Size number

Capillary tube inner diameter MM

Range of kinematic viscosityMM²/S

0

0.24

0.3~1

0C

0.36

0.6~3

0B

0.46

1~5

0A

0.5

1.5~7

1

0.58

2~10

1C

0.78(0.77)

6~30

1B

0.88

10~50

2

1.03

20~100

2C

1.36

60~300

2B

1.55

100~500

2A

1.71

150~750

3

1.83

200~1000

3C

2.43

600~3000

3B

2.75

1000~5000

4

3.27

2000~10000

4C

4.32

6000~30000

4B

5.2

10000~50000

5

6.25

20000~100000

Note: Inner diameter 0.34-0.4mm, used for GB8326-87

Inner diameter 0.36MM in HG/T2626-94 and 2627-97 2234-91

Inner diameter 0.77MM for GB/T14190-9

Inner diameter 1.03mm for HG/T2364-92