ASTM G127-95(2008)
(Guide)Standard Guide for the Selection of Cleaning Agents for Oxygen Systems
Standard Guide for the Selection of Cleaning Agents for Oxygen Systems
SIGNIFICANCE AND USE
The purpose of this guide is to provide information that may be considered when selecting and qualifying a cleaning agent for an oxygen system.
Insufficient cleanliness can result in the ignition of contaminants or components by a variety of mechanisms. Therefore, an acceptable level of contamination for each condition of use in oxygen service should be defined. The acceptable level of contamination may depend on various factors, such as:
The nature and type of the contaminants,
The location and degree of contamination,
The type of substrate material,
The configuration and end use of the equipment or part to be cleaned, and
The operating parameters of the oxygen system (pressure, temperature, phase, concentration, fluid velocity, etc.).
SCOPE
1.1 The purpose of this guide is to establish a procedure to select cleaning agents, both solvents and water-based detergents, for oxygen service. This includes of laboratory-scale tests for cleaning effectiveness, materials compatibility and oxygen compatibility.
1.2 The effectiveness of a particular cleaning agent depends upon the method by which it is used, the nature and type of the contaminants, and the characteristics of the article being cleaned, such as size, shape, and material. Final evaluation of the cleaning agent should include testing of actual products and production processes.
1.3 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
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: G127 − 95 (Reapproved2008)
Standard Guide for the
Selection of Cleaning Agents for Oxygen Systems
This standard is issued under the fixed designation G127; 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 Seals--Compatibility with Service Fluids (Withdrawn
1993)
1.1 The purpose of this guide is to establish a procedure to
D4809 Test Method for Heat of Combustion of Liquid
select cleaning agents, both solvents and water-based
Hydrocarbon Fuels by Bomb Calorimeter (Precision
detergents, for oxygen service. This includes of laboratory-
Method)
scale tests for cleaning effectiveness, materials compatibility
G5 Reference Test Method for Making Potentiostatic and
and oxygen compatibility.
Potentiodynamic Anodic Polarization Measurements
1.2 The effectiveness of a particular cleaning agent depends
G31 PracticeforLaboratoryImmersionCorrosionTestingof
upon the method by which it is used, the nature and type of the
Metals
contaminants, and the characteristics of the article being
G59 Test Method for Conducting Potentiodynamic Polariza-
cleaned, such as size, shape, and material. Final evaluation of
tion Resistance Measurements
thecleaningagentshouldincludetestingofactualproductsand
G63 Guide for Evaluating Nonmetallic Materials for Oxy-
production processes.
gen Service
1.3 This standard does not purport to address all of the G72 Test Method for Autogenous Ignition Temperature of
safety concerns, if any, associated with its use. It is the
Liquids and Solids in a High-Pressure Oxygen-Enriched
responsibility of the user of this standard to establish appro- Environment
priate safety and health practices and determine the applica-
G74 Test Method for Ignition Sensitivity of Materials to
bility of regulatory limitations prior to use. Gaseous Fluid Impact
G93 Practice for Cleaning Methods and Cleanliness Levels
2. Referenced Documents
for Material and Equipment Used in Oxygen-Enriched
Environments
2.1 ASTM Standards:
G94 Guide for Evaluating Metals for Oxygen Service
D471 Test Method for Rubber Property—Effect of Liquids
G121 Practice for Preparation of Contaminated Test Cou-
D543 Practices for Evaluating the Resistance of Plastics to
pons for the Evaluation of Cleaning Agents
Chemical Reagents
G122 Test Method for Evaluating the Effectiveness of
D1193 Specification for Reagent Water
Cleaning Agents
D1460 Test Method for Rubber Property—Change in
2.2 CGA Document:
Length During Liquid Immersion
CGA Pamphlet G-4.1 Cleaning Equipment for Oxygen Ser-
D2512 Test Method for Compatibility of Materials with
vice
Liquid Oxygen (Impact Sensitivity Threshold and Pass-
Fail Techniques)
3. Significance and Use
D2863 Test Method for Measuring the Minimum Oxygen
Concentration to Support Candle-Like Combustion of
3.1 The purpose of this guide is to provide information that
Plastics (Oxygen Index)
may be considered when selecting and qualifying a cleaning
D2934 Test Method for Compatibility ofVulcanized Rubber
agent for an oxygen system.
3.2 Insufficient cleanliness can result in the ignition of
contaminants or components by a variety of mechanisms.
This guide is under the jurisdiction ofASTM Committee G04 on Compatibility
Therefore, an acceptable level of contamination for each
and Sensitivity of Materials in Oxygen Enriched Atmospheres and is the direct
condition of use in oxygen service should be defined. The
responsibility of Subcommittee G04.02 on Recommended Practices.
Current edition approved April 1, 2008. Published July 2008. Originally
acceptable level of contamination may depend on various
approved in 1995. Last previous edition approved in 2000 as G127 – 95 (2000).
factors, such as:
DOI: 10.1520/G0127-95R08.
