Why is ISO 14644-3:2019 not approved by US?

Ajit Basrur

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The ISO 14644-3 standard (Test methods in support of the operation for cleanrooms and clean zones to meet air cleanliness classification, other cleanliness attributes and related controlled conditions.) was published in Aug 2019. However per IEST, this standard is not approved by the US canvas body. Does anyone have additional information regarding this?
 

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MDRexpert

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Did you get any response? This standard is updated by ISO to 2019 but the consensus standard list still refers to former version.
 
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