API Standards
The American Petroleum Institute (API) Screen Designation is the customary identification for screen panels. This includes:
- API Number: the sieve equivalent as per API RP 13C
- Conductance: the ease with which a liquid can flow through the screen, with larger values representing higher volume handling
- Microns: a unit of length equal to one-thousandth of a millimeter
- Non-blanked area: an evaluation of the surface area available for liquid transmission through the screen
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—Andrea Dworkin (b. 1946)