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
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
G127 − 95 (2008)
3.2.1 The nature and type of the contaminants, 5.3.2.1 Ethylene Propylene Rubber (EPDM),
R R
3.2.2 The location and degree of contamination,
5.3.2.2 Perfluoroelastomer (Kalrez , Chemraz ),
R
3.2.3 The type of substrate material,
5.3.2.3 PCTFE, Polychlorotrifluoroethylene (Kel-F ),
3.2.4 Theconfigurationandenduseoftheequipmentorpart
5.3.2.4 Chloroprene Rubber (Neoprene),
to be cleaned, and
5.3.2.5 Polyamid Polymer (Nylon),
3.2.5 The operating parameters of the oxygen system R
5.3.2.6 PTFE, Polytetrafluoroethylene (Teflon ), and
(pressure, temperature, phase, concentration, fluid velocity,
R
5.3.2.7 Fluoroelastomer (Viton A, Fluorel).
etc.).
6. Cleaning Effectiveness Tests
4. Selection of Cleaning Agent
6.1 Selection of Test Contaminants:
4.1 Before a specific cleaning agent is selected for testing,
6.1.1 Numerous contaminants encountered in oxygen sys-
the following attributes should be considered.
tems that could result from manufacturing, assembly,
4.1.1 Toxicity,
fabrication, and construction processes are listed in Practice
4.1.2 Carcinogenicity,
G93. Typical contaminants include:
4.1.3 Recyclability,
4.1.4 Waste disposal, 6.1.1.1 Hydrocarbon oils and greases,
4.1.5 Ozone depletion, 6.1.1.2 Fluorinated fluids and greases,
4.1.6 Inertness (flammability and combustibility),
6.1.1.3 Inks,
4.1.7 Corrosivity and compatibility with metallic and non-
6.1.1.4 Machine cutting oils,
metallic engineering materials,
6.1.1.5 Carbon deposits,
4.1.8 Availability and technical support from supplier,
6.1.1.6 Silicone oils and greases,
4.1.9 Cost effectiveness, and
6.1.1.7 Phosphate esters,
4.1.10 Compliance with local, state and federal regulations.
6.1.1.8 Waxes,
4.2 Itisdesirablethatthecleaningagentcouldbeappliedby
6.1.1.9 Dye penetrants,
a variety of methods, such as wiping, immersion, spraying, etc.
6.1.1.10 Chlorotrifluoroethylene based oils and greases.
Consequently, the cleaning agent manufacturer’s instructions
6.1.2 Among typical contaminants, hydrocarbons are the
for applying the cleaner shall be considered.
primecandidatesforthetestprotocol.Whendealingwithother
contaminants, the user should attempt to classify the type of
5. Selection of Substrate Materials
contamination expected on the equipment to be cleaned.
5.1 Substrate materials used for cleaning effectiveness and
6.1.3 As a preliminary test, a mixture of common cutting
compatibilitytestsshouldberepresentativeofthoseusedinthe
oils may be used as a contaminant. It may be carried in a
end application.
suitable volatile solvent as a means to introduce it into a
5.2 Metallic Materials:
system. In addition, vacuum pump oil, or a compressor oil are
5.2.1 Metallic materials commonly used in oxygen systems suggested as contaminants for the evaluation program. In a
are listed in Guide G94.
more refined test at later stages, fluorinated oils/greases, dye
5.2.2 Alloys representative of numerous applications in penetrants, or a mixture of as many contaminants as necessary
oxygen systems and suitable for inclusion in a test protocol are
may be prepared in a suitable solvent. Eventually, actual
as follows:
contaminants encountered on an engineering component or
5.2.2.1 304 stainless steel,
system for oxygen service shall be evaluated for removal
5.2.2.2 Aluminum alloy 6061 (or 5051),
efficiency.
5.2.2.3 Carbon steel 1018,
6.2 Test Methods:
5.2.2.4 Admiralty brass CDA 443,
6.2.1 A suggested starting level of contamination is 1000
5.2.2.5 Monel 400,
mg/m . This is a hydrocarbon level that is consistent with
5.2.2.6 4130X low alloy steel,
contamination levels associated with final cleaning and it is
5.2.2.7 Inconel 718,
twice the acceptable level specified for oxygen service in CGA
5.2.2.8 Copper,
pamphlet G-4.1. Heavily contaminated surfaces with levels in
5.2.2.9 Tin-bronze, and
excess of 1000 mg/m must be precleaned using more aggres-
5.2.2.10 Cobalt alloy 188.
sive cleaning agents with mechanical scrubbing (Practice
5.3 Nonmetallic Materials:
G93). Precleaning is not a cleaning step with which this guide
5.3.1 Nonmetallic materials commonly used in oxygen
is concerned.
service are discussed in Guide G63.
6.2.2 Contaminants may be applied to the specimens by any
5.3.2 Nonmetallic materials representative of numerous ap-
of the means specified in Practice G121.
plications in oxygen systems and suitable for inclusion in a test
6.2.3 The cleaning effectiveness of a cleaning agent shall be
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.