ASTM F311-08

Standard Practice for Processing Aerospace Liquid Samples for Particulate Contamination Analysis Using Membrane Filters

SIGNIFICANCE AND USE
This practice provides for the processing of liquid samples obtained in accordance with Practice F 302 and Practices F 303. It will provide the optimum sample processing for visual contamination methods such as Method F 312, and Test Method F 314.
SCOPE
1.1 This practice covers the processing of liquids in preparation for particulate contamination analysis using membrane filters and is limited only by the liquid-to-membrane filter compatibility.
1.2 The practice covers the procedure for filtering a measured volume of liquid through a membrane filter. When this practice is used, the particulate matter will be randomly distributed on the filter surface for subsequent contamination analysis methods.
1.3 The practice describes procedures to allow handling particles in the size range between 2 and 1000 μm with minimum losses during handling.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

General Information

• Status: Historical
• Publication Date: 30-Apr-2008
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: E21 - Space Simulation and Applications of Space Technology
• Drafting Committee: E21.05 - Contamination

Relations

• Replaces: ASTM F311-97(2002) - Standard Practice for Processing Aerospace Liquid Samples for Particulate Contamination Analysis Using Membrane Filters
• Effective Date: 01-May-2008
• Replaced By: ASTM F311-08(2013) - Standard Practice for Processing Aerospace Liquid Samples for Particulate Contamination Analysis Using Membrane Filters
• Effective Date: 01-Nov-2013
• Referred By: ASTM F303-08(2023)e1 - Standard Practices for Sampling for Particles in Aerospace Fluids and Components
• Effective Date: 01-May-2008
• Referred By: ASTM F3335-20 - Standard Guide for Assessing the Removal of Additive Manufacturing Residues in Medical Devices Fabricated by Powder Bed Fusion
• Effective Date: 01-May-2008
• Referred By: ASTM D4378-22 - Standard Practice for In-Service Monitoring of Mineral Turbine Oils for Steam, Gas, and Combined Cycle Turbines
• Effective Date: 01-May-2008
• Referred By: ASTM F302-09(2021) - Standard Practice for Field Sampling of Aerospace Fluids in Containers
• Effective Date: 01-May-2008
• Referred By: ASTM F310-07(2020) - Standard Practice for Sampling Cryogenic Aerospace Fluids
• Effective Date: 01-May-2008
• Referred By: ASTM F312-08(2023) - Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
• Effective Date: 01-May-2008
• Referred By: ASTM F331-13(2020) - Standard Test Method for Nonvolatile Residue of Solvent Extract from Aerospace Components (Using Flash Evaporator)
• Effective Date: 01-May-2008
• Referred By: ASTM D6439-23 - Standard Guide for Cleaning, Flushing, and Purification of Steam, Gas, and Hydroelectric Turbine Lubrication Systems
• Effective Date: 01-May-2008
• Referred By: ASTM F309-18 - Standard Practice for Liquid Sampling of Noncryogenic Aerospace Propellants
• Effective Date: 01-May-2008
• Referred By: ASTM D4174-23 - Standard Practice for Cleaning, Flushing, and Purification of Petroleum Fluid Hydraulic Systems
• Effective Date: 01-May-2008
• Referred By: ASTM D6224-22 - Standard Practice for In-Service Monitoring of Lubricating Oil for Auxiliary Power Plant Equipment
• Effective Date: 01-May-2008
• Referred By: ASTM G131-96(2023)e1 - Standard Practice for Cleaning of Materials and Components by Ultrasonic Techniques
• Effective Date: 01-May-2008

Standards Content (Sample)

