Mesh (scale) explained

Mesh (scale) should not be confused with Mesh generation.

Mesh is a measurement of particle size often used in determining the particle-size distribution of a granular material. For example, a sample from a truckload of peanuts may be placed atop a mesh with 5 mm openings. When the mesh is shaken, small broken pieces and dust pass through the mesh while whole peanuts are retained on the mesh. A commercial peanut buyer might use a test like this to determine if a batch of peanuts has too many broken pieces. This type of test is common in some industries, and, to facilitate uniform testing methods, several standardized mesh series have been established.

Metal surfaces mechanically polished are designated as having a mechanical finish related to the abrasive used.

Many mesh sizes were historically given in the number of holes per inch; due to the width of the wires in the mesh, mesh numbers did not correspond directly to fractional inch sizes, and several different systems standardized with slightly different mesh sizes for the same mesh numbers.

Commercial dimensions

Opening! colspan="2"
Standard MeshTensile Bolting ClothMill GradeMarket Grade
(mm) (in) (μm) US Tyler Mesh Opening Wire Mesh Opening Wire Mesh Opening Wire
5.60 0.225600 3.5
4.75 0.187 4750 4
4.00 0.157 4000 5
3.35 0.132 3350 6
2.80 0.110 2800 7
2.36 0.093 2360 8
2.00 0.079 2000 10
1.70 0.0661 1700 12 10 14 0.062 0.009 12 0.065 0.018 12 0.0603 0.023
1.40 0.0555 1400 14 12 16 0.0535 0.009 14 0.054 0.017 14 0.051 0.0204
1.18 0.0469 1180 16 14 18 0.0466 0.009 16 0.0465 0.016 16 0.0445 0.0181
1.00 0.0394 1000 18 16 22 0.0380 0.0075 18 0.0406 0.015 18 0.0386 0.0173
0.85 0.0331 850 20 20 24 0.0342 0.0075 20 0.0360 0.014 20 0.034 0.0162
0.71 0.0278 710 25 24 28 0.0282 0.0075 24 0.0287 0.013 24 0.0277 0.014
0.60 0.0232 600 30 28 34 0.0229 0.0065 30 0.0238 0.0095
0.50 0.0197 500 35 32 38 0.0198 0.0065 34 0.0204 0.009 30 0.0203 0.0128
0.47 470 40 0.0185 0.0065 36 0.0188 0.009
0.465 465 42 0.0183 0.0055 38 0.0178 0.0085
0.437 437 44 0.0172 0.0055 35 0.0176 0.0118
0.425 0.0165 425 40 35 46 0.0162 0.0055 40 0.0165 0.0085
0.389 389 48 0.0153 0.0055 40 0.0150 0.0104
0.368 368 50 0.0145 0.0055
0.355 0.0139 355 45 42 52 0.0137 0.0055 45 0.0142 0.008
0.310 310 60 0.0122 0.0045 50 0.0125 0.0075
0.300 0.0117 300 50 48 62 0.0116 0.0045 55 0.0112 0.007
0.282 282 64 0.0111 0.0045 50 0.0110 0.0090
0.270 270 70 0.0106 0.0037
0.260 260 72 0.0102 0.0037
0.250 0.0098 250 60 60 74 0.0098 0.0037 60 0.0102 0.0065
0.241 241 76 0.0095 0.0037
0.231 78 0.0091 0.0037 60 0.0092 0.0075
0.212 0.0083 212 70 65 84 0.0084 0.0035
0.193 90 0.0076 0.0035
0.180 0.0070 180 80 80 94 0.0071 0.0035 80 0.0070 0.0055
0.165 105 0.0065 0.0030
0.150 0.0059 150 100 100 120 0.0058 0.0025 100 0.0055 0.0045
0.125 0.0049 125 120 115 145 0.0047 0.0022 120 0.0046 0.0037
0.105 0.0041 105 140 150 165 0.0042 0.0019 150 0.0041 0.0026
0.090 0.0035 90 170 170 200 0.0034 0.0016 180 0.0033 0.0023
0.075 0.0029 75 200 200 230 0.0029 0.0014 200 0.0029 0.0021
0.063 0.0024 63 230 250 250 0.0024 0.0016
0.053 0.0021 53 270 270 300 0.0021 0.0012 270 0.0021 0.0016
0.044 0.0017 44 325 325 325 0.0017 0.0014
0.037 0.0015 37 400 400 400 0.0015 0.0010
0.025 0.0010 25 500 500 0.0010 0.0010
0.020 0.0008 20 625 625 0.0008
0.015 0.0006 15 800 800 0.0006
0.010 0.0004 10 1250 1250 0.0004
0.005 0.0002 5 2500 2500 0.0002

Equivalent mesh sizes from 5 μm to 25.4 mm also exist.[1]

Available sieve sizes are usually regulated by standards. Those in common use are ISO 565:1990 and ISO 3310-1:2000 (international),[2] EN 933-1(European)[3] and ASTM E11:01 (US). EN standards are available with national 'badging'; so they appear as BS EN, FR EN, DE EN, etc.

Practical sizes

Although such information contains long lists of sieve sizes, in practice sieves are normally used in series in which each member sieve is selected to pass particles approximately 1/ smaller in diameter or 1/2 smaller in cross-sectional area than the previous sieve. For example the series 80mm, 63, 40, 31.5, 20, 16, 14, 10, 8, 6.3, 4, 2.8, 2 mm is routinely available in many European countries or the series with the larger steps 63, 31.5, 16, 8, 4, 2, 1 mm, 500 μm, 250, 125, 63 μm is commonly used to grade aggregates in the construction industry. Such series are somewhat derived from the principles originally established by Renard and now known as Renard series. Some users replace some of those indicated above with 45, 22.4, 12.5, 11.2 and 5.6 mm sieves, mostly because of historical usage of such sizes in their country or industry.

External links

Notes and References

  1. Web site: Particle Size - US Sieve Series and Tyler Mesh Size Equivalents . www.azom.com . 2020-10-13.
  2. https://www.iso.org/standard/25147.html ISO 3310-1:2000 Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
  3. https://www.en-standard.eu/din-en-933-1-tests-for-geometrical-properties-of-aggregates-part-1-determination-of-particle-size-distribution-sieving-method/ DIN EN 933-1 Tests for geometrical properties of aggregates - Part 1: Determination of particle size distribution - Sieving method'