Wire Diameter & Open Area Guide
In precision woven industrial wire mesh, wire diameter (d) and aperture width (w) directly govern open area ratio (Ao), dictating the critical engineering trade-off between mechanical strength, pressure drop, and volumetric throughput.
Wire diameter (d) is the nominal circular cross-sectional thickness of raw warp and weft wires prior to or within the woven fabric. During the weaving process, bending and interlocking at intersections create micro-flattening (crimp), requiring standardized measurement techniques.
- •Ball-Point Micrometer: Measures straight unknitted wire sections, avoiding distortion from weave knuckles.
- •Optical Projection Profile: Non-contact calibrated digital projection for fine meshes (≤0.10 mm) preventing deformation.
- •Laser Diffraction Scanning: Continuous in-line laser monitoring ensuring batch tolerance consistency down to ±0.002 mm.
Open area (Ao) represents the proportion of geometric net apertures relative to the total envelope area of the screen mesh. It is the fundamental factor in determining volumetric throughput and initial differential pressure (ΔP).
Note: For Dutch weave (twilled/plain Dutch cloth), adjacent wires are pressed together with near-zero line-of-sight open area; filtration rating is characterized via bubble point pore sizing rather than projection Ao.
Heavy / Thicker Wire
High RigidityRecommended for high differential pressure surges, abrasive slurries, heavy vibrating screens, and sintered mesh support backings.
Light / Thinner Wire
High PermeabilityIdeal for gravity separators, air/intake filters, viscous liquid de-dusting, and pleated filter elements requiring maximum free area.
4. Standard Mesh Open Area Reference Table
Calibrated to ASTM E2016 plain-weave square mesh using exact formula Ao = (w / (w + d))² × 100
| Mesh Count | Wire Dia. d (mm) | Aperture w (mm) | Aperture (µm) | Open Area Ao (%) | Weight (~kg/m²) | Primary Application |
|---|---|---|---|---|---|---|
| 10 # | 0.500 | 2.040 | 2040 | 64.5% | 1.25 | Heavy aggregate scalping, coarse protective baskets |
| 20 # | 0.400 | 0.870 | 870 | 46.9% | 1.60 | Fluidized bed support, petrochemical strainers |
| 50 # | 0.200 | 0.308 | 308 | 36.8% | 1.00 | Water intake clarification, sand separation |
| 100 # | 0.100 | 0.154 | 154 | 36.8% | 0.50 | Polymer extrusion screen packs, fuel line straining |
| 200 # | 0.050 | 0.077 | 77 | 36.8% | 0.25 | Pharmaceutical powder classification, hydraulic oil |
| 325 # | 0.035 | 0.043 | 43 | 30.5% | 0.20 | Ultra-fine chemical slurries, high-purity gas filters |
MutualFilter supplies precision stainless steel 304, 316L, 904L, and Hastelloy wire meshes. Custom wire gauges and calendered weaves are engineered to match target pressure drops. Certified MTR and QA inspection reports accompany every shipment.
Request a custom quote referencing wire diameter and open area requirements
Submit your required wire diameter, mesh count, aperture size, open area ratio, and alloy grade. Our technical engineers provide certified datasheets and tiered production pricing within 24 hours.