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ASTM F318-06

(Practice)

Standard Practice for Sampling Airborne Particulate Contamination in Cleanrooms for Handling Aerospace Fluids

Standard Practice for Sampling Airborne Particulate Contamination in Cleanrooms for Handling Aerospace Fluids

ABSTRACT
This practice establishes the standard procedures (including apparatus, reagents, and materials to be used) for taking samples of airborne particulate matter in a specific area in the aerospace industry, commonly called the cleanroom, where aerospace fluids are handled. This practiced is based on the impingement of particles on a filter membrane using a vacuum technique. The number of air samples required in a given area will depend on the geometric floor area, the disturbance to the uninterrupted airflow pattern, and the room volume.
SCOPE
1.1 This practice covers a procedure for sampling airborne particulate matter larger than 5 m in size. The method is designed to be used in specific areas, commonly called cleanrooms in the aerospace industry, where aerospace fluids are handled. Note 1
Practice F 50 is an alternative procedure.
This standard does not purport to address all of the safety concerns, 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.

General Information

Status
Withdrawn
Publication Date
31-Mar-2006
ICS
13.040.30 - Workplace atmospheres
Technical Committee
E21 - Space Simulation and Applications of Space Technology
Drafting Committee
E21.05 - Contamination
Current Stage
Ref Project

Relations

Replaces
ASTM F318-04 - Standard Practice for Sampling Airborne Particulate Contamination in Clean Rooms for Handling Aerospace Fluids
Effective Date
01-Apr-2006
Replaced By
ASTM F25/F25M-21 - Standard Test Method for Sizing and Counting Airborne Particulate Contamination in Cleanrooms and Other Dust-Controlled Areas
Effective Date
11-Jun-2013
Referred By
ASTM F312-08(2023) - Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
Effective Date
01-Apr-2006
Referred By
ASTM E2352-19 - Standard Practice for Aerospace Cleanrooms and Associated Controlled Environments—Cleanroom Operations
Effective Date
01-Apr-2006

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ASTM F318-06 - Standard Practice for Sampling Airborne Particulate Contamination in Cleanrooms for Handling Aerospace FluidsASTM F318-06 - Standard Practice for Sampling Airborne Particulate Contamination in Cleanrooms for Handling Aerospace Fluids
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ASTM F318-06 - Standard Practice for Sampling Airborne Particulate Contamination in Cleanrooms for Handling Aerospace Fluids
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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: F318 − 06
StandardPractice for
Sampling Airborne Particulate Contamination in Cleanrooms
1
for Handling Aerospace Fluids
ThisstandardisissuedunderthefixeddesignationF318;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This practice covers a procedure for sampling airborne 3.1 Definitions:
particulate matter larger than 5 µm in size. The method is
3.1.1 cleanroom—an area in which the temperature,
designed to be used in specific areas, commonly called
humidity, and the airborne particulate contamination are con-
cleanrooms in the aerospace industry, where aerospace fluids
trolled as required.
are handled.
3.1.2 uninterrupted airflow pattern—the pattern of airflow
NOTE 1—Practice F50 is an alternative procedure.
that exists in a given area, when no personnel or equipment are
present to interrupt the airflow.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4. Summary of Practice
priate safety and health practices and determine the applica-
4.1 This practice is based on the impingement of particles
bility of regulatory limitations prior to use.
onafiltermembraneusingavacuumtechnique.Thenumberof
air samples required in a given area will be based upon the
2. Referenced Documents
geometric floor area, the disturbance to the uninterrupted
2
2.1 ASTM Standards:
airflow pattern, and the room volume. See also Practice E2042
D1193 Specification for Reagent Water
and Test Method F25.
D1836 Specification for Commercial Hexanes
D2021 Specification for Neutral Detergent, 40 PercentAlky-
5. Apparatus
3
lbenzene Sulfonate Type (Withdrawn 2000)
5.1 Filter Holder—Aerosolopen-typeforafiltermembrane.
E2042 Practice for Cleaning and Maintaining Controlled
Areas and Clean Rooms
5.2 Vacuum Pump or Aspirator—Minimum capacity 25 in.
F25 Test Method for Sizing and Counting Airborne Particu-
(635 mm) Hg at 10 standard L/min.
late Contamination in Cleanrooms and Other Dust-
5.3 Flowmeter—Orifice-type, rotameter-type or equivalent
Controlled Areas
positive flow-indicating device, capable of being calibrated to
F50 Practice for Continuous Sizing and Counting of Air-
a 65 % flow accuracy under sample area ambient conditions.
borne Particles in Dust-Controlled Areas and Clean
Calibration must be at a given vacuum using a given diameter
Rooms Using Instruments Capable of Detecting Single
and length of line from the vacuum source to the filter holder
Sub-Micrometre and Larger Particles
containing a filter membrane of the same pore size as used in
F312 Test Methods for Microscopical Sizing and Counting
the test sample.
Particles from Aerospace Fluids on Membrane Filters
5.4 Membrane Filter—Anominaloveralldiameterwithgrid
lines,indimensionalaccordwiththefilterholder,maybeused.
1
This practice is under the jurisdiction of ASTM Committee E21 on Space
The pore size should be selected with regard to pertinent
Simulation andApplications of Space Technology and is the direct responsibility of
particle ranges and a specified flow rate across an effective
Subcommittee E21.05 on Contamination.
2
sampling area of 1000 mm 6 5 %. Color contrast is recom-
Current edition approved April 1, 2006. Published April 2006. Originally
approved in 1965. Last previous edition approved in 2004 as F318 – 04. DOI: mended to aid in identification of particulate matter.
10.1520/F0318-06.
2
5.5 Forceps—Stainless steel, nonmagnetic, unserrated tips.
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
5.6 Microscope and Associated Apparatus—For a descrip-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
tion of a suitable apparatus, refer to Test Methods F312.
3
The last approved version of this historical standard is referenced on
www.astm.org. 5.7 Wash Bottle, fitted with an in-line filtration capability.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F318 − 06
6. Reagents and Materials 8. Preparation of Apparatus
6.1 Purity of Reagents—Reagent grade chemicals shall be 8.1 Prior to sampling, clean the filter holder and forceps by
used in all tests. Unless otherwise indicated, it is intended that
washing in a free-rinsing detergent, ketone-free isopropyl
all reagents shall conform to the specifications of the Commit- alcohol, a petroleum ether (30 to 60°C boiling rang
...

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1.1 This practice covers the determination of the particle concentration, by number, and the size distribution of airborne particles in dust-controlled areas and clean rooms, for particles in the size range of approximately 0.01 to 5.0 m. Particle concentrations not exceeding 3.5 106 particles/m3 (100 000/ft 3) are covered for all particles equal to and larger than the minimum size measured.
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