PVC irrigation pipe, also known as PVC irrigation pipe, full name of low pressure irrigation rigid polyvinyl chloride (PVC-U) pipe, is made of PVC resin powder as the main raw material, with appropriate additives added, processed and formed through mixing, extrusion, sizing, cutting and expanding processes.
PVC irrigation pipes are mainly used to transport water from water sources to fields. Due to the relatively low irrigation pressure (0.25-0.63MPa), they are called low-pressure irrigation pipes.
1、 What are the characteristics of PVC irrigation pipes?
The characteristics of PVC low-pressure irrigation pipes are generally similar to common PVC water supply and drainage pipes, and can be summarized as follows:
Smooth inner wall
Smooth inner wall, low water flow resistance, reduced head loss, increased water transport capacity by about 20% compared to cast iron pipes and about 40% compared to concrete pipes;
● Good toughness and high strength
High tensile strength, good mechanical properties, high hardness, and strong wear resistance;
● Corrosion resistance
Capable of resisting chemical erosion such as acid, alkali, salt, etc., suitable for various soil and water quality conditions;
● Lightweight and easy to install
Lightweight, easy to transport, with a specific gravity of about 1/5 of steel cast iron pipes and 1/2 of concrete, saving transportation costs;
● Precise irrigation
Accurate irrigation can be carried out based on crop growth and soil moisture to avoid water resource waste;
Low cost
The raw materials and production costs are relatively low, economical, and suitable for large-scale use.
2、 What are the specifications and pressures of PVC irrigation pipes?
According to the national standard, the pressure of PVC irrigation pipes is divided into five types: 0.25MPa, 0.32MPa, 0.4MPa, 0.5MPa, and 0.63MPa. The pressure bearing capacity is relatively small, which is also the main difference between PVC irrigation pipes and PVC water supply and drainage pipes.
Due to different uses, PVC drainage pipes generally do not involve the concept of pressure magnitude; PVC water supply pipes have higher pressure requirements, ranging from 0.63MPa to 2.5Mpa
The specific specifications, wall thickness, and pressure are shown in the following table:
Special attention:
According to the above figure, according to the national standard, the specification of PVC low-pressure irrigation pipes starts from dn75 (in addition, PVC drainage pipes generally start from dn32, and PVC water supply pipes start from dn20)
3、 What are the implementation standards for PVC irrigation pipes?
GB/T 13664-2023 "PVC-U pipes for low-pressure irrigation"
4、 How to connect PVC irrigation pipes?
Adhesive connection (flat expansion)
Expand one end of the pipe to a smooth socket, and connect it to the other end by applying glue and inserting it.
● Socket type rubber ring connection (R expansion port)
Expand one end of the pipe into an R-shaped socket with a circular sealing groove, insert the other end, and form a seal by tightly contacting the sealing groove to ensure the firmness and sealing of the pipe connection
5、 What are the application areas of PVC irrigation pipes?
● Agricultural irrigation:
Suitable for irrigation of farmland, orchards, and vegetables, especially for irrigation of field crops such as wheat, corn, rice, etc. in flat and gentle slopes;
Horticulture and landscape irrigation:
An irrigation system suitable for horticultural planting such as flowers, lawns, and nurseries.
Greenhouse irrigation:
Suitable for irrigation of flowers, vegetables, seedlings, etc. in greenhouses.
● Water saving irrigation project:
PVC low-pressure irrigation pipes play an important role in water-saving irrigation projects in areas with scarce water resources.
Irrigation in animal husbandry:
Suitable for irrigation needs in animal husbandry production such as grasslands and feed bases.
That's all for the introduction of PVC low-pressure irrigation pipes, including their characteristics, specifications, pressure, connection methods, application scope, etc. It's quite comprehensive. Some people also say that PVC irrigation pipes are non-standard PVC water supply pipes with lower pressure and inferior materials, which seems to be the same thing.