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Small numbers refer to ISO 14644-1 standards, which specify the decimal logarithm of the number of particles 0.1 μm or larger permitted per m 3 of air. So, for example, an ISO class 5 cleanroom has at most 10 5 particles/m 3. Both FS 209E and ISO 14644-1 assume log-log relationships between particle size and particle concentration.
ISO 14644 Standards were first formed from the US Federal Standard 209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones. The need for a single standard for cleanroom classification and testing was long felt. After ANSI and IEST petitioned to ISO for new standards, the first document of ISO 14644 was published in 1999, ISO ...
[note 2] For a complete and up-to-date list of all the ISO standards, see the ISO catalogue. [1] The standards are protected by copyright and most of them must be purchased. However, about 300 of the standards produced by ISO and IEC's Joint Technical Committee 1 have been made freely and publicly available. [2]
ISO 9177-1:2016 Part 1: Classification, dimensions, performance requirements and testing; ISO 9177-2:1989 Part 2: Black leads – Classification and dimensions; ISO 9177-3:1994 Part 3: Black leads – Bending strengths of HB leads; ISO 9180:1988 Black leads for wood-cased pencils – Classification and diameters; ISO 9186 Graphical symbols ...
India (IND) IS 5572-1994 Hazardous Area Classification IS 5572-1994 Russia (RUS) ГОСТ Р 51330.9-99 Классификация опасных зон United States (USA) National Electrical Code(NEC) Article 505 United Nations IEC 60079-10.2 Classification of areas
The International Classification for Standards has 99 top-level divisions of which only 40 are presently used. The remaining 59 divisions are reserved for topics that are not yet known. There are three "official" levels in the ICS system, each holding ninety nine (99), nine hundred and ninety nine (999) and ninety nine (99) subsets, respectively.
ISO 668 – Series 1 freight containers – Classification, dimensions and ratings is an ISO international standard which nominally classifies intermodal freight shipping containers, and standardizes their sizes, measurements and weight specifications. [1] The current version of the standard is the Seventh edition (2020), which integrates ...
ISO 2286-2:2016 Part 2: Methods for determination of total mass per unit area, mass per unit area of coating and mass per unit area of substrate; ISO 2286-3:2016 Part 3: Method for determination of thickness; ISO 2288:1997 Agricultural tractors and machines — Engine test code — Net power [Withdrawn without replacement]