What is perforated screen pipe
Aug 01, 2025
Perforated screen pipe is an industrial filter element made of mild steel. It achieves solid-liquid/gas separation by machining holes of specific shapes (such as round holes or slits) into the pipe wall. Its core features are as follows:
1.Structure and Manufacturing Process
Material Characteristics
The base material is mild steel coil (carbon content ≤ 0.25%), which is welded into the pipe body.
The surface is often galvanized to enhance rust resistance. Bare pipe can be used in non-corrosive environments.
Perforation process
| Process Type | Features | Applicable Scenarios |
|---|---|---|
| Punching and drilling | Mechanically punched round or bar holes, low cost but limited accuracy | Agricultural irrigation, coarse filtration systems |
| Laser cutting | Micron-level precision drilling, complex hole shapes can be customized | High-precision sand control (such as oil and gas wells) |
2. Core Functions and Performance Parameters
Filtration Mechanism
Pore size control intercepts solid particles (such as sand, gravel, and impurities) while allowing liquids or gases to pass through.
Porosity is typically 15%-30%, with slit structures capable of increasing this to 35%.
Mechanical Properties
Compressive Strength: 20-30 MPa (depending on pipe wall thickness);
Temperature Range: -20°C to 200°C (galvanized coating may fail above 60°C).
3. Application Scenarios and Limitations
| Industry |
Applications |
Advantages |
Disadvantages |
|---|---|---|---|
| Oil and gas extraction | Oil well sand control screens prevent formation sand from entering the oil production pipeline | Low cost and strong pressure resistance | Acidic environment is prone to corrosion and perforation |
| Water treatment | Sewage pretreatment, filter backwash | Simple structure, easy to replace | The gap is easy to clog and needs to be flushed regularly |
| Industrial Filtration | Chemical media coarse filtration, candle filter skeleton | The load-bearing capacity is better than that of plastic screen pipes | Not resistant to strong acid and alkali media |
