the pressure level is 1.0Mpa. This shows that when selecting pipes, it is necessary to clarify the required diameter and pressure level to ensure the correct configuration of the pipeline system.
PVC pressure pipe dimensions
The dimensions of PVC pressure pipe dimensions are as follows:
Diameter: Common diameters are 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 200mm, 250mm, 315mm, etc.
Wall thickness: The wall thickness of PVC pipes is usually between 1.5mm and 4.0mm. The thicker the wall, the stronger the bearing capacity of the pipe, but the cost will also increase accordingly.
Length: The length of PVC pipes is generally 4 meters or 6 meters, and there are also some special specifications for pipes with a length of 3 meters or 5 meters. The choice of length should be determined according to the specific use occasion and needs.
The specifications of PVC pressure pipes include not only diameter and wall thickness but also the provisions of nominal pressure. The nominal pressure is stipulated as 0.63Mpa, 0.8Mpa, 1.0Mpa, 1.25Mpa, 1.6Mpa and other 5 types. The minimum diameter of the pipe in each pressure zone is specified as follows: the minimum diameter of the 0.63Mpa pipe is 63mm, the minimum diameter of the 0.8Mpa pipe is 50mm, the minimum diameter of the 1.0Mpa pipe is 40mm, the minimum diameter of the 1.25Mpa pipe is 32mm, and the minimum diameter of the 1.6Mpa pipe is 20mm and 25mm.
Advantages
1. Excellent pressure resistance: PVC pressure pipe has excellent pressure resistance and can withstand a high-pressure environment without deformation or rupture, ensuring the safe operation and durability of the pipeline system.
2. Strong corrosion resistance: PVC material has good chemical stability and can resist the erosion of various acid and alkali solutions. It will not corrode and rust due to long-term use, effectively extending the service life of the pipeline.
3. Lightweight and high strength: Compared with traditional metal pipes, PVC pressure pipes are lighter, easier to transport and install, and have high ring stiffness, which can withstand greater external pressure and ensure the stable operation of the pipeline system.
4. Environmental protection and health: PVC pressure pipe materials are safe and reliable, will not pollute water quality, and are suitable for the transportation of drinking water.
Application areas
1. Construction field: In the construction field, PVC pressure pipes are mainly used in water supply, drainage, fire protection, floor heating, and other systems. Its lightweight, high strength, corrosion resistance, easy installation, and other characteristics make PVC pressure pipes increasingly widely used in the construction field.
2. Municipal field: In the municipal field, PVC pressure pipes are mainly used in urban water supply, drainage, sewage treatment, and other systems. Its corrosion resistance, wear resistance, and long life give PVC pressure pipes significant advantages in municipal engineering.
3. Agricultural field: In the agricultural field, PVC pressure pipes are mainly used in farmland irrigation, greenhouse irrigation, aquaculture, and other scenes. Its excellent weather resistance and corrosion resistance make PVC pressure pipes have a long service life in the agricultural field.
4. Industrial field: In the industrial field, PVC pressure pipes are mainly used for pipelines in chemical, electric power, pharmaceutical, and other industries. Its excellent corrosion resistance, high temperature resistance, and pressure resistance make PVC pressure pipe have a wide range of application prospects in industrial production.
