ASTM E585 E585M-2004 Standard Specification for Compacted Mineral-Insulated Metal-Sheathed Base Metal Thermocouple Cable.pdf

1、Designation: E 585/E 585M 04Standard Specification forCompacted Mineral-Insulated, Metal-Sheathed, Base MetalThermocouple Cable1This standard is issued under the fixed designation E 585/E 585M; the number immediately following the designation indicates the yearof original adoption or, in the case of

2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification establishes requirements for com-pacted, mineral-insulated, metal-sheathed,

3、 base metal thermo-couple cable,2with at least two thermoelements.31.2 This specification describes the required material, pro-cessing and testing requirements, and also the optional supple-mentary testing and quality assurance and verification choices.1.3 The material of construction includes stand

4、ard basemetal thermoelements, austenitic stainless steel or other corro-sion resistant sheath material, and either magnesia (MgO) oralumina (Al2O3) insulation.1.4 The values stated in inch-pound units or SI (metric)units may be regarded separately as standard. The values statedin each system are not

5、 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 of this standard to establish appro-priate safety and health practices and det

6、ermine the applica-bility of regulatory limitations 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 conflict between this specification and other specificationsreferenced herein, thi

7、s specification shall take precedence.2.2 ASTM Standards:4A 213/A 213M Specification for Seamless Ferritic andAustenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger TubesA 249/A 249M Specification for Welded Austenitic SteelBoiler, Superheater, Heat-Exchanger, and CondenserTubesA 269 Specifi

8、cation for Seamless and Welded AusteniticStainless Steel Tubing for General ServiceA 632 Specification for Seamless and Welded AusteniticStainless Steel Tubing (Small-Diameter) for General Ser-viceB 163 Specification for Seamless Nickel and Nickel AlloyCondenser and Heat-Exchanger TubesB 167 Specifi

9、cation for Nickel-Chromium-Iron Alloys(UNS N06600, N06601, N06603, N06690, N06693,N06025, and N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Seamless Pipe andTubeB 516 Specification for Welded Nickel-Chromium-Iron Al-loy (UNS N06600, UNS N06603, UNS N06025, and UNSN06045) TubesE 22

10、0 Test Method for Calibration of Thermocouples byComparison TechniquesE 230 Specification and Temperature-Electromotive Force(EMF) Tables for Standardized ThermocouplesE 235 Specification for Thermocouples, Sheathed, Type K,for Nuclear or for Other High-Reliability ApplicationsE 344 Terminology Rela

11、ting to Thermometry and Hydrom-etryE 608/E 608M Specification for Mineral-Insulated, Metal-Sheathed Base-Metal ThermocouplesE 780 Test Method for Measuring the Insulation Resistanceof Sheathed Thermocouple Material at Room TemperatureE 839 Test Methods for Sheathed Thermocouples andSheathed Thermoco

12、uple MaterialE 1652 Specification for Magnesium Oxide and AluminumOxide Powder and Crushable Insulators Used in theManufacture of Metal-Sheathed Platinum Resistance Ther-mometers, Base Metal Thermocouples, and Noble MetalThermocouples2.3 ANSI Standard:1This specification is under the jurisdiction of

13、 ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.04on Thermocouples.Current edition approved May 1, 2004. Published May 2004. Originallyapproved in 1996. Last previous edition approved in 2001 as E 585/E 585M-01a.2The terms “metal sheathed thermocoup

14、le cable” or “cable” will be used todescribe the subject description.3“Wire” 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

15、to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ANSI B46.1 Surface Texture53. Terminology3.1 DefinitionsThe definitions given in TerminologyE 344 shall apply to this specifica

16、tion.3.2 Definitions of Terms Specific to 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 negativethermoelemen

17、ts are also immediately adjacent to one 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 alternati

18、ng thermoelement configuration, nthermo-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 th

