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Filtration mesh and micron.
Mesh is a standard number specify approximately the number of apertures in 1 inch length of a screen.
the following table might help the irrigation field staff and irrigation systems planners to convert screen and disc filters mesh and micron definitions.
| 
 Size of filtration screen aperture. Conversion table for irrigation field staff.  | ||
| 
 Mesh  | 
 Aperture real size (micron)  | 
 Aperture nominal  | 
| 
 10  | 
 2000  | 
 2000  | 
| 
 12  | 
 1700  | 
 1680  | 
| 
 14  | 
 1400  | 
 1410  | 
| 
 16  | 
 1200  | 
 1190  | 
| 
 18  | 
 1000  | 
 1000  | 
| 
 20  | 
 850  | 
 840  | 
| 
 25  | 
 700  | 
 710  | 
| 
 30  | 
 600  | 
 590  | 
| 
 35  | 
 500  | 
 500  | 
| 
 40  | 
 400  | 
 420  | 
| 
 45  | 
 350  | 
 350  | 
| 
 50  | 
 300  | 
 300  | 
| 
 60  | 
 250  | 
 250  | 
| 
 70  | 
 200  | 
 210  | 
| 
 80  | 
 180  | 
 177  | 
| 
 100  | 
 150  | 
 149  | 
| 
 120  | 
 130  | 
 125  | 
| 
 140  | 
 100  | 
 105  | 
| 
 170  | 
 90  | 
 88  | 
| 
 200  | 
 75  | 
 74  | 
| 
 230  | 
 60  | 
 62  | 
| 
 270  | 
 50  | 
 53  | 
| 
 325  | 
 45  | 
 44  | 
| 
 
 
  | ||
 
Utility links:
Irrigation piping bsp and npt standarts
irrigation pe piping metric standarts