ASTM E585 E585M-2018 5625 Standard Specification for Compacted Mineral-Insulated Metal-Sheathed Base Metal Thermocouple Cable.pdf

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1、Designation: E585/E585M 18Standard Specification forCompacted Mineral-Insulated, Metal-Sheathed, Base MetalThermocouple Cable1This standard is issued under the fixed designation E585/E585M; the number immediately following the designation indicates the yearof original adoption or, in the case of rev

2、ision, 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 requirements forcompacted, mineral-insulated, metal-sheathed (MIMS),

3、 basemetal thermocouple cable,2with at least two thermoelements.31.2 This specification describes the required material, pro-cessing and testing requirements, optional supplementarytesting, quality assurance, and verification choices.1.3 The material of construction includes standard basemetal therm

4、oelements, austenitic stainless steel or other corro-sion resistant sheath material, and either magnesia (MgO) oralumina (Al2O3) insulation.1.4 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 equivale

5、nts; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.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 th

6、is standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Dec

7、ision 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 The following documents of the latest issue form a partof this specification to the extent speci

8、fied herein. In the eventof a conflict between this specification and other specificationsreferenced herein, this specification shall take precedence.2.2 ASTM Standards:4A213/A213M Specification for Seamless Ferritic and Aus-tenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger TubesA249/A249M

9、 Specification for Welded Austenitic SteelBoiler, 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

10、-viceB163 Specification for Seamless Nickel and Nickel AlloyCondenser and Heat-Exchanger TubesB167 Specification for Nickel-Chromium-Iron Alloys (UNSN06600, N06601, N06603, N06690, N06693, N06025,N06045, and N06696), Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617), and Nickel-Iron-Chromium-Tung

11、sten Alloy (UNS N06674) Seamless Pipeand TubeB423 Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825, N08221, andN06845) Seamless Pipe and TubeB516 Specification forWelded Nickel-Chromium-IronAlloy(UNS N06600, UNS N06601, UNS N06603, UNSN06025, UNS N06045, UNS N06690, and UNS

12、 N06693)TubesE112 Test Methods for Determining Average Grain SizeE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE230 Specification and Temperature-Electromotive Force(EMF) Tables for Standardized ThermocouplesE235 Specification for Thermocouples, Sheathed, Type Kand Type N,

13、 for Nuclear or for Other High-ReliabilityApplications1This specification is under the jurisdiction of ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.12on Thermocouples - Specifications.Current edition approved June 1, 2018. Published June 2018. Ori

14、ginallyapproved in 1996. Last previous edition approved in 2012 as E585/E585M 12.DOI: 10.1520/E0585_E0585M-18.2The terms “MIMS cable”, or “thermocouple cable”, or “MIMS thermocouplecable”, or “cable” will be used herein to describe mineral-insulated, metal-sheathed,base metal thermocouple cable.3“Wi

15、re” is also used to describe “thermoelements.”4For 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.Copyright ASTM

16、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 Standa

17、rds, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1E344 Terminology Relating to Thermometry and Hydrom-etryE608 Specification for Mineral-Insulated, Metal-SheathedBase Metal ThermocouplesE780 Test Method for Measuring the Insulation Re

18、sistanceof Mineral-Insulated, Metal-Sheathed Thermocouples andMineral-Insulated, Metal-Sheathed Cable at Room Tem-peratureE839 Test Methods for Sheathed Thermocouples andSheathed Thermocouple CableE1652 Specification for Magnesium Oxide and AluminumOxide Powder and Crushable Insulators Used in theMa

19、nufacture of Base Metal Thermocouples, Metal-Sheathed Platinum Resistance Thermometers, and NobleMetal Thermocouples2.3 ANSI Standard:ANSI B46.1 Surface Texture53. Terminology3.1 DefinitionsThe definitions given in TerminologyE344 shall apply to this specification.3.2 Definitions of Terms Specific t

20、o This Standard:3.2.1 adjacent thermoelement configuration, nthermo-element configuration within a multi-pair cable where two ormore positive thermoelements are immediately adjacent to oneanother around the circular pattern and two or more negativethermoelements are also immediately adjacent to one

21、anotheraround the circular pattern as shown in Fig. 1 (compare withalternating thermoelement configuration in Fig. 2).3.2.1.1 DiscussionBy default, a multi-pair cable with athermoelement in the center must be considered an adjacentconfiguration.3.2.2 alternating thermoelement configuration, nthermo-

