1、Designation:E1066/E1066M12Standard Practice forAmmonia Colorimetric Leak Testing1This standard is issued under the fixed designation E1066/E1066M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in p
2、arentheses 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 testing of large single-anddouble-walled tanks,pressure and vacuum vessels,laminated,lined-or double-walled parts,complex
3、 piping systems,flexiblecontainers(such as aircraft fuel tanks),glass-to-metal seals inhybrid packages,and systems that inherently contain or willcontain ammonia(such as large tonnage refrigeration systemsand fertilizer storage systems).1.2 This method can be used on piping,valves and contain-ers wi
4、th welded,fitted,or laminated sections that can be sealedat their ends or between their outer and inner walls and that aredesigned for internal pressures of 34.5 kPa 5 psig or greater.1.3 Basic procedures are described based on the type ofinspection used.These procedures should be limited to finding
5、leakage indications of 4.5 1012mol/s 1 107Std cm3/s2or larger.1.4 UnitsThe values stated in Std cm3/s or mol/s are to beregarded separately as standard.The values stated in eachsystem may not be exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the
6、two systems may result in non-conformance with thestandard.1.5 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 health practices and determine the applica-bilit
7、y of regulatory limitations prior to use.(For more specificsafety precautionary information see 7.4,8.2,9.4.1,and10.3.1).2.Referenced Documents2.1 ASTM Standards:3E1002 Practice for Leaks Using UltrasonicsE1316 Terminology for Nondestructive Examinations2.2Other Documents:SNT-TC-1A Recommended Pract
8、ice for Personnel Qualifi-cation and Certification in Nondestructive Testing4ANSI/ASNT CP-189 ASNT Standard for Qualification andCertification of Nondestructive Testing Personnel43.Terminology3.1 DefinitionsFor definitions of terms used in thisstandard,see Terminology E1316,Section E.4.Summary of Pr
9、actice4.1 This test method consists of testing a container alreadyfilled with ammonia or of introducing an anhydrous ammoniaor an ammonia-nitrogen mixture into a container or system sothat the final ammonia percentage achieved is between 1 and100%by volume at a gage pressure between 34.5 and 689.5kP
10、a 5 and 100 psig.The ammonia flows through leaksexisting in welds and connections and reacts with a developerthat is applied outside of the container producing a visibleindication.4.2 Two basic developer procedures are described:4.2.1 Smoke-producing developers.4.2.2 Color-change developers.4.3 Meth
11、ods of introducing ammonia into unfilled systemsare described,together with methods of estimating the concen-tration and pressure needed to achieve specific detectable leakrates.1This test method is under the jurisdiction of ASTM Committee E07 onNondestructive Testing and is the direct responsibilit
12、y of Subcommittee E07.08 onLeak Testing Method.Current edition approved June 15,2012.Published July 2012.Originallyapproved in 1985.Last previous edition approved in 2006 as E1066-95(2006).DOI:10.1520/E1066-12.2The gas temperature is referenced to 0C.To convert to another gas referencetemperature,Tr
13、ef,multiply the leak rate by(Tref+273)/273.3For 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.4Available fromAmerican
14、 Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.4 Procedures for testing large tanks and systems aredescribed.4.5 Ultras
15、onic pretesting for gross leaks is described.5.Personnel Qualification5.1 It is recommended that personnel performing leak test-ing attend a dedicated training course on the subject and passa written examination.The training course should be appropri-ate for NDT level II qualification according to R
16、ecommendedPractice No.SNT-TC-1A of the American Society for Nonde-structive Testing or ANSI/ASNT Standard CP-189.6.Significance and Use6.1 This method is useful for locating and measuring thesize of gas leaks either as a quality-control test or as afield-inspection procedure.It can be used to test critical parts orcontainers that will hold toxic or explosive gases or liquids oras a quick test for other containers.7.Interferences7.1 The interior and exterior welds and joints where leaksare often