ASTM G93-03e1

Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments

SIGNIFICANCE AND USE
The purpose of this practice is to furnish qualified technical personnel with pertinent information for the selection of cleaning methods for cleaning materials and equipment to be used in oxygen-enriched environments. This practice furnishes qualified technical personnel with guidance in the specification of oxygen system cleanliness needs. It does not actually specify cleanliness levels.
Insufficient cleanliness of components used in oxygen systems can result in the ignition of contaminants or components by a variety of mechanisms such as particle, mechanical, or pneumatic impact. These mechanisms are explained in detail in Guide G 88.
Adequate contamination control in oxygen systems is imperative to minimize hazards and component failures that can result from contamination. Contamination must also be minimized to ensure an acceptable product purity.  
Removal of contaminants from materials and components depends on system configuration, materials of construction, and type and quantity of contaminant.
Examples of cleaning procedures contained herein may be followed or specified for those materials, components, and equipment indicated. The general cleaning text can be used to establish cleaning procedures for materials, components, equipment, and applications not addressed in detail. See Guide G 127 for discussion of cleaning agent and procedure selection.
SCOPE
1.1 This practice covers the selection of methods and apparatus for cleaning materials and equipment intended for service in oxygen-enriched environments. Contamination problems encountered in the use of enriched air, mixtures of oxygen with other gases, or any other oxidizing gas may be solved by the same cleaning procedures applicable to most metallic and nonmetallic materials and equipment. Cleaning examples for some specific materials, components, and equipment, and the cleaning methods for particular applications, are given in the appendices.
1.2 This practice includes levels of cleanliness used for various applications and the methods used to obtain and verify these levels.
1.3 This practice applies to chemical-, solvent-, and aqueous-based processes.
1.4 This practice describes nonmandatory material for choosing the required levels of cleanliness for systems exposed to oxygen or oxygen-enriched atmospheres.
1.5 This practice proposes a practical range of cleanliness levels that will satisfy most system needs, but it does not deal in quantitative detail with the many conditions that might demand greater cleanliness or that might allow greater contamination levels to exist. Furthermore, it does not propose specific ways to measure or monitor these levels from among the available methods.
1.6 The values stated in both inch-pound and SI units are to be regarded separately as the standard unit. The values given in parentheses are for information only.
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. Federal, state and local safety and disposal regulations concerning the particular hazardous materials, reagents, operations, and equipment being used should be reviewed by the user. The user is encouraged to obtain the Material Safety Data Sheet (MSDS) from the manufacturer for any material incorporated into a cleaning process. Specific cautions are given in Section .

General Information

• Status: Historical
• Publication Date: 31-Oct-2003
• Technical Committee: G04 - Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
• Drafting Committee: G04.02 - Recommended Practices

Relations

• Replaces: ASTM G93-96 - Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• Effective Date: 01-Nov-2003
• Replaced By: ASTM G93-03(2011) - Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• Effective Date: 01-Apr-2011
• Referred By: ASTM G63-15(2023) - Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service
• Effective Date: 01-Nov-2003
• Referred By: ASTM E3346-22 - Standard Guide for Combustion, Inert Gas Fusion and Hot Extraction Instruments for use in Analyzing Metals, Ores, and Related Materials
• Effective Date: 01-Nov-2003
• Referred By: ASTM G74-13(2021) - Standard Test Method for Ignition Sensitivity of Nonmetallic Materials and Components by Gaseous Fluid Impact
• Effective Date: 01-Nov-2003
• Referred By: ASTM G126-16(2023) - Standard Terminology Relating to the Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
• Effective Date: 01-Nov-2003
• Referred By: ASTM G175-13(2021) - Standard Test Method for Evaluating the Ignition Sensitivity and Fault Tolerance of Oxygen Pressure Regulators Used for Medical and Emergency Applications
• Effective Date: 01-Nov-2003
• Referred By: ASTM G120-15(2023) - Standard Practice for Determination of Soluble Residual Contamination by Soxhlet Extraction
• Effective Date: 01-Nov-2003
• Referred By: ASTM G88-21 - Standard Guide for Designing Systems for Oxygen Service
• Effective Date: 01-Nov-2003
• Referred By: ASTM G127-15(2023) - Standard Guide for the Selection of Cleaning Agents for Oxygen-Enriched Systems
• Effective Date: 01-Nov-2003
• Referred By: ASTM F1792-97(2021) - Standard Specification for Special Requirements for Valves Used in Gaseous Oxygen Service
• Effective Date: 01-Nov-2003
• Referred By: ASTM G128/G128M-15(2023) - Standard Guide for Control of Hazards and Risks in Oxygen Enriched Systems
• Effective Date: 01-Nov-2003
• Referred By: ASTM F307-13(2020) - Standard Practice for Sampling Pressurized Gas for Gas Analysis
• Effective Date: 01-Nov-2003
• Referred By: ASTM G124-18 - Standard Test Method for Determining the Combustion Behavior of Metallic Materials in Oxygen-Enriched Atmospheres
• Effective Date: 01-Nov-2003
• Referred By: ASTM G94-22 - Standard Guide for Evaluating Metals for Oxygen Service
• Effective Date: 01-Nov-2003