22、element configuration within a multi-pair cable where positivethermoelements and negative thermoelements alternate aroundthe circular pattern as shown in Fig. 2 (compare with adjacentthermoelement configuration in Fig. 1).3.2.2.1 DiscussionIn an alternating thermoelementpattern, there are never two

23、or more positive thermoelementsnor two or more negative thermoelements immediately adja-cent to one another.3.2.3 lot, na quantity of finished MIMS thermocouplecable manufactured from tubing from the same heat, wire fromthe same spool and heat, and insulation from the same batchthen assembled and pr

24、ocessed together under controlled pro-duction conditions to the required final outside diameter.3.2.4 raw material, ntubing, insulation, and wires used infabrication of the MIMS thermocouple cable.4. Significance and Use4.1 Thermocouple Cable may be used as follows:4.1.1 Sheathed thermocouple cable

25、for use in manufacturingthermocouples (see Specification E608).4.1.2 Sheathed thermocouple cable for use as extensioncable in extremely harsh environments.5. Ordering Information and Basis for Purchase5.1 The purchasing documents shall specify the followingoptions:5.1.1 The total length of finished

26、thermocouple cable andthe length of each piece of finished thermocouple cable.5.1.2 The type and quantity of thermoelements, the thermo-element configuration (see 3.2.1 and 3.2.2), and the tolerancerange for initial values of emf versus temperature if other thanstandard (see 6.2). Consult individual

27、 manufacturers for thenumber of thermoelements limited by cable size.5.1.3 The sheath material (see 7.3) and whether it shall beseamless or welded and drawn. Note that other sheath materialmay be used with purchaser and producer agreement.5.1.4 The nominal outside diameter of the sheath (see 6.3).5.

28、1.5 The composition of mineral oxide insulation (see 7.2).Note that other insulation composition(s) and impurity levelsmay be used with purchaser and producer agreement.5.1.6 The intended operating temperature range of the cable(see 9.8).5.1.7 The method used to seal the open ends, prior toshipment

29、(see 11.1).5.1.8 Supplementary testing or material requirements (seeSupplementary Requirements).5.1.9 The quality assurance or verification program require-ments or both (see Appendix X1).5.1.10 Any deviations from this specification or the refer-enced documents.6. General Requirements6.1 MIMS Therm

30、ocouple CableCable shall be in accor-dance with this specification (see Fig. 3). This figure describesa cable with two thermoelements, but more than two thermo-elements may be specified.6.2 Tolerances on Initial Values of Emf versusTemperatureThe standard tolerances of Specification E230apply unless

31、 otherwise stated in the ordering information.6.3 DimensionsThe dimensional and tolerance require-ments for sheath diameter and wall thickness, thermoelementdiameter, and insulation thickness depicted in Fig. 3 shall be5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th

32、Floor, New York, NY 10036, http:/www.ansi.org.FIG. 1 Examples of Adjacent ConfigurationsFIG. 2 Examples of Alternating ConfigurationsE585/E585M 182based on nominal sheath outside diameters and number ofthermoelements. The preferred cable sizes and sheath diametertolerances are listed in Table 1. The

33、 minimum dimensionalrequirements for sheath wall thickness, thermoelementdiameter, and insulation thickness are summarized in Table 2.The purchaser need only specify the outside diameter andnumber of thermoelements in the ordering documents.6.3.1 Sheath DiameterFor any nominal sheath size, theoutsid

34、e diameter tolerance, A, shall be 60.025 mm 0.001 in.or 61 %, whichever is greater.6.3.2 Sheath Wall ThicknessThe wall thickness, B, shallbe at least 10 % of the nominal sheath outside diameter andshall be uniform within 20 % of the minimum required wallthickness.6.3.3 Thermoelement DiameterThe ther

35、moelementdiameter, D, shall be at least 15 % of the nominal sheathoutside diameter if two thermoelements are included, at least12 % of the nominal sheath outside diameter if four thermo-elements are included, or at least 9 % of the nominal sheathoutside diameter if six thermoelements are included. A

36、llthermoelement diameters shall be uniform within 20 % of theirminimum required diameters.6.3.4 Insulation ThicknessThe insulation thickness, C,either thermoelement to thermoelement or thermoelement toinside surface of the sheath, shall be at least 7 % of the nominalsheath outside diameter if two th

