Sieve Comparison

Several standardised mesh series have been established by industry to determine the particle size distribution of granular materials. Applicable standards are ISO 565 (1987), ISO 3310 (1999), ASTM E 11-70 (1995), DIN 4188 (1977), BS 410 (1986), and AFNOR NFX11-501 (1987). This table compares different sieve standards. Sieves on the same line are equivalent. Colour coding is used in the table to indicate the units of measurement as shown below.

mm (SI unit)

µm (SI unit)

inch

US mesh

Tyler mesh

BS mesh

 

ISO 565
ISO 3310
DIN 4188 AFNOR NFX11-501 ASTM E-11-70 Tyler® BS 410
26.5 25.0 25.0 1.06 1.05
25.0 22.4 22.4 1
22.4 20.0 20.0 7/8 0.883
19.0 18.0 18.0 3/4 0.742
16.0 16.0 16.0 5/8 0.624
13.2 14.0 14.0 0.530
12.5 12.5 12.5 1/2
11.2 11.2 11.2 7/16 0.441
9.5 10.0 10.0 3/8 0.371
9.0 9.0
8.0 8.0 8.0 5/16 2.5
6.7 7.1 7.1 0.265 3
6.3 6.3 6.3 1/4
5.6 5.6 5.6 3 1/2 3.5 3
4.75 5.0 5.0 4 3 1/2
4.5 4.5
4.0 4.0 4.0 5 5 4
3.35 3.55 3.55 6 5
3.15 3.15
2.8 2.8 2.8 7 6
2.36 2.5 2.5 8 8 7
2.24 2.24
2.0 2.0 2.0 10 8
1.7 1.8 1.8 12 10 10
1.6 1.6
1.4 1.4 1.4 14 12 12
1.18 1.25 1.25 16 14 14
1.12 1.12
1.0 1.0 1.0 18 16 16
850 900 0.900 18
800 0.800 20 20
710 710 0.710 25 24 22
630 0.630
600 30 28 25
560 0.560
500 500 0.500 35 32 30
450 0.450
425 430 0.430 40 35 36
400 0.400
355 355 0.355 45 42 44
315 0.315
300 50 48 52
280 0.280
250 250 0.250 60 60 60
212 224 0.224 70 65 72
200 0.200
180 180 0.180 80 80 85
160 0.160
150 100 100
140 0.140
125 125 0.125 120 115 120
106 112 0.112 140 150 150
100 0.100
90 90 0.090 170 170 170
80 0.080
75 200 200 200
71 0.071
63 63 0.063 230 250 240
53 56 0.056 270 270 300
50 0.050
45 45 0.045 325 325 350
38 40 0.040 400 400 400
36 0.036
32 32 0.032 450 450 440
25 25 0.025 500 500
20 20 0.020 635 635
16 16 0.016
10 10 0.010