Sieves

Sieves

Table of Contents

References

Sieves are used to classify powders and granules in production and for analytical purposes. They are specified according to DIN/ISO 565 which is equivalent to ISO 3310-1. The following table, which is based on the USP text, compares the ISO sieves with those mentioned in Ph. Eur. and Japan. The US sieve numbers (mesh) are provided in the table for conversion purposes only.

ISO Nominal Aperture

 

 

 

Principal sizes

Supplementary sizes

Recommended USP sieves

US sieve no. (mesh)

Ph. Eur. sieve no.

Japan sieve no.

11.20mm

 

 

 

11200

 

5.60mm

 

 

 

5600

3.5

 

4.75mm

 

 

 

4

4.00mm

 

4000

5

4000

4.7

 

3.35mm

 

6

 

5.5

2.80mm

 

2800

7

2800

6.5

 

2.36mm

 

8

 

7.5

2.00mm

 

2000

10

2000

8.6

 

1.7mm

 

12

 

10

1.40mm

 

1400

14

1400

12

 

1.18mm

 

16

 

14

1.00mm

 

1000

18

1000

16

 

850µm

 

20

 

18

710µm

 

710

25

710

22

 

600µm

 

30

 

26

500µm

 

500

35

500

30

 

425µm

 

40

 

36

355µm

 

355

45

355

42

 

300µm

 

50

 

50

250µm

 

250

60

250

60

 

212µm

 

70

 

70

180µm

 

180

80

180

83

 

150µm

 

100

 

100

125µm

 

125

120

125

119

 

106µm

 

140

 

140

90µm

 

90

170

90

166

 

75µm

 

200

 

200

63µm

 

63

230

63

235

 

53µm

 

270

 

282

45µm

 

45

325

45

330

 

38µm

 

 

38

391

 

 

 

 

 

 

References

USP/NF (786) Particle size distribution estimation by analytical sieve testing, USP32/NF27, 307 (2009).

Ph. Eur. 2.1.4 Sieves, Kommentar Ph. Eur. 4.00, 2.1.4 Siebe (2004).

J. Goede, Verarbeitung von Stoffen/Trennen, in E. Nürnberg and P. Surmann (eds.), Hagers Handbuch der Pharmazeutischen Praxis, 5th ed., vol. 2 Methods, p. 586-587, Springer, Berlin, Heidelberg, New York (1991).