1、Designation:E1603/E1603M11Standard Practice forLeakage Measurement Using the Mass Spectrometer LeakDetector or Residual Gas Analyzer in the Hood Mode1This standard is issued under the fixed designation E1603/E1603M;the number immediately following the designation indicates the yearof original adopti
2、on or,in 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.Scope*1.1 This practice covers procedures for testing the sourcesof gas leaking at the ra
3、te of 1 108Pa m3/s(1 109standard-cm3/s at 0C)or greater.These test methods may beconducted on any object that can be evacuated and to the otherside of which helium or other tracer gas may be applied.Theobject must be structurally capable of being evacuated topressures of 0.1 Pa(approximately 103torr
4、).1.2 Three test methods are described;1.2.1 Test Method AFor the object under test capable ofbeing evacuated,but having no inherent pumping capability.1.2.2 Test Method BFor the object under test with integralpumping capability.1.2.3 Test Method CFor the object under test as in TestMethod B,in whic
5、h the vacuum pumps of the object under testreplace those normally used in the leak detector(LD).1.3 UnitsThe values stated in either SI or std-cc/sec unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents:therefore,eachsystem shall be used indepen
6、dently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 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-priate safety and hea
7、lth practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E1316 Terminology for Nondestructive Examinations2.2 ASNT Standards:3SNT-TC-1A Recommended Practice for Personnel Qualifi-cation and Certification in Nondestructive Testing
8、ANSI/ASNT-CP-189 Standard for Qualification and Certifi-cation of Nondestructive Testing Personnel2.3 Military Standard:MIL-STD-410 Nondestructive Testing Personnel Qualifica-tion and Certification42.4 AIA Standard:NAS-410 Certification and Qualification of NondestructiveTest Personnel53.Terminology
9、3.1 DefinitionsFor definitions of terms used in thispractice,see Terminology E1316.4.Summary of Practice4.1 These test methods covered in this practice require ahelium LD that can provide a system sensitivity of 10%or lessof the intended leakage rate to be measured.4.2 Test Method AThis test method
10、is used to helium leaktest objects that are capable of being evacuated to a reasonabletest pressure by the LD pumps during an acceptable length oftime(see Fig.1).This requires that the object be clean and dry.Auxiliary vacuum pumps having greater capacity than those inthe LD may be used in conjuncti
11、on with them.The leak testsensitivity will be reduced under these conditions.4.3 Test Method BThis test method is used to leak testequipment that can provide its own vacuum(that is,equipmentthat has a built-in pumping system)at least to a level of a fewhundred pascals(a few torr)or lower.Refer to Fi
12、g.2.4.4 Test Method CWhen a vacuum system is capable ofproducing internal pressures of less than 2 102Pa(2 104torr)in the presence of leaks,these leaks may be located and1This practice is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subc
13、ommittee E07.08 on LeakTesting Method.Current edition approved July 1,2011.Published July 2011.Originally approvedin 1994.Last previous edition approved in 2006 as E1603-99(2006).DOI:10.1520/E1603_E1603M-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Se
14、rvice at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.4Available from Stan
15、dardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.5Available from Aerospace Industries Association of America,Inc.(AIA),1000Wilson Blvd.,Suite 1700,Arlington,VA22209-3928,http:/www.aia-aerospace.org.*A Summary of Changes sectio
16、n appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 evaluated by the use of either a residual gas analyzer(RGA)orby using the spectrometer tube and controls from a conven-tional MSLD,provided that the leakage is within the sensitivityrange of the RGAor MSLD under the conditions existing in thevacuum system.Refer to Fig.3.5.Significance and Use5.1 Test Method AThis test method is the most frequentlyused