19、ermoelement pat-tern, there are never two or more positive thermoelements nortwo or more negative thermoelements immediately adjacent toone another.3.2.3 lot, na quantity of finished mineral-insulated, metal-sheathed thermocouple cable manufactured from tubing fromthe same heat, wire from the same s

20、pool and heat, andinsulation from the same batch then assembled and processedtogether under controlled production conditions to the requiredfinal outside diameter.3.2.4 raw material, ntubing, insulation, and wires used infabrication of the sheathed thermocouple cable.4. Significance and Use4.1 Therm

21、ocouple Cable may be Used as Follows:4.1.1 Sheathed thermocouple cable for use in manufacturingthermocouples (see Specification E 608/E 608M).4.1.2 Sheathed thermocouple cable for use as extensioncable in extremely harsh environments.5. Ordering Information and Basis for Purchase5.1 The purchasing d

22、ocuments shall specify the followingoptions:5.1.1 The total length of finished 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 toleranceon initial values of em

23、f versus temperature if other thanstandard (see 6.2). Consult individual manufacturers for thenumber of thermoelements limited by cable size.5.1.3 The kind of sheath material (see 7.3) and whether itshall be seamless or welded and drawn. Note that other sheathmaterial may be used with purchaser and

24、producer agreement.5.1.4 The nominal outside diameter of the sheath (see 6.3).5.1.5 The kind of ceramic insulation (see 7.2). Note thatother insulation composition and impurity levels may be usedwith purchaser and producer agreement.5.1.6 The intended operating temperature range of the cable(see 9.8

25、).5.1.7 The kind of end seal applied to the open ends, prior toshipment (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 specific

26、ation or the refer-enced documents.6. General Requirements6.1 Mineral-Insulated, MetalSheathed ThermocoupleCableCable shall be in accordance with this specification(see Fig. 3). This figure describes a cable with two thermoele-ments, but more than two thermoelements may be specified.6.2 Tolerances o

27、n Initial Values of Emf versusTemperatureThe standard tolerances of Specification E 230apply unless 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

28、in Fig. 3 shall bebased on nominal sheath outside diameters. The preferredcable sizes are listed in Table 1. For any nominal sheath size,the outside diameter tolerance, A, shall be 60.025 mm 0.001in. or 61 %, whichever is greater. The wall thickness, B, shallbe at least 10 % of the nominal sheath ou

29、tside diameter andshall be uniform within 20 % of the minimum required wallthickness. The thermoelement diameters, D, shall be at least15 % of the nominal sheath outside diameter if two thermo-elements are included, at least 12 % of the nominal sheathoutside diameter if four thermoelements are inclu

30、ded, or atleast 9 % of the nominal sheath outside diameter if sixthermoelements are included. All thermoelement diametersshall be uniform within 20 % of their minimum requireddiameters. The insulation thickness, C, either thermoelement tothermoelement or thermoelement to inside surface of thesheath,

31、 shall be at least 7 % of the nominal sheath outside5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.FIG. 1 Examples of Adjacent ConfigurationsFIG. 2 Examples of Alternating ConfigurationsE 585/E 585M 042diameter if two thermoelements are inc

32、luded, at least 5.5 % ofthe nominal sheath outside diameter if four thermoelements areincluded, or at least 4 % of the nominal sheath outside diameterif six thermoelements are included. The inside sheath diameteris equal to Diameter A minus two times dimension B. Dimen-sions shall be measured in acc

33、ordance with Test Methods E839. The minimum dimensional requirements for sheath wallthickness, thermoelement diameter, and insulation thicknessare summarized in Table 2. The purchaser need only specifythe outside diameter and number of thermoelements in theordering documents.6.4 MaterialsThe thermoc

34、ouple 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 each thermoelement and the sheath (at roomtemperature) shall be as specified in Table 3, for the volta

35、gesnoted. The values of insulation resistance, given in megohms,shall apply to the supplied lengths. See Test Methods E 780and E 839.6.6 Minimum Insulation DensityThe minimum density ofthe compacted electric insulation shall be 70 % of the maxi-mum theoretical density which is 3580 kg/m30.129 lb/in.

