Standard Test Method for Air Cleaning Performance of a High-Efficiency Particulate Air- Filter System (Withdrawn 2018)

SIGNIFICANCE AND USE
This test method describes a procedure for determining the penetration of aerosols through a one- or twostage HEPA filter installation. Testing multiple filter stages as a single unit eliminates the need for: installation of auxiliary aerosol bypass ducts, installation of aerosol injection manifolds between filter stages, and entry of test personnel into contaminated areas. It provides for filter testing without interruption of plant processes and operation of ventilation systems.
The procedure is applicable for measuring penetrations requiring sensitivities to 0.1 μm.
A challenge concentration of 2.5 × 10 5 particles/cm3 (p/cm3), is required for evaluation of one-filter stage, and 2 × 106 p/cm 3, or about 30 μg/L (assuming unit density), is required to properly evaluate a two-stage HEPA filter system as one unit.
This test method can determine the penetration of HEPA filters in the particle-size range from 0.1 to 0.2 μm where the greatest penetration of particles is likely to occur.
SCOPE
1.1 This test method covers the procedure and equipment for measuring the penetration of test particles through high-efficiency particulate air (HEPA) filter systems using a laser aerosol spectrometer (LAS). This test method provides the capability of evaluating the overall effectiveness of HEPA 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-stage installations, without individual stage tests. Particle penetration as low as 10−8 can be measured by this test method. Also, the LAS provides 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 series is recommended.
Note 1—Acceptance penetration criteria must be specified in the program, or owners specifications. The penetration criteria suggested in this test method is 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 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 9.6.
WITHDRAWN RATIONALE
This test method covers the procedure and equipment for measuring the penetration of test particles through high-efficiency particulate air (HEPA) filter systems using a laser aerosol spectrometer (LAS).
Formerly under the jurisdiction of Committee D22 on Air Quality, this test method was withdrawn in January 2018 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

Status
Withdrawn
Publication Date
28-Feb-2009
Withdrawal Date
18-Jan-2018
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM F1471-09 - Standard Test Method for Air Cleaning Performance of a High-Efficiency Particulate Air- Filter System (Withdrawn 2018)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F1471 − 09
Standard Test Method for
Air Cleaning Performance of a High-Efficiency Particulate
1
Air Filter System
This standard is issued under the fixed designation F1471; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This test method covers the procedure and equipment
Barriers to Trade (TBT) Committee.
for measuring the penetration of test particles through high-
efficiency particulate air (HEPA) filter systems using a laser
2. Referenced Documents
aerosol spectrometer (LAS). This test method provides the
3
2.1 ASTM Standards:
capabilityofevaluatingtheoveralleffectivenessofHEPAfilter
F328Practice for Calibration of anAirborne Particle Coun-
systems consisting of one or two filter stages.
ter Using Monodisperse Spherical Particles (Withdrawn
1.2 The aerosols used for testing have a heterodisperse size
4
2007)
distribution in the submicrometer diameter range from 0.1 to
2.2 Military Standard:
1.0 µm.
MIL-STD 282Military Standard Filter Units, Protective
1.3 Thepurposeforconductingin-placefiltertestingbythis
Clothing, Gas Mask Components, and Related Products:
5
test method is in the ability to determine penetration of
Performance Test Method
multi-stageinstallations,withoutindividualstagetests.Particle
−8
3. Terminology
penetrationaslowas10 canbemeasuredbythistestmethod.
Also, the LAS provides a measure of penetration for discrete
3.1 Definitions of Terms Specific to This Standard:
particle sizes.
3.1.1 diluter—a device used to reduce the aerosol particle
concentration to eliminate coincidence counting is in the LAS.
1.4 Maximum penetration for an installed HEPA filter
−4 −7
system is 5×10 for one filter stage, and 2.5×10 for two
3.1.2 dilution ratio—the ratio of the undiluted aerosol par-
stages in series is recommended.
ticle concentration entering the diluter to the diluted portion of
the particle concentration. Because diluters have inherent
NOTE 1—Acceptance penetration criteria must be specified in the
particle losses that may vary according to the particle size, the
program, or owners specifications. The penetration criteria suggested in
2
this test method is referenced in Ref (1).
dilution ratio may not be constant with respect to size.
1.5 The values stated in SI units are to be regarded as the
3.1.3 laser aerosol spectrometer (LAS)—aprecisionparticle
standard.
detector that allows single particle counting and sizing by the
amount of scattered light from individual particles, where the
1.6 This standard does not purport to address all of the
signals can be grouped into categories corresponding to par-
safety problems, if any, associated with its use. It is the
ticle size.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.1.4 penetration—the number of particles passing through
bility of regulatory limitations prior to use. Specific precau-
the filter stage, to the number of particles challenging the
tionary statements are given in 9.6.
upstream side of the filter stage. The penetration, or the
1.7 This international standard was developed in accor-
challenge aerosol, may be associated for each particle size of
dance with internationally recognized principles on standard-
interest.
ization established in the Decision on Principles for the
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This test method is under the jurisdiction of ASTM Committee D22 on Air Standards volume information, refer to the standard’s Document Summary page on
Quality and is the direct responsibility of Subcommittee D22.05 on Indoor Air. the ASTM website.
4
Current edition approved March 1, 2009. Published March 2009. Originally The last approved version of this historical standard is referenced on
approved in 1993. Last previous edition approved in 2001 as F1471–93 (2001). www.astm.org.
5
DOI: 10.1520/F1471-09. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
2
The boldface numbers in parentheses refer to a list of references at the end of Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
this standard. www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F1471 − 09
4. Summary of Test Method 6.4 Sample flow accuracy through the LAS of
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