ASTM_G_126_-_16.pdf

Designation:G12616Standard 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 NonmetallicMaterials and Components by Gaseous 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 OxidantsG128 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:aging,nthe exposure of a material to stress,such stress ofwhich may include time,pressure,temperature,abrasion,ionizing radiation,light,impact with gas or particles,tensileor compressive force(either static or cyclic),or any otherfeature that may be present individually or in combination.G114accelerated aging,na type of artificial aging whereby theeffect of prolonged exposure during service is stimulated byaging at elevated temperature.G114artificial aging,naging in which a stress variable is outsidethe domain of exposure that a material might see in acomponent for oxygen service or in which an alternativemechanism is used to produce an effect that simulates theresults of natural aging.1This terminology is under the jurisdiction of ASTM Committee G04 onCompatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and isthe direct responsibility of Subcommittee G04.02 on Recommended Practices.Current edition approved Dec.15,2016.Published January 2017.Originallyapproved in 1994.Last previous edition approved in 2008 as G126 00(2008).DOI:10.1520/G0126-16.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 DISCUSSIONThe degree of artificiality may vary on a large scale.Anexample of mild artificiality is exposure of a material to a greaterpressure than it experiences in the use condition.An example ofextreme artificiality is the use of sandpaper to increase a materialssurface roughness to simulate particle-impact abrasion that occurs inthe use condition.A high degree of artificiality affects the stre