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: F311 − 08
StandardPractice for
Processing Aerospace Liquid Samples for Particulate
1
Contamination Analysis Using Membrane Filters
ThisstandardisissuedunderthefixeddesignationF311;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 F302 Practice for Field Sampling of Aerospace Fluids in
Containers
1.1 This practice covers the processing of liquids in prepa-
F303 Practices for Sampling for Particles in Aerospace
ration for particulate contamination analysis using membrane
Fluids and Components
filters and is limited only by the liquid-to-membrane filter
F312 Test Methods for Microscopical Sizing and Counting
compatibility.
Particles from Aerospace Fluids on Membrane Filters
1.2 The practice covers the procedure for filtering a mea-
sured volume of liquid through a membrane filter. When this
3. Definition
practice is used, the particulate matter will be randomly
3.1 filtered liquid dispenser—as used in this practice, a
distributed on the filter surface for subsequent contamination
dispensercapableofdeliveringrinseliquidthroughafilterwith
analysis methods.
pore size no larger than half the size of the smallest particle
1.3 The practice describes procedures to allow handling
being considered for measurement.
particles in the size range between 2 and 1000 µm with
4. Significance and Use
minimum losses during handling.
4.1 This practice provides for the processing of liquid
1.4 The values stated in SI units are to be regarded as
samples obtained in accordance with Practice F302 and Prac-
standard. No other units of measurement are included in this
tices F303. It will provide the optimum sample processing for
standard.
visual contamination methods such as Method F312, and Test
2. Referenced Documents
Method F314.
2
2.1 ASTM Standards:
5. Apparatus and Materials
D287 Test Method for API Gravity of Crude Petroleum and
Petroleum Products (Hydrometer Method) 5.1 Filtration Funnel—The funnel opening in contact with
the membrane shall be approximately 35.0 mm in inside
D1078 Test Method for Distillation Range of Volatile Or-
ganic Liquids diameter. The effective area shall be calibrated. If the funnel is
to be used for measuring the sample volume, the funnel shall
D1193 Specification for Reagent Water
D1353 Test Method for Nonvolatile Matter in Volatile Sol- be calibrated within 62 % of the required volume.
vents for Use in Paint, Varnish, Lacquer, and Related
5.2 Membrane Filter Support—Either a fritted-glass,
Products
sintered-metal, polyphenyl-sulfone or stainless steel screen
D1836 Specification for Commercial Hexanes
may be used. The support shall be so designed as to enable
D2021 Specification for Neutral Detergent, 40 PercentAlky-
attachment to a vacuum flask.
3
lbenzene Sulfonate Type (Withdrawn 2000)
5.3 Vacuum Flask.
5.4 Funnel-Holding Device—A provision should be made
1
This practice is under the jurisdiction of ASTM Committee E21 on Space
for the dissipation of static electricity from the funnel.
Simulation andApplications of Space Technology and is the direct responsibility of
Subcommittee E21.05 on Contamination. 5.5 A clean bench or hood, supplied with unidirectional
Current edition approved May 1, 2008. Published May 2008. Originally
flow filtered air, in which uncovered components may be
approved in 1969. Last previous edition approved in 2002 as F311 – 97 (2002).
placed.
DOI: 10.1520/F0311-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.6 Vacuum Source—Minimum vacuum gage reading of 61
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
kPa (or other metric units acceptable to ASTM).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
5.7 Forceps, unserrated tips.
3
The last approved version of this historical standard is referenced on
www.astm.org. 5.8 Filtered Liquid Dispenser.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F311 − 08
solvent is compatible with the membrane filter and adequate ventilation is
5.9 Membrane Filter, pore size no greater than half the size
used to avoid inhalation of the vapors.
of the smallest particle being considered for measurement.The
filter shall have an imprinted grid on 3.10 6 0.02-mm centers. 6.6 Rinse Liquid—This liquid shall be specified by the user
The color shall be chosen to provide maximum contrast with and shall be compatible with the sample liquid the plastic film
the particulate contamination to be observed. (see section 5.12) and the m
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:F311–97 (Reapproved 2002) Designation:F311–08
Standard Practice for
Processing Aerospace Liquid Samples for Particulate
1
Contamination Analysis Using Membrane Filters
This standard is issued under the fixed designation F 311; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the processing of liquids in preparation for particulate contamination analysis using membrane filters
and is limited only by the liquid-to-membrane filter compatibility.
1.2 The practice covers the procedure for filtering a measured volume of liquid through a membrane filter. When this practice
is used, the particulate matter will be randomly distributed on the filter surface for subsequent contamination analysis methods.
1.3The practice describes procedures to allow handling particles in the size range between 2 and 50 µm with minimum losses
during handling.
1.3 Thepracticedescribesprocedurestoallowhandlingparticlesinthesizerangebetween2and1000µmwithminimumlosses
during handling.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
D 287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
D 1078 Test Method for Distillation Range of Volatile Organic Liquids
D 1193 Specification for Reagent Water
D 1353 Test Method for Nonvolatile Matter in Volatile Solvents for Use in Paint, Varnish, Lacquer, and Related Products
D 1836 Specification for Commercial Hexanes
3
D 2021 Specification for Neutral Detergent, 40 Percent Alkylbenzene Sulfonate Type
F 302 Practice for Field Sampling of Aerospace Fluids in Containers
6
F 303Practices for SamplingAerospace Fluids from Components Practices for Sampling for Particles inAerospace Fluids and
Components
F 312 Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
3. Terminology Definition
3.1 filtered liquid dispenser—as used in this practice, a dispenser capable of delivering rinse liquid through a filter with pore
size no larger than half the size of the smallest particle being considered for measurement.
4. Significance and Use
4.1 This practice provides for the processing of liquid samples obtained in accordance with Practice F 302 and Practices F 303.
It will provide the optimum sample processing for visual contamination methods such as Method F 312, and Test Method F 314.
5. Apparatus and Materials
5.1 Filtration Funnel—The funnel opening in contact with the membrane shall be approximately 35.0 mm in inside diameter.
The effective area shall be calibrated. If the funnel is to be used for measuring the sample volume, the funnel shall be calibrated
within 62 % of the required volume.
5.2 Membrane Filter Support—Either a fritted-glass, sintered-metal, polyphenyl-sulfone or stainless steel screen may be used.
1
This practice is under the jurisdiction ofASTM Committee E21 on Space Simulation andApplications of Space TechnologiesTechnology and is the direct responsibility
of Subcommittee E21.05 on Contamination.
Current edition approvedApril 10, 1997.May 1, 2008. Published February 1998.May 2008. Originally published as D2391–69. Redesignated F311 approved in 1970.1969.
Last previous edition F311–78(1992). approved in 2002 as F 311 – 97 (2002).
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 05.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Annual Book of ASTM Standards, Vol 06.04.
3
Withdrawn.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F311–08
The support shall be so designed as to enable attachment to a vacuum flask.
5.3 Vacuum Flask.
5.4 Funnel-Holding Device—A provision should be made for the dissipation of static electricity from the funnel.
5.5 A clean bench or hood, supplied with unidirectional flow filtered air, in which uncovered components may be placed.
5.6 Vacuum Source—Minimum vacuum gage reading of 61 kPa (or other metric units acceptable to ASTM).
5.7 Forceps, unserrated tips.
5.8 Filter
...