ASTM F1471 PDF

Standard Test Method for Air Cleaning Performance of a High-Efficiency Particulate Air- Filter System (Withdrawn 2018)

ASTM F1471 – Standard Test Method for Air Cleaning Performance of a High-Efficiency Particulate Air- Filter System (Withdrawn 2018)

1.1 This test method covers the procedure and equipment for measuring the penetration of test particles through high-efficiency particulateair (HEPA) filter systems using a laser aerosol spectrometer (LAS). This testmethod provides the capability of evaluating the overall effectiveness ofHEPA filter systems consisting of one or two filter stages.

1.2 The aerosols used for testing have a heterodisperse size distribution in the submicrometer diameter range from 0.1 to 1.0 μm.

1.3 The purpose for conducting in-place filter testing by this test method is in the ability to determine penetration of multi-stageinstallations, without individual stage tests. Particle penetration as lowas 10⁻⁸ can be measured by this test method. Also, the LASprovides a measure of penetration for discrete particle sizes.

1.4 Maximum penetration for an installed HEPA filter system is 5 × 10⁻⁴ for one filter stage,and 2.5 × 10⁻⁷ for two stages in seriesis recommended.

Note 1 – Acceptance penetration criteria must be specified in the program, or owners specifications. The penetration criteria suggested in this test methodis referenced in Ref (1).

1.5 The values stated in SI units are to be regarded as the standard.

1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 9.6.