BS EN ISO 14644-1 Cleanrooms and associated controlled environments. Classification of air cleanliness

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BS EN ISO 14644-1:1999

Cleanrooms and associated controlled environments. Classification of air cleanliness

Status : Revised, Withdrawn   Published : August 1999 Replaced By : BS EN ISO 14644-1:2015

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BS EN ISO 14644-1:1999 Cleanrooms and associated controlled environments. Classification of air cleanliness

BS EN ISO 14644-1:1999 covers the classification of air cleanliness in cleanrooms and associated controlled environments. This is based solely on the concentration of airborne particles. Only particle populations having cumulative distributions based upon threshold sizes ranging from 0.1μm to 5μm are considered for classification purposes.

According to the standard, airborne particulate cleanliness is designated by a classification number, N. The maximum permitted concentration of particles, Cn, for each considered particle size, D, is determined using:

Where: Cn is the maximum permitted concentration (in particles/m3 of air) of airborne particles that are equal or larger than the considered particle size.

Note: Cn is rounded up to the nearest whole number, using no more than three significant figures.

N is the ISO classification number (Not larger than 9). Intermediate ISO classification numbers may be specified, with 0.1 the smallest permitted increment of N.

D is the considered particle size in μm.

0.1  is a constant, with a dimension of μm.

The remainder of the standard specifies how users can demonstrate compliance. Annexes provide requirements for how the particulate cleanliness classification can be determined using a discrete-particle-counting light scattering instrument and on the statistical treatment of particle concentration data.

See other cleanrooms standards in the BS EN ISO 14644 series.

 




Standard NumberBS EN ISO 14644-1:1999
TitleCleanrooms and associated controlled environments. Classification of air cleanliness
StatusRevised, Withdrawn
Publication Date15 August 1999
Withdrawn Date31 January 2016
Replaced ByBS EN ISO 14644-1:2015
ReplacesBS 5295-1:1989
International RelationshipsEN ISO 14644-1:1999,ISO 14644-1:1999
Amended ByAMD 13013
AMD 13013 is a Corrigendum.
Draft Superseded By96/126782 DC
DescriptorsClean rooms, Environmental cleanliness, Classification systems, Particulate air pollutants, Particle size distribution, Designations, Concentration, Conformity, Test equipment, Sample location, Sampling methods, Samples, Outliers, Statistical methods of analysis, Algorithms, Mathematical calculations, Sequential sampling
ICS13.040.35
Title in FrenchSalles propres et environnements maitrises apparentes. Classification de la proprete de l'air
Title in GermanReinraeume und zugehoerige Reinraumbereiche. Klassifizierung der Luftreinheit
CommitteeLBI/30
ISBN0 580 32951 8
PublisherBSI
FormatA4
DeliveryNo
Pages34
File Size494.4 KB
Price£198.00


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