Standard sieves and Mesh sizes
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Sieves Standard no. Mesh sizes and Designations
See below for
Particle size conversions
Mesh Size
(microns) |
TYLER |
ASTM-E11
|
BS-410
|
DIN-4188
|
µm |
Mesh |
No. |
Mesh |
mm |
5 |
2500 |
|
2500 |
0.005 |
10 |
1250 |
|
1250 |
0.010 |
15 |
800 |
|
800 |
0.015 |
20 |
625 |
|
625 |
0.020 |
22 |
|
|
|
0.022 |
25 |
500 |
|
500 |
0.025 |
28 |
|
|
|
0.028 |
32 |
|
|
|
0.032 |
36 |
|
|
|
0.036 |
38 |
400 |
400 |
400 |
|
40 |
|
|
|
0.040 |
45 |
325 |
325 |
350 |
0.045 |
50 |
|
|
|
0.050 |
53 |
270 |
270 |
300 |
|
56 |
|
|
|
0.056 |
63 |
250 |
230 |
240 |
0.063 |
71 |
|
|
|
0.071 |
75 |
200 |
200 |
200 |
|
80 |
|
|
|
0.080 |
90 |
170 |
170 |
170 |
0.090 |
100 |
|
|
|
0.100 |
106 |
150 |
140 |
150 |
|
112 |
|
|
|
0.112 |
125 |
115 |
120 |
120 |
0.125 |
140 |
|
|
|
0.140 |
150 |
100 |
100 |
100 |
|
160 |
|
|
|
0.160 |
180 |
80 |
80 |
85 |
0.180 |
200 |
|
|
|
0.200 |
212 |
65 |
70 |
72 |
|
250 |
60 |
60 |
60 |
0.250 |
280 |
|
|
|
0.280 |
300 |
48 |
50 |
52 |
|
315 |
|
|
|
0.315 |
355 |
42 |
45 |
44 |
0.355 |
400 |
|
|
|
0.400 |
425 |
35 |
40 |
36 |
|
450 |
|
|
|
0.450 |
500 |
32 |
35 |
30 |
0.500 |
560 |
|
|
|
0.560 |
600 |
28 |
30 |
25 |
|
Copyright © 1995-2003, Process Associates of America. All Rights Reserved.
Particle Size Conversion
Sieve Designation |
Nominal Sieve Opening |
Standard | Inches | Mesh | mm | Microns |
25.4mm |
1 in. |
21.00 |
25.4 |
225400 |
222.6mm |
7/8 in. |
20.875 |
22.6 |
222600 |
219.0mm |
3/4 in. |
20.750 |
19.0 |
219000 |
216.0mm |
5/8 in. |
20.625 |
16.0 |
216000 |
213.5mm |
0.530 in. |
20.530 |
13.5 |
213500 |
212.7mm |
1/2 in. |
20.500 |
12.7 |
212700 |
211.2mm |
7/16 in. |
20.438 |
11.2 |
211200 |
29.51mm |
3/8 in. |
20.375 |
9.51 |
29510 |
28.00mm |
5/16 in. |
20.312 |
8.00 |
28000 |
26.73mm |
0.265 in. |
20.265 |
6.73 |
26730 |
26.35mm |
1/4 in. |
20.250 |
6.35 |
26350 |
25.66mm |
No. 3 1/2 |
20.223 |
5.66 |
25660 |
24.76mm |
No. 4 |
20.187 |
4.76 |
24760 |
24.00mm |
No. 5 |
20.157 |
4.00 |
24000 |
23.36mm |
No. 6 |
20.132 |
3.36 |
23360 |
22.83mm |
No. 7 |
20.111 |
2.83 |
22830 |
22.38mm |
No. 8 |
20.0937 |
2.38 |
22880 |
22.00mm |
No. 10 |
20.0787 |
2.00 |
22000 |
21.68mm |
No. 12 |
0.0661 |
1.68 |
21680 |
21.41mm |
No. 14 |
20.0555 |
1.41 |
21410 |
1.19mm |
No. 16 |
20.0496 |
1.19 |
21190 |
21.00mm |
No. 18 |
20.0394 |
1.00 |
21000 |
2841µm |
No. 20 |
20.0331 |
0.841 |
2841 |
2707µm |
No. 25 |
20.0278 |
0.707 |
2707 |
2595µm |
No. 30 |
20.0234 |
0.595 |
2595 |
2500µm |
No. 35 |
20.0197 |
0.500 |
2500 |
2420µm |
No. 40 |
20.0165 |
0.420 |
2420 |
2345µm |
No. 45 |
0.0139 |
0.345 |
2345 |
2297µm |
No. 50 |
20.0117 |
0.297 |
2297 |
2250µm |
No. 60 |
20.0098 |
0.250 |
2250 |
2210µm |
No. 70 |
20.0083 |
0.210 |
2210 |
2177µm |
No. 80 |
20.0070 |
0.177 |
2177 |
2149µm |
No. 100 |
20.0059 |
0.149 |
2149 |
2125µm |
No. 120 |
20.0049 |
0.125 |
2125 |
2105µm |
No. 140 |
20.0041 |
0.105 |
2105 |
288µm |
No. 170 |
20.0035 |
0.088 |
288 |
274µm |
No. 200 |
20.0029 |
0.074 |
274 |
263µm |
No. 230 |
20.0025 |
0.063 |
263 |
253µm |
No. 270 |
20.0021 |
0.053 |
253 |
244µm |
No. 325 |
20.0017 |
0.044 |
244 |
237µm |
No. 400 |
20.0015 |
0.037 |
237 |
NOTES:
Larger sieve openings (1 in. to 1/4 in.) have been designated by a sieve "mesh" size that corresponds to the size of the opening in inches. Smaller sieve "mesh" sizes of 3 1/2 to 400 are designated by the number of openings per linear inch in the sieve.
The following convention is used to characterize particle size by mesh designation:
a "+" before the sieve mesh indicates the particles are retained by the sieve;
a "-" before the sieve mesh indicates the particles pass through the sieve;
typically 90% or more of the particles will lie within the indicated range.
For example, if the particle size of a material is described as -4 +40 mesh, then 90% or more of the material will pass through a 4-mesh sieve (particles smaller than 4.76 mm) and be retained by a 40-mesh sieve (particles larger than 0.420 mm). If a material is described as -40 mesh, then 90% or more of the material will pass through a 40-mesh sieve (particles smaller than 0.420 mm).
This information is also provided on page T848 of the Aldrich 2003-2004 Catalog/Handbook of Fine Chemicals.
|
Signature: Dhanlal De Lloyd, Chem. Dept, The University of The West Indies, St. Augustine campus
The Republic of Trinidad and Tobago.
Copyright: delloyd2000© All rights reserved.