UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

ISO FDIS 14644-17

Cleanrooms and associated controlled environments — Part 17: Particle deposition rate applications

active, Most Current
Buy Now
Organization: ISO
Publication Date: 10 October 2020
Status: active
Page Count: 34
ICS Code (Cleanrooms and associated controlled environments): 13.040.35
scope:

This document gives direction on the interpretation and application of the results of the measurement of particle deposition rate on one or more vulnerable surfaces in a cleanroom as part of a contamination control programme. It provides some instructions on how to influence the particle deposition rate and reduce the risk of particle contamination on vulnerable surfaces.

This document gives information on how a cleanroom user can use the particle deposition rate measurements to determine limits that can be set for macroparticles on vulnerable surfaces. It also gives a risk assessment method by which an acceptable risk of deposition of particles onto vulnerable surfaces in a cleanroom can be established and, when this is not achieved, methods that can be used to reduce the particle deposition rate.

An alternative to the particle deposition rate is the particle obscuration rate which determines the rate of increase of coverage of particles onto an area of surface over time. The particle obscuration rate can be used in an analogous way to the particle deposition rate and the required particle obscuration rate for a specified surface can be calculated and the risk from deposited particles reduced.

This document does not:

- provide a method to classify a cleanroom with respect to particle deposition rate or particle obscuration rate;

- directly consider the deposition of microbe-carrying particles, although they can be treated as particles;

- give any consideration to surface deposition by contact as, for example, when personnel touch a product and contamination is transferred.

Document History

ISO FDIS 14644-17
October 10, 2020
Cleanrooms and associated controlled environments — Part 17: Particle deposition rate applications
This document gives direction on the interpretation and application of the results of the measurement of particle deposition rate on one or more vulnerable surfaces in a cleanroom as part of a...

References

Advertisement