International Organization for Standardization (ISO)
Latest
ISO 2194:1991
Scope
Table 1 (millimetre sizes) gives principal sizes (R 10) from 1 to 125, and supplementary sizes: R 20 and R 40 from 1 to 125. Table 2 (micrometre sizes) gives principal sizes (R 10) from 5 to 800, and supplementary sizes: R 20 from 20 to 900, R 40 from 32 to 950. This second edition cancels and replaces the first edition (1972).
ISO 2194:1991 history
1991ISO 2194:1991 Industrial screens; woven wire cloth, perforated plate and electroformed sheet; designation and nominal sizes of openings
1972ISO 2194:1972 Wire screens and plate screens for industrial purposes — Nominal sizes of apertures