ASTM_G_126_-_00_2008.pdf

Designation:G12600(Reapproved 2008)Standard Terminology Relating to theCompatibility and Sensitivity of Materials in OxygenEnriched Atmospheres1This standard is issued under the fixed designation G126;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This terminology defines terms related to the compat-ibility and sensitivity of materials in oxygen enriched atmo-spheres.It includes those standards under the jurisdiction ofASTM Committee G04.1.2 The terminology concentrates on terms commonly en-countered in and specific to practices and methods used toevaluate the compatibility and sensitivity of materials inoxygen.This evaluation is usually performed in a laboratoryenvironment,and this terminology does not attempt to includelaboratory terms.2.Referenced Documents2.1 ASTM Standards:2D2863 Test Method for Measuring the Minimum OxygenConcentration to Support Candle-Like Combustion ofPlastics(Oxygen Index)G63 Guide for Evaluating Nonmetallic Materials for Oxy-gen ServiceG72 Test Method for Autogenous Ignition Temperature ofLiquids and Solids in a High-Pressure Oxygen-EnrichedEnvironmentG74 Test Method for Ignition Sensitivity of Materials toGaseous Fluid ImpactG86 Test Method for Determining Ignition Sensitivity ofMaterials to Mechanical Impact in Ambient Liquid Oxy-gen and Pressurized Liquid and Gaseous Oxygen Envi-ronmentsG88 Guide for Designing Systems for Oxygen ServiceG93 Practice for Cleaning Methods and Cleanliness Levelsfor Material and Equipment Used in Oxygen-EnrichedEnvironmentsG94 Guide for Evaluating Metals for Oxygen ServiceG114 Practices for Evaluating the Age Resistance of Poly-meric Materials Used in Oxygen ServiceG120 Practice for Determination of Soluble Residual Con-tamination by Soxhlet ExtractionG121 Practice for Preparation of Contaminated Test Cou-pons for the Evaluation of Cleaning AgentsG122 Test Method for Evaluating the Effectiveness ofCleaning AgentsG124 Test Method for Determining the Combustion Behav-ior of Metallic Materials in Oxygen-Enriched Atmo-spheresG125 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 SystemsG131 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 CombustionAnalyzerG145 Guide for Studying Fire Incidents in Oxygen Systems3.Terminology3.1 Definitions:autoignition temperature(AIT),n the lowest temperatureat which a material will spontaneously ignite in an oxygen-enriched atmosphere under specific test conditions.G63,G72,G94,G128contaminant,nunwanted molecular or particulate matterthat could adversely affect or degrade the operation,life,orreliability of the systems or components upon which itresides.G93,G120,G121,G131,G136,G144contaminate,vto make unfit for use,either intentionally orunintentionally,by introduction of a contaminant.G131,G1361This terminology is under the jurisdiction of ASTM Committee G04 onCompatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and isthe direct responsibility of Subcommittee G04.03 on Terminology.Current edition approved April 1,2008.Published May 2008.Originallyapproved in 1994.Last previous edition approved in 2000 as G126 00.DOI:10.1520/G0126-00R08.2For 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 C700,West Conshohocken,PA 19428-2959.United States1 contamination,n(1)the amount of unwanted molecular orparticulate matter in a system;(2)the process or condition ofbeing contaminated.DISCUSSIONContamination and cleanliness are opposing properties:increasing cleanliness implies decreasing contamination.G93,G120,G121,G131,G136,G144control coupon(also witness coupon),n(1)a coupon madefrom the same material and prepared in exactly the same wayas the test coupons which is used to verify the validity of themethod or part thereof(G120,G131);(2)a coupon madefrom the same material as the test coupons but in this testmethod is not coated with the contaminant(G121).DISCUSSION(1)in this practice,the control coupon is contaminatedin the same manner as the test coupons and is subjected to the identicalextraction procedure(G120);(2)in this practice,the control coupon iscontaminated in the same manner as the test coupons