37、ermoelements are included, atleast 5.5 % of the nominal sheath outside diameter if fourthermoelements are included, or at least 4 % of the nominalsheath outside diameter if six thermoelements are included.6.3.5 Sheath Inside DiameterThe inside sheath diameteris equal to Diameter A minus two times di

38、mension B. Dimen-sions shall be measured in accordance with Test MethodsE839.6.4 MaterialsThe thermocouple cable shall be fabricatedfrom component parts specified in Section 7.6.5 Insulation Resistance at Room TemperatureThe mini-mum electric insulation resistance between thermoelementsand between e

39、ach thermoelement and the sheath (at roomtemperature) shall be as specified in Table 3, for the voltagesnoted. The values of insulation resistance, given in megohms,shall apply to the supplied lengths. See Test Methods E780 andE839.6.6 Minimum Insulation DensityThe minimum density ofthe compacted el

40、ectrical insulation shall be 70 % of themaximum theoretical density which is 3580 kg/m30.129lb/in.3 for MgO, and 3970 kg/m30.144 lb/in.3 for Al2O3.6See also Supplementary Requirement S6.1.6.7 Sheath ConditionThe sheath shall be free of visiblesurface contaminants and oxidation. The sheath shall be i

41、n thefully annealed state for Type E, J, K, and N thermocouplematerial. For Type T material, the sheath shall be annealed tothe extent that the thermoelements will permit. Tests forproving conformance are in Supplementary Requirement S2 orS9.6.8 Sheath IntegrityThe sheath of the finished thermo-coup

42、le cable shall exclude gases and liquids. There shall be noholes, cracks, or other void defects that penetrate through thesheath wall. Tests for proving conformance to this requirementare in Supplementary Requirement S3.6.9 Quality verification requirements are specified on anoptional basis. The pur

43、chaser may require material traceability,as desired (see Appendix X1).6.10 The tests in this specification are the minimum todetermine if the specification requirements have been met.Additional optional supplementary requirements are listed inthe Supplementary Requirements section and may be include

44、din the purchase order requirements, if desired by the purchaser.6Handbook of Chemistry and Physics, Chemical Rubber Publishing Co., No. 76(1995) edition.FIG. 3 MIMS Thermocouple Material Construction(See Table 1)TABLE 1 Dimensions and Tolerances of MIMS Cable in SI(Metric) and Inch-Pound UnitsPrefe

45、rred SizesNominal Outside Diameter, A, in millimetres inchesDiameters listed below are commonly available sizes.Diametermillimetres inches0.50 0.020. . . 0.0321.00 0.0401.50 0.0622.00 . . . . . 0.0933.00 0.1254.50 0.1886.00 0.2508.00 0.375TABLE 2 Summary of Thermocouple Cable DimensionalRequirements

46、 (Percent of Nominal Outside Diameter)Number of Thermoelements 2 4 6Minimum Sheath Thickness 10 % 10 % 10 %Minimum Thermoelement Diameter 15 % 12 % 9 %Minimum Insulation Thickness 7 % 5.5 % 4 %TABLE 3 Room-Temperature Insulation Resistance Requirementsin SI (Metric) and Inch-Pound UnitsNominal Sheat

47、h Outside DiameterApplied Voltage,min, V, dcInsulationResistance, min,MLess than 0.80 mm 0.030 in. 50 10000.80 to 1.45 mm 0.030 to 0.057 in. 50 5000Larger than 1.45 mm 0.057 in. 500 10 000E585/E585M 1837. Material Requirements7.1 Thermoelements:7.1.1 The thermoelements shall be solid wire, round in

48、crosssection.7.1.2 The thermoelements shall only be of Type E, J, K, N,or T. All wire used for fabrication shall meet the supplementalcleanliness requirements of Specification A632, except thatacetone or any other solvent that might leave a harmful residueshall not be used for final cleaning.7.1.3 T

49、he emf-versus-temperature relationship shall meetthe initial calibration tolerance of 6.2.7.2 Insulation:7.2.1 The insulation shall only be magnesia (MgO) oralumina (Al2O3) conforming to Specification E1652. Unlessotherwise agreed upon between the purchaser and the producer,only Type 1 magnesia or Type 1 alumina shall be used.7.3 Sheath Material:7.3.1 The sheath material may be seamless or welded anddrawn tubing of austenitic stainless steel (typically type TP304,TP304L, TP310, TP310S, TP316, TP316L, TP321, or TP347)or heat-resistant nickel-ch