Monday, 16 October 2017

New standards for cleanroom construction


Tim Sandle has written a new article for Cleanroom Technology around the subject of cleanroom construction. A new part of ISO 14644 – part 14 – came out last year which covers cleanroom equipment specification. Tim Sandle looks at why it was introduced and its relevance for those specifiying equipment for use inside cleanrooms.

Cleanrooms are designed to minimize the ingress of airborne particles (achieved through HEPA or ULPA filters) and to control what happens to particles generated within the cleanroom. Good air flow design — such as turbulent flow — helps to prevent particles from being deposited onto surfaces (particles settle by two primary mechanisms: gravitational sedimentation and turbulent deposition). The removal of these particles is achieved through the extraction of room air with the addition of clean air into the room (air exchange rates). The flow of particles in air from a less clean area can also be blocked from entering an area of a higher cleanliness level through positive pressure differentials.

The reference is:

Sandle, T. (2017) Applying design and construction standards to cleanroom builds, Cleanroom Technology, 25 (8): 16-18

For further details, please contact Tim Sandle

Posted by Dr. Tim Sandle