ASTM G131-96(2008)

Standard Practice for Cleaning of Materials and Components by Ultrasonic Techniques

SIGNIFICANCE AND USE
This practice is suitable for the removal of contaminants found on materials, parts, and components used in systems requiring a high level of cleanliness, such as oxygen. Parts shall have been precleaned to remove visible contaminants prior to using this procedure. Softgoods such as seals and valve seats may be cleaned without precleaning.
This procedure may also be used as the cleanliness verification technique for coupons used during cleaning effectiveness tests as in Test Method G 122.
The cleaning efficiency has been shown to vary with the frequency and power density of the ultrasonic unit. Low frequencies in the 20 to 25 kilohertz range have been found to damage soft metals such as aluminum and silver. Therefore, the specifications of the unit and the frequencies available must be considered in order to optimize the cleaning conditions without damaging the parts.
SCOPE
1.1 This practice covers a procedure for the cleaning of materials and components used in systems requiring a high level of cleanliness, such as oxygen, by ultrasonic techniques.
1.2 This practice may be used for cleaning small parts, components, softgoods, etc.
1.3 The values stated in SI units are standard.
1.4 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. Specific precautionary statements are given in Note 1.

General Information

• Status: Historical
• Publication Date: 31-Aug-2008
• ICS: 03.080.10 - Maintenance services. Facilities management
• Technical Committee: G04 - Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
• Drafting Committee: G04.02 - Recommended Practices

Relations

• Replaces: ASTM G131-96(2002) - Standard Practice for Cleaning of Materials and Components by Ultrasonic Techniques
• Effective Date: 01-Sep-2008
• Replaced By: ASTM G131-96(2016) - Standard Practice for Cleaning of Materials and Components by Ultrasonic Techniques
• Effective Date: 01-May-2016
• Referred By: ASTM F3127-22 - Standard Guide for Validating Cleaning Processes Used During the Manufacture of Medical Devices
• Effective Date: 01-Sep-2008
• Referred By: ASTM G126-16(2023) - Standard Terminology Relating to the Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
• Effective Date: 01-Sep-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-Sep-2008
• Referred By: ASTM G93/G93M-19 - Standard Guide for Cleanliness Levels and Cleaning Methods for Materials and Equipment Used in Oxygen-Enriched Environments
• Effective Date: 01-Sep-2008
• Referred By: ASTM G144-01(2022) - Standard Test Method for Determination of Residual Contamination of Materials and Components by Total Carbon Analysis Using a High Temperature Combustion Analyzer
• Effective Date: 01-Sep-2008
• Referred By: ASTM F2847-17 - Standard Practice for Reporting and Assessment of Residues on Single-Use Implants and Single-Use Sterile Instruments
• Effective Date: 01-Sep-2008
• Referred By: ASTM F2459-18 - Standard Test Method for Extracting Residue from Metallic Medical Components and Quantifying via Gravimetric Analysis
• Effective Date: 01-Sep-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: G131 − 96(Reapproved2008)
Standard Practice for
Cleaning of Materials and Components by Ultrasonic
1
Techniques
This standard is issued under the fixed designation G131; 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 pons for the Evaluation of Cleaning Agents
G122Test Method for Evaluating the Effectiveness of
1.1 This practice covers a procedure for the cleaning of
Cleaning Agents
materials and components used in systems requiring a high
level of cleanliness, such as oxygen, by ultrasonic techniques.
3. Terminology
1.2 This practice may be used for cleaning small parts,
3.1 Definitions of Terms Specific to This Standard:
components, softgoods, etc.
3.1.1 contaminant (contamination), n—unwantedmolecular
1.3 The values stated in SI units are standard.
and particulate matter that could affect or degrade the perfor-
1.4 This standard does not purport to address all of the
mance of the components upon which they reside.
safety concerns, if any, associated with its use. It is the
3.1.2 contaminate, v—a process of applying a contaminant.
responsibility of the user of this standard to establish appro-
3.1.3 control coupon (witness coupon), n—a coupon made
priate safety and health practices and determine the applica-
from the same material and prepared in exactly the same way
bility of regulatory limitations prior to use. Specific precau-
as the test coupons, which is used to verify the validity of the
tionary statements are given in Note 1.
method or part thereof.
2. Referenced Documents
3.1.3.1 Discussion—Inthispractice,thecontrolcouponwill
2
be contaminated in the same manner as the test coupons and
2.1 ASTM Standards:
will be subjected to the identical cleaning procedure.
D1193Specification for Reagent Water
E1235Test Method for Gravimetric Determination of Non-
3.1.4 degas, v—theprocessofremovinggasesfromaliquid.
volatile Residue (NVR) in Environmentally Controlled
3.1.5 nonvolatile residue (NVR), n—residual molecular and
Areas for Spacecraft
particulate matter remaining following the filtration and con-
F311Practice for ProcessingAerospace Liquid Samples for
trolled evaporation of a solvent containing contaminants.
Particulate ContaminationAnalysis Using Membrane Fil-
3.1.6 particle (particulate contaminant), n—a piece of mat-
ters
terinasolidstatewithobservablelength,width,andthickness.
F324Test Method for Nonvolatile Residue of Volatile
3.1.6.1 Discussion—The size of a particle is usually defined
Cleaning Solvents Using the Solvent Purity Meter (With-
3
by its greatest dimension and is specified in micrometres.
drawn 1987)
F331Test Method for Nonvolatile Residue of Solvent Ex-
4. Summary of Practice
tract fromAerospace Components (Using Flash Evapora-
tor)
4.1 A part, material or component is placed in a container
G121Practice for Preparation of Contaminated Test Cou-
containing the cleaning agent. This container is then placed in
an ultrasonic cleaner and treated for a given period of time at
the recommended temperature for the cleaning agent. This
1
This practice is under the jurisdiction of ASTM Committee G04 on Compat-
results in a solution if the contaminant is soluble in the test
ibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and is the
direct responsibility of Subcommittee G04.02 on Recommended Practices. fluid or a emulsion if the contaminant is not soluble in the test
Current edition approved Sept. 1, 2008. Published October 2008. Originally
fluid. The cleaning solution combined with the rinse solutions
approved in 1995. Last previous edition approved in 2002 as G131–96(2002).
may then be analyzed for particulate, NVR, or total carbon
DOI: 10.1520/G0131-96R08.
2 (TC).
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.1.1 In the case of aqueous based agents, the parts are
Standards volume information, refer to the standard’s Document Summary page on
rinsed after the removal from the cleaning bath and ultrasoni-
the ASTM website.
3
cally cleaned in reagent water to provide a solution for TC
The last approved version of this historical standard is referenced on
www.astm.org. analysis using G TC.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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G131 − 96(2008)
4
4.1.2 Inthecaseofsolventbasedagents,thepartsarerinsed such specifications are available. Other grades may be used,
with fresh solvent, which is collected and combined with the provid
...

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:G131–96 (Reapproved 2002) Designation:G131–96 (Reapproved 2008)
Standard Practice for
Cleaning of Materials and Components by Ultrasonic
1
Techniques
This standard is issued under the fixed designation G 131; 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 a procedure for the cleaning of materials and components used in systems requiring a high level of
cleanliness, such as oxygen, by ultrasonic techniques.
1.2 This practice may be used for cleaning small parts, components, softgoods, etc.
1.3 The values stated in SI units are standard.
1.4 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. Specific precautionary statements are given in Note 1.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1193 Specification for Reagent Water
E 1235 Practices Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled
Areas for Spacecraft
F311 Practice for Processing Aerospace Liquid Samples for Particulate Contamination Analysis Using Membrane Filters
3
F 324 Test Method for Nonvolatile Residue of Volatile Cleaning Solvents Using the Solvent Purity Meter
F 331 Test Method for Nonvolatile Residue of Halogenated Solvent Extract fromAerospace Components (Using Rotary Flash
Evaporator)
G 121 Practice for the Preparation of Contaminated Test Coupons for the Evaluation of Cleaning Agents
G 122 Test Method to Evaluatefor Evaluating the Effectiveness of Cleaning Agents
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 contaminant (contamination), n—unwanted molecular and particulate matter that could affect or degrade the performance
of the components upon which they reside.
3.1.2 contaminate, v—a process of applying a contaminant.
3.1.3 control coupon (witness coupon), n— a coupon made from the same material and prepared in exactly the same way as
the test coupons, which is used to verify the validity of the method or part thereof.
3.1.3.1 Discussion—In this practice, the control coupon will be contaminated in the same manner as the test coupons and will
be subjected to the identical cleaning procedure.
3.1.4 degas, v—the process of removing gases from a liquid.
3.1.5 nonvolatile residue (NVR), n—residual molecular and particulate matter remaining following the filtration and controlled
evaporation of a solvent containing contaminants.
3.1.6 particle (particulate contaminant), n— a piece of matter in a solid state with observable length, width, and thickness.
3.1.6.1 Discussion—The size of a particle is usually defined by its greatest dimension and is specified in micrometres.
4. Summary of Practice
4.1 A part, material or component is placed in a container containing the cleaning agent. This container is then placed in an
1
This practice is under the jurisdiction of ASTM Committee G4 G04 on Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and is the direct
responsibility of Subcommittee G04.02 on Recommended Practices .
Current edition approved March 10, 1996. Published August 1996. Originally published as G131–95. Last previous edition G131–95.
Current edition approved Sept. 1, 2008. Published October 2008. Originally approved in 1995. Last previous edition approved in 2002 as G 131 – 95(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 11.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn. The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
G131–96 (2008)
ultrasonic cleaner and treated for a given period of time at the recommended temperature for the cleaning agent. This results in
a solution if the contaminant is soluble in the test fluid or a emulsion if the contaminant is not soluble in the test fluid.The cleaning
solu
...