36、3for MgO, and 3970 kg/m30.144 lb/in.3 for Al2O3.6See alsoSupplementary Requirement S6.1.6.7 Sheath ConditionThe sheath shall be free of visiblesurface contaminants and oxidation. The sheath shall be in thefully annealed state for Type E, J, K, and N thermocouplematerial. For Type T material, the she

37、ath 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-couple cable shall exclude gases and liquids. There shall be noholes, cracks, or other void defects that

38、 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 purchaser may require material traceability,as desired (see Appendix X1).6.10 The tests as specified in

39、 the body of this specificationare the minimum to determine if the specification requirementshave been met. Additional optional supplementary require-ments are listed in the Supplementary Requirements sectionand may be included in the purchasing order requirements, asdesired by the purchaser.7. Mate

40、rial Requirements7.1 Thermoelements:7.1.1 The thermoelements shall be solid wire, round in crosssection.7.1.2 The thermoelements shall only be of thermoelectrictypes: E, J, K, N, or T. All wire used for fabrication shall meetthe supplemental cleanliness requirements of SpecificationA 632, except tha

41、t acetone or any other solvents that mightleave a harmful residue shall not be used for final cleaning.7.1.3 The 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 Spe

42、cification E 1652. 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, or heat-resistantnickel-chrome alloy.7.3.2

43、 The producers customary tubing specification shallbe applicable for the sheath material. See SupplementaryRequirement S8.7.3.3 A nickel-chrome-iron sheath, as in SpecificationsB 163, B 167, or B 516, is recommended for fresh water6Handbook of Chemistry and Physics, Chemical Rubber Publishing Co., N

44、o. 76(1995) edition.FIG. 3 Sheathed Thermocouple Material Construction(See Table 1)TABLE 1 Dimensions of Metal Sheathed Thermocouple Cable inSI (Metric) and Inch-Pound UnitsPreferred SizesNominal Outside Diameter, A, in millimetres inchesDiametermillimetres inches0.50 0.020. . . 0.0321.00 0.0401.50

45、0.0622.00 . . . . . 0.0933.00 0.1254.50 0.1886.00 0.2508.00 0.375TABLE 2 Summary of Thermocouple Cable DimensionalRequirements (Percent of Nominal Outside Diameter)Number of Thermoelements 2 4 6Minimum Sheath Thickness 10 % 10 % 10 %Minimum Thermoelement Diameter 15 % 12 % 9 %Minimum Insulation Thic

46、kness 7 % 5.5 % 4 %TABLE 3 Room-Temperature Insulation ResistanceRequirements in SI (Metric) and Inch-Pound UnitsNominal Sheath Outside DiameterApplied Voltage,min, V, dcInsulationResistance, min,MVLess 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

47、 in. 500 10 000E 585/E 585M 043service. There are high molybdenum stainless steels that arespecifically made for use in salt water, such as type 316 andproprietary alloys.7.3.4 Alternate heat-resistant tubing materials may be speci-fied for the sheath by the producer, provided the annealingrequireme

48、nts imposed by 6.7 are satisfied.7.3.5 Each piece of tubing used in the fabrication ofthermocouple material shall meet the supplemental cleanlinessrequirements of Specification A 632, except that acetone or anyother solvents that might leave a harmful residue shall not beused for final cleaning.8. P

49、rocessing Requirements8.1 The producer is responsible for raw materials and allprocessing to ensure that the overall requirements of thisspecification are met. The producer is also responsible for thequality of the finished product.9. Quality Verification and Test Requirements9.1 The following tests are required for all thermocouplecable furnished under this specification:9.1.1 Dimensional inspection,9.1.2 Insulation resistance at room temperature,9.1.3 Calibration, and9.1.4 Electrical continuity.9.2 DocumentationCertificate of conformance in accor-d