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Comparison of cleanliness levels between ISO-14644 and equivalent standards in various countries is as follows

Comparison of cleanliness levels between ISO-14644 and equivalent standards in various countries is as follows

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Comparison of cleanliness levels between ISO-14644 and equivalent standards in various countries is as follows:

Comparison of cleanliness levels between ISO-14644 and equivalent standards in various countries

International standard ISO-14644

Chinese standard
GB 50073

American standard
FS 209E

Russian standard
TOCT 50766

Japanese standard
TIS 9920

German standard

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/

/

P0

/

/

1

1

/

P1

1

1

2

2

/

P2

2

2

3

3

M1.5

P3

3

3

4

4

M2.5

P4

4

4

5

5

M3.5

P5

5

5

6

6

M4.5

P6

6

6

7

7

M5.5

P7

7

7

8

8

M6.5

P8

8

8