Woven Wire Mesh Guide | WireMeshQA

Woven Wire Mesh: Weaves, Specs & Uses

Quick answer

Woven wire mesh is made by interlacing warp and weft wires on a loom, producing precise, repeatable openings that make it the standard choice for filtration, sieving, screening and architectural applications.

By the WireMeshQA editorial team · Independent wire mesh reference

What is woven wire mesh?

Woven wire mesh is manufactured like fabric: warp wires run lengthwise and weft (shute) wires are interlaced across them on a weaving loom. This produces accurate, consistent apertures and lets manufacturers achieve far finer openings than welding allows. It is specified by mesh count (wires or openings per linear inch), wire diameter and the resulting aperture.

Common weave types

Weave	Description	Typical use
Plain weave	Each warp and weft wire passes alternately over and under, equal wire diameters	General filtration, sieving, guards
Twill weave	Each wire passes over and under two adjacent wires; allows heavier wire at a given count	Heavier-duty filtration, finer counts
Plain Dutch weave	Thicker warp, finer weft woven tightly; openings are not square	Fine fluid/gas filtration
Twill Dutch weave	Dutch weave with a twill pattern for very fine filtration	Micron-rated filtration, hydraulics

Mesh count, opening and wire diameter

Mesh count alone does not define the opening - you also need the wire diameter. The aperture equals the pitch (25.4 mm divided by mesh count) minus the wire diameter. The table shows representative plain-weave values; learn the maths in mesh count to opening size.

Mesh count (per inch)	Typical wire dia. (mm)	Approx. opening (mm)
10	0.55	1.99
20	0.40	0.87
40	0.25	0.40
100	0.10	0.15
200	0.05	0.077

Materials

SS304: the most common stainless grade - good corrosion resistance, formability and value for general filtration and sieving.
SS316 / 316L: adds molybdenum for resistance to chlorides and aggressive chemicals; chosen for marine, food and pharmaceutical work - see SS304 vs SS316.
Brass and bronze: used for non-sparking, decorative or specialist filtration needs.
Galvanised mild steel: economical for coarser industrial screening where corrosion is less critical - see galvanised vs stainless.

Where woven mesh is used

Filtration - liquid, gas, oil, fuel and hydraulic filters.
Screening and sieving - test sieves, grading and particle separation.
Architectural - facades, balustrades, ceilings and decorative panels.
Safety and process - machine guards, insect screens and diffusers.

How to choose and buy woven mesh

Decide the opening size you need first, then select a mesh count and wire diameter that deliver it with adequate open area and strength. For filtration, match the aperture to the smallest particle you must retain. Pick the material for the fluid and environment. Use the spec converter to move between count, opening and wire diameter, and read the buying guide.

Tip

Two meshes can share the same mesh count but have very different openings - always confirm the wire diameter, not just the count.

Frequently asked questions

What is mesh count in woven wire mesh?

Mesh count is the number of openings (or wires) per linear inch, measured from the centre of one wire to a point one inch away. A higher count means smaller openings. Count alone does not fix the aperture, because a thicker wire reduces the open space; you must also know the wire diameter.

What is the difference between plain weave and Dutch weave?

Plain weave uses equal warp and weft wires with square openings, suited to general filtration and sieving. Dutch weave uses a coarser warp and a much finer, tightly packed weft, giving narrow non-square openings for very fine, micron-rated fluid and gas filtration with higher strength.

Should I choose SS304 or SS316 woven mesh?

SS304 suits most general filtration and sieving and offers good value. Choose SS316 or 316L where chlorides or aggressive chemicals are present, such as marine, coastal, food, pharmaceutical or seawater applications, because its added molybdenum resists pitting and corrosion better than SS304.

How do I convert mesh count to opening size?

Divide 25.4 mm by the mesh count to get the pitch, then subtract the wire diameter to get the aperture. For example, 40 mesh with 0.25 mm wire gives a 0.40 mm opening. Our spec converter and the mesh-count-to-opening guide do this automatically for any count and wire size.

What is the finest woven wire mesh available?

Standard square woven mesh reaches roughly 400 to 500 mesh (around 25 to 30 micron openings). For finer separation, twill Dutch weave and sintered multi-layer mesh achieve filtration ratings down to a few microns. See our filter screen page for micron-rated options and how ratings are defined.

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