Monday, 22 February 2016

ISO 14644 Part 13 - public comment


Part 13 of the revised international cleanroom standard is available for public comment. The details are:

‘Surface’ refers to the interface between two phases. For the purpose of this document, the surface is a solid. “Clean surface” is where one or more of the contamination categories (particles, chemical) are under control due to cleaning / decontamination. The degree of cleanliness is specified in the corresponding surface cleanliness classifications (ISO 14644-9:2012 Surface cleanliness by particle concentration SCP; ISO 14644- 10:2013 Surface cleanliness by chemical concentration SCC). Different cleaning methods are necessary depending on the degree of cleanliness (cleanliness class) required. This standard gives guidance on the selection of cleaning methods to achieve specified cleanliness levels. For the selection procedure, the aspects of surface description, cleanliness specifications, types of contamination, cleaning techniques, material compatibility, and assessment methodology are taken into consideration. Most of the methods are suitable for removal of more than one contamination category at the same time therefore a common standard for the selection of a cleaning method for both particles as well as chemical contamination is needed.

Guidance is provided on the assessment of cleaning methods for achieving the required surface cleanliness levels specified in ISO 14644-9: Classification of surface cleanliness by particle concentration and ISO 14644-10: Classification of surface cleanliness by chemical concentration. Different cleaning methods may be necessary depending on the degree of cleanliness required. The selection procedure considers aspects such as surface description, cleanliness specifications, types of contamination, cleaning techniques, and material compatibility. Guidance is provided on assessing cleaning efficacy.

The reference is: 

Draft for Public Comment 16/30280732 DC Draft ISO 14644-13 "Cleanrooms and associated controlled environments Part 13 Cleaning of surfaces to achieve defined levels of cleanliness in terms of particle and chemical classifications."

Interested parties should contact their local standards committee to obtain a copy.

Posted by Dr. Tim Sandle

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