1、Designation:E2181/E2181M11Standard Specification forCompacted Mineral-Insulated,Metal-Sheathed,Noble MetalThermocouples and Thermocouple Cable1This standard is issued under the fixed designation E2181/E2181M;the number immediately following the designation indicates the yearof original adoption or,i
2、n 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 specification establishes dimensional and materialrequirements for compacted,miner
3、al-insulated,metal-sheathed(MIMS),Type S(platinum-10%rhodium versus platinum),Type R(platinum-13%rhodium versus platinum),and Type B(platinum-30%rhodium versus platinum-6%rhodium)noblemetal thermocouples.This specification also establishes di-mensional and material requirements for compacted MIMScab
4、le with at least one noble metal thermoelement pair.1.2 This specification describes both the required processingand testing requirements and also the optional supplementarytesting and quality assurance requirements.1.3 Provisions are made for selecting the type of noblemetal thermocouple or thermoe
5、lements,either magnesia(MgO)or alumina(Al2O3)insulation,and a noble metal alloyor other alternate heat-resistant sheath material.Provisions arealso made for selecting a thermocouple measuring junctionstyle and for a transition or termination.1.4 The values stated in inch-pound units or SI(metric)uni
6、ts may be regarded separately as standard.The values statedin each system are not the exact equivalents,and each systemshall be used independently of the other.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 o
7、f this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 The following documents of the latest issue form a partof this specification to the extent specified herein.In the eventof a confli
8、ct between this specification and other specificationsreferenced herein,this specification shall take precedence.2.2 ASTM Standards:2A213/A213M Specification for Seamless Ferritic and Aus-tenitic Alloy-Steel Boiler,Superheater,and Heat-Exchanger TubesA249/A249M Specification for Welded Austenitic St
9、eelBoiler,Superheater,Heat-Exchanger,and CondenserTubesA269 Specification for Seamless and Welded AusteniticStainless Steel Tubing for General ServiceA632 Specification for Seamless and Welded AusteniticStainless Steel Tubing(Small-Diameter)for General Ser-viceB163 Specification for Seamless Nickel
10、and Nickel AlloyCondenser and Heat-Exchanger TubesB167 Specification for Nickel-Chromium-Iron Alloys(UNSN06600,N06601,N06603,N06690,N06693,N06025,N06045,andN06696),Nickel-Chromium-Cobalt-Molybdenum Alloy(UNS N06617),and Nickel-Iron-Chromium-Tungsten Alloy(UNS N06674)Seamless Pipeand TubeB516 Specifi
11、cation for Welded Nickel-Chromium-IronAlloy(UNS N06600,UNS N06603,UNS N06025,and UNSN06045)TubesE165 Practice for Liquid Penetrant Examination for GeneralIndustryE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE230 Specification and Temperature-Electromotive Force(EMF)Tables
12、 for Standardized ThermocouplesE344 Terminology Relating to Thermometry and Hydrom-etryE608/E608M Specification for Mineral-Insulated,Metal-Sheathed Base Metal ThermocouplesE839 Test Methods for Sheathed Thermocouples andSheathed Thermocouple CableE1652 Specification for Magnesium Oxide and Aluminum
13、Oxide Powder and Crushable Insulators Used in the1This specification is under the jurisdiction of ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.04on Thermocouples.Current edition approved Nov.1,2011.Published December 2011.Originallyapproved in 200
14、1.Last previous edition approved in 2006 as E2181/E2181M 06E01.DOI:10.1520/E2181_E2181M-11.2For 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
15、 page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Manufacture of Base Metal Thermocouples,Metal-Sheathed Platinum Resistance Thermometers,and NobleMetal ThermocouplesE1751/E1751M Guide for Temperature Electromotive
16、Force(emf)Tables for Non-Letter Designated ThermocoupleCombinations2.3 ANSI Standard:3B46.1 Surface Texture3.Terminology3.1 DefinitionsThe definitions given in Terminology E344shall apply to this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 adjacentthermoelementconfiguration,nthermoelement configuration within a multi-pair thermo-couple or cable where two or more positive thermoelements areimmediately adjacent to one another around the circular patternand two or more ne
