1、Designation:G9303(Reapproved 2011)Standard Practice forCleaning Methods and Cleanliness Levels for Material andEquipment Used in Oxygen-Enriched Environments1This standard is issued under the fixed designation G93;the number immediately following the designation indicates the year of originaladoptio
2、n or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the selection of methods andapparatus for cleaning materials an
3、d equipment intended forservice in oxygen-enriched environments.Contaminationproblems encountered in the use of enriched air,mixtures ofoxygen with other gases,or any other oxidizing gas may besolved by the same cleaning procedures applicable to mostmetallic and nonmetallic materials and equipment.C
4、leaningexamples for some specific materials,components,andequipment,andthecleaningmethodsforparticularapplications,are given in the appendices.1.2 This practice includes levels of cleanliness used forvarious applications and the methods used to obtain and verifythese levels.1.3 This practice applies
5、 to chemical-,solvent-,andaqueous-based processes.1.4 This practice describes nonmandatory material forchoosing the required levels of cleanliness for systems exposedto oxygen or oxygen-enriched atmospheres.1.5 This practice proposes a practical range of cleanlinesslevels that will satisfy most syst
6、em needs,but it does not dealin quantitative detail with the many conditions that mightdemand greater cleanliness or that might allow greater con-tamination levels to exist.Furthermore,it does not proposespecific ways to measure or monitor these levels from amongthe available methods.1.6 The values
7、stated in both inch-pound and SI units are tobe regarded separately as the standard unit.The values given inparentheses are for information only.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard
8、 to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Federal,state andlocal safety and disposal regulations concerning the particularhazardous materials,reagents,operations,and equipment beingused should be reviewed by the use
9、r.The user is encouraged toobtain the Material Safety Data Sheet(MSDS)from themanufacturer for any material incorporated into a cleaningprocess.Specific cautions are given in Section 8.2.Referenced Documents2.1 ASTM Standards:2A380 Practice for Cleaning,Descaling,and Passivation ofStainless Steel Pa
10、rts,Equipment,and SystemsD1193 Specification for Reagent WaterE312 Practice for Description and Selection of Conditionsfor Photographing Specimens Using Analog(Film)Cam-eras and Digital Still Cameras(DSC)E1235 Test Method for Gravimetric Determination of Non-volatile Residue(NVR)in Environmentally C
11、ontrolledAreas for SpacecraftE2042 Practice for Cleaning and Maintaining ControlledAreas and Clean RoomsF312 Test Methods for Microscopical Sizing and CountingParticles from Aerospace Fluids on Membrane FiltersF331 Test Method for Nonvolatile Residue of Solvent Ex-tract from Aerospace Components(Usi
12、ng Flash Evapora-tor)G63 Guide for Evaluating Nonmetallic Materials for Oxy-gen ServiceG88 Guide for Designing Systems for Oxygen ServiceG121 Practice for Preparation of Contaminated Test Cou-pons for the Evaluation of Cleaning AgentsG122 Test Method for Evaluating the Effectiveness ofCleaning Agent
13、sG125 Test Method for Measuring Liquid and Solid MaterialFire Limits in Gaseous OxidantsG127 Guide for the Selection of Cleaning Agents for Oxy-gen SystemsG128 Guide for Control of Hazards and Risks in OxygenEnriched Systems1This practice is under the jurisdiction of ASTM Committee G04 on Compat-ibi
14、lity and Sensitivity of Materials in Oxygen Enriched Atmospheres and is thedirect responsibility of Subcommittee G04.02 on Recommended Practices.Current edition approved April 1,2011.Published April 2011.Originallyapproved in 1987.Last previous edition approved in 2003 as G93 03e01.DOI:10.1520/G0093
15、-03R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C
16、700,West Conshohocken,PA 19428-2959.United States1 G131 Practice for Cleaning of Materials and Components byUltrasonic TechniquesG136 Practice for Determination of Soluble Residual Con-taminants in Materials by Ultrasonic ExtractionG144 Test Method for Determination of Residual Contami-nation of Materials and Components by Total CarbonAnalysis Using a High Temperature CombustionAnalyzer2.2 CGA Documents:CGA Pamphlet G-4.1 Cleaning Equipment for Oxygen Ser-vice3CGA Pamphlet G-4.4 Industrial Pract
