Mesh (scale)

Granulometry
Basic concepts
Particle size · Grain size
Size distribution · Morphology
Methods and techniques
Mesh scale · Optical granulometry
Sieve analysis · Soil gradation
Related concepts
Granulation · Granular material
Mineral dust · Pattern recognition
Dynamic light scattering

Mesh is 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 Sieve Mesh Dimensions
Sieve size Opening Standard Mesh Tensile Bolting Cloth Mill Grade Market Grade
(mm) (in) (μm) US Tyler Mesh Opening Wire Mesh Opening Wire Mesh Opening Wire
5.60 0.22 5600 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 - 14 12 16 0.0535 0.009 14 0.054 0.017 14 0.051 0.0204
1.18 0.0469 - 16 14 18 0.0466 0.009 16 0.0465 0.016 16 0.0445 0.0181
1.00 0.0394 - 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 - - - - 40 0.0185 0.0065 36 0.0188 0.009 - - -
0.465 - - - - 42 0.0183 0.0055 38 0.0178 0.0085 - - -
0.437 - - - - 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 - - - - 48 0.0153 0.0055 - - - 40 0.0150 0.0104
0.368 - - - - 50 0.0145 0.0055 - - - - - -
0.355 0.0139 355 45 42 52 0.0137 0.0055 45 0.0142 0.008 - - -
0.310 - - - - 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 - - - - 64 0.0111 0.0045 - - - 50 0.0110 0.0090
0.270 - - - - 70 0.0106 0.0037 - - - - - -
0.260 - - - - 72 0.0102 0.0037 - - - - - -
0.250 0.0098 250 60 60 74 0.0098 0.0037 60 0.0102 0.0065 - - -
0.241 - - - - 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

Further information on equivalent mesh sizes from 5 μm to 25.4 mm is available.[1][2] Available sieve sizes are usually regulated by standards. Those in common use are ISO 565:1990 and ISO 3310-1:2000 (international), EN 933-1(European) and ASTM E11:01 (US). EN standards are available with national 'badging' so appear as BS EN, FR EN, DE, etc.

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/√2 or 1/2 smaller in size 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.

References

  1. ↑ Equivalent mesh sizes from 5microns to 25.4mm, retrieved 2009-05-19
  2. ↑ Particle Size Conversion, retrieved 2012-01-24

External links

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