1、Designation:D821121Standard Test Method forHot Surface Ignition Temperature of Gases on Flat Surface1This standard is issued under the fixed designation D8211;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.
2、A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers a means for the discriminationbetween gases,which will ignite or not ignite when impingedon a hot surface when t
3、hat surface is heated to 800 C(1472 F)or greater for a period of 2 min in a non-confinedenvironment.1.2 This test method may be applied to any non-pyrophoricsubstance that is a gas or liquefied gas,particularly GHScategory 1B gases,at ambient temperature and pressure.1.3 This test method should be u
4、sed subject to the limita-tions that no single fire hazard property such as flash point,auto-ignition temperature(AIT),or the performance under theconditions of the present method shall be used to describe orappraise the fire hazard or fire risk of a material,product,assembly,or system under actual
5、fire conditions.Fire hazardproperties measured under controlled laboratory conditionsmay nevertheless be employed to describe properly the re-sponse of materials,products,assemblies,or systems undersaid controlled conditions.Properties measured under con-trolled laboratory conditions may be used as
6、elements ofhazard or risk assessment only when such assessments takesinto account all of the factors that are pertinent to the evolutionof the fire hazard of a given situation.1.4 This standard is used to provide a quantitative measureof a gass or liquefied gass realistic surface ignition tempera-tu
7、re in a non-quiescent environment.1.5 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.6 This standard does not purport to address all of thesafety concerns,if any,associated
8、with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific hazard statements,see Section 9.1.7 This international standard was developed in
9、accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 AST
10、M Standards:2D4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsE659 Test Method for Autoignition Temperature of Chemi-cals3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this method,refer toTerminology D4175.3.2 Definitions of Terms Specific to This Stand
11、ard:3.2.1 auto ignition temperature(AIT),nthe lowest tem-perature at which a substance spontaneously ignites in normalatmosphere without an external source of ignition.3.2.2 camera,ncapable of recording at least 30 frames persecond.3.2.3 chimney,na quartz cylinder tube with the followingdimensions:l
12、ength:229 mm 6 10 mm(9.02 in.6 0.39 in.);inner dimension:70 mm 6 5 mm(2.76 in.6 0.2 in.).3.2.4 environmental chamber,na chamber capable ofproviding a draft-free environment during testing and able toprovide ventilation after testing is completed;the chamberneeds to be able to completely remove the t
13、est substance andany potential substance decomposition products after testinghas completed.3.2.5 gap height,nthe height of the chimney above theinsulation and planchet shall be 4 mm.3.2.6 heating element,na unit that is capable of heating asurface in contact with the planchet up to temperatures of a
14、tleast 800 C(1472 F)up to 1000 C(1832 F).1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.L0.07 on Engineering Sciences of High Performance Fluids andSolids(Formally D02.1100).Curren
15、t edition approved May 1,2021.Published July 2021.Originally approvedin 2018.Last previous edition approved in 2018 as D8211 18.DOI:10.1520/D8211-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards
16、volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright 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 t