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
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Designation: G93 – 03
Standard Practice for
Cleaning Methods and Cleanliness Levels for Material and
1
Equipment Used in Oxygen-Enriched Environments
ThisstandardisissuedunderthefixeddesignationG93;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
´ NOTE—Section 8.3.7 was corrected editorially in July 2004.
1. Scope hazardousmaterials,reagents,operations,andequipmentbeing
used should be reviewed by the user.The user is encouraged to
1.1 This practice covers the selection of methods and
obtain the Material Safety Data Sheet (MSDS) from the
apparatus for cleaning materials and equipment intended for
manufacturer for any material incorporated into a cleaning
service in oxygen-enriched environments. Contamination
process. Specific cautions are given in Section 8.
problems encountered in the use of enriched air, mixtures of
oxygen with other gases, or any other oxidizing gas may be
2. Referenced Documents
solved by the same cleaning procedures applicable to most
2
2.1 ASTM Standards:
metallic and nonmetallic materials and equipment. Cleaning
A380 Practice for Cleaning, Descaling, and Passivation of
examples for some specific materials, components, and equip-
Stainless Steel Parts, Equipment, and Systems
ment, and the cleaning methods for particular applications, are
D1193 Specification for Reagent Water
given in the appendices.
E312 Practice for Description and Selection of Conditions
1.2 This practice includes levels of cleanliness used for
for Photographing Specimens Using Analog (Film) Cam-
various applications and the methods used to obtain and verify
eras and Digital Still Cameras (DSC)
these levels.
E1235 Test Method for Gravimetric Determination of Non-
1.3 This practice applies to chemical-, solvent-, and
volatile Residue (NVR) in Environmentally Controlled
aqueous-based processes.
Areas for Spacecraft
1.4 This practice describes nonmandatory material for
E2042 Practice for Cleaning and Maintaining Controlled
choosingtherequiredlevelsofcleanlinessforsystemsexposed
Areas and Clean Rooms
to oxygen or oxygen-enriched atmospheres.
F312 Test Methods for Microscopical Sizing and Counting
1.5 This practice proposes a practical range of cleanliness
Particles from Aerospace Fluids on Membrane Filters
levels that will satisfy most system needs, but it does not deal
F331 Test Method for Nonvolatile Residue of Solvent
in quantitative detail with the many conditions that might
Extract from Aerospace Components (Using Flash Evapo-
demand greater cleanliness or that might allow greater con-
rator)
tamination levels to exist. Furthermore, it does not propose
G63 Guide for Evaluating Nonmetallic Materials for Oxy-
specific ways to measure or monitor these levels from among
gen Service
the available methods.
G88 Guide for Designing Systems for Oxygen Service
1.6 The values stated in both inch-pound and SI units are to
G121 Practice for Preparation of Contaminated Test Cou-
beregardedseparatelyasthestandardunit.Thevaluesgivenin
pons for the Evaluation of Cleaning Agents
parentheses are for information only.
G122 Test Method for Evaluating the Effectiveness of
1.7 This standard does not purport to address all of the
Cleaning Agents
safety concerns, if any, associated with its use. It is the
G125 TestMethodforMeasuringLiquidandSolidMaterial
responsibility of the user of this standard to establish appro-
Fire Limits in Gaseous Oxidants
priate safety and health practices and determine the applica-
G127 Guide for the Selection of Cleaning Agents for
bility of regulatory limitations prior to use. Federal, state and
Oxygen Systems
local safety and disposal regulations concerning the particular
G128 Guide for Control of Hazards and Risks in Oxygen
Enriched Systems
1
This practice is under the jurisdiction of ASTM Committee G04 on Compat-
ibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and is the
direct responsibility of Subcommittee G04.02 on Recommended Practices.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2003. Published December 2003. Originally
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1987. Last previous edition approved in 1996 as G93 – 96. DOI:
Standards volume information, refer to the standard’s Document Summary page on
10.1520/G0093-03E01.
the ASTM website.
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G93–03
G131 Practice for Cleaning of Materials and Components 3.2 D
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