GMP News No. 192
3 May 2002
FDA: Federal Standard 209 Replaced
The Federal Standard 209 was the most important document in the field of cleanroom technology for more than 40 years. This document has now officially been replaced by a standard of the International Organisation for Standardization (ISO). The name of the new document is ISO 14644-1 Cleanrooms and Associated Controlled Environments - Part 1 Classification of air cleanliness.
The Institute of Environmental Sciences and Technology (IEST) acts as office for ISO/TC 209 and has developed this document as the first in a series of 11 documents in order to harmonise the requirements worldwide.
Details regarding the series ISO 14644 can be found in our News of 17 December 2001, in which we reported about the innovations already at the end of last year.
In addition to Part 1 of ISO 14644, which has now come into force, Part 3 is currently under discussion:
At the beginning of the 90s, ISO began to establish Guidelines of world-wide validity. In analogy to the VDI (association of German engineers) Guideline 2083 Sheet 3 - Messtechnik in der Reinraumluft (Metrology in Cleanroom Air), the ISO Guideline 14644 Part 3 - Metrology and Test Methods was created. Since the contents of the ISO Guideline cover most of VDI 2083-3, in 2000 the VDI started to revise Sheet 3 of this Guideline. The objective of the revision is to enlarge on those items of which the ISO Guideline does not give as many details as is usual or necessary in the German-speaking countries in a way that they can be put into practice more easily. When the two Guidelines will be available to the users - probably in 2002 - the ISO Guideline shall be applicable in general, whereas for some items the VDI Guideline shall supply further details. The German version of the ISO Guideline is planned to be published as DIN - EN 14644 - 3. However, which test and measuring methods should be used in acceptance tests or requalifications remains in the end an agreement between user and supplier.
Contents - ISO 14644 Part 3 - Metrology and test methods
The ISO Guideline 14644 Part 3 has been published as CD (Committee Draft). Its contents are structured as follows:
Annexes to the ISO 14644-3 Guideline:
Testing Procedures - Chapter 4 of ISO 14644-3
A well-structured table describes the relationship between the measurement parameters, the testing procedures to be applied and the instruments to be used. It also shows the ISO standards that are to be applied just like in the case of the airborne particle count for classification defined in 14644 part 1.
Table: Overview of the recommended test parameters, the related testing procedures and the suitable measurement instruments
Annex A - Choice of recommended tests of an installation and the sequence in which to carry them out
In this chapter the recommended testing procedures are explained. A
table helps you to select the test sequence as well as the measuring
instrument or the testing equipment used.
Table: Extract of the table in Annex A - Choice of recommended tests of an installation and the sequence in which to carry them out
Annex B - Recommendation for test methods
In Annex B you can find recommendations on how to carry out the various tests and measurements. Apart from this, the recommended procedures are described. The structure of each of the procedures B.1 to B.14 is given in the following order:
To all those interested in detailed knowledge
of GMP design we recommend: