1、Designation:G72/G72M15Standard Test Method forAutogenous Ignition Temperature of Liquids and Solids in aHigh-Pressure Oxygen-Enriched Environment1This standard is issued under the fixed designation G72/G72M;the number immediately following the designation indicates the yearof original adoption or,in
2、 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.Scope1.1 This test method covers the determination of the tem-perature at which liquids and solid
3、s will spontaneously ignite.These materials must ignite without application of spark orflame in a high-pressure oxygen-enriched environment.1.2 This test method is intended for use at pressures of 2.1to 20.7 MPa 300 to 3000 psi.The pressure used in thedescription of the method is 10.3 MPa 1500 psi,a
4、nd isintended for applicability to high pressure conditions.The testmethod,as described,is for liquids or solids with ignitiontemperature in the range from 60 to 500 C 140 to 932 F.NOTE1Test Method G72/G72M normally utilizes samples of ap-proximately 0.20+/-0.03-g mass,a starting pressure of 10.3 MP
5、a1500 psi and a temperature ramp rate of 5 C min.However,Autog-enous Ignition Temperatures(AIT)can also be obtained under other testconditions.Testing experience has shown that AIT testing of volatileliquids can be influenced by the sample pre-conditioning and the samplemass.This will be addressed i
6、n the standard as Special Case 1 insubsection 8.2.2.Testing experience has also shown that AIT testing ofsolid or non-volatile liquid materials at low pressures(i.e.,2.1 MPa)canbe significantly influenced by the sample mass and the temperature ramprate.This will be addressed in the standard as Speci
7、al Case 2,insubsection 8.2.3.Since the AIT of a material is dependent on the samplemass/configuration and test conditions,any departure from the standardconditions normally used for Test Method G72/G72M testing should beclearly indicated in the test report.1.3 This test method is for high-pressure p
8、ure oxygen.Thetest method may be used in atmospheres from 0.5%to 100%oxygen.1.4 An apparatus suitable for these requirements is de-scribed.This test method could be applied to higher pressuresand materials of higher ignition temperature.If more severerequirements or other oxidizers than those descri
9、bed aredesired,care must be taken in selecting an alternative safeapparatus capable of withstanding the conditions.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem s
10、hall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 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 to establish appro-p
11、riate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlabor
12、atory Study toDetermine the Precision of a Test MethodG93 Practice for Cleaning Methods and Cleanliness Levelsfor Material and Equipment Used in Oxygen-EnrichedEnvironments2.2 Federal Specification:BB-O-925 Oxygen,Technical,Gas and Liquid32.3 Other Documents:MNL 36 Safe Use of Oxygen and Oxygen Syst
13、ems:Guide-lines for Oxygen System Design,Materials,Selection,Operations,Storage,and Transportation4Compressed Gas Association Booklets G-1 and G-4.153.Summary of Test Method3.1 This autogenous ignition temperature test method isdesigned to expose solid or liquid sample material to increasingtemperat
14、ure in a high-pressure reaction vessel.The reaction1This test method is under the jurisdiction of ASTM Committee G04 onCompatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and isthe direct responsibility of Subcommittee G04.01 on Test Methods.Current edition approved Oct.1,2015.
15、Published October 2015.Originallyapproved in 1982.Last previous edition approved in 2009 as G72/G72M 09.DOI:10.1520/G0072_G0072M-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informatio
16、n,refer to the standards Document Summary page onthe ASTM website.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.4ASTM Manual Series,Available from ASTM International,100 Barr HarborDrive,W.Conshohocken,PA 19428.5Available from Compressed Gas Association(CGA),4221 Walney Rd.,5thFloor,Chantilly,VA 20151-2923,http:/.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshoho