1、Designation: C 585 90 (Reapproved 2004)Standard Practice forInner and Outer Diameters of Rigid Thermal Insulation forNominal Sizes of Pipe and Tubing (NPS System)1This standard is issued under the fixed designation C 585; the number immediately following the designation indicates the year oforiginal
2、 adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice is intended as a dimensional standard forpreformed r
3、igid thermal insulation for pipes and tubing.1.2 This practice covers insulation supplied in cylindricalsections, usually split into half-sections, and lists recom-mended inner and outer diameters of insulation having nominalwall thicknesses from 1 to 5 in. (25 to 127 mm) to fit overstandard sizes o
4、f pipe and tubing.1.3 The values stated in inch-pound units are to be regardedas the standard. The values stated in SI units are provided forinformation only.1.4 This standard does not purport to address the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this
5、 standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 168 Terminology Relating to Thermal Insulation3. Terminology3.1 DefinitionsDefinitions pertaining to insulation are de-fine
6、d in Terminology C 168.4. Significance and Use4.1 The purpose of this practice is to ensure satisfactory fiton standard sizes, to accommodate radial expansion of pipesand tubes which are heated after being insulated, and tominimize the number of insulation sizes and thicknesses to bemanufactured and
7、 stocked.4.2 While insulation may be manufactured to these recom-mended dimensions, care should be exercised in attempting tonest layers of different materials, or layers supplied by differentmanufacturers. Individual manufacturing processes may oper-ate at slightly different tolerances. While the p
8、roduct will fit thepipe, it may not readily nest as the outer layer between thedifferent materials or with different manufacturers. Care shouldbe exercised to determine these differences before specifyingor ordering nesting sizes.4.3 Dimensions in accordance with this practice permitapplication of o
9、ne thickness of pipe insulation over another(Nesting or Simplified Dimensional System), to obtain totalthicknesses greater than those manufactured as single layer, orfor multilayer application when desired.5. ProcedureNOTE 1Suggested tolerances are shown for information purposesonly.5.1 Measurement:
10、5.1.1 Measurement of inner and outer diameters shall bemade to the nearest132 in. (0.8 mm) using a steel tape or rule.5.1.1.1 Half SectionsThe diameter reported for each half-section shall be the average of six measurements taken at threelocations including two near the ends and one near the center(
11、see Fig. 1a and Fig. 2a). Three of the six readings shall betaken in the longitudinal plane of the flat, cut surface: the otherthree shall each be twice a half-diameter in the longitudinalplane at right angles to that of the first three (see Fig. 1b andFig. 2b).5.1.1.2 Hinged SectionsThe diameter re
12、ported for eachhinged section shall be the average of four measurements takenat both ends of the section (two per end) (see Fig. 3). The twomeasurements at each end shall be at right angles.5.2 Recommended Inner Diameters:5.2.1 Inner diameters and suggested tolerances for nominalsizes of insulation
13、for pipe are shown in Table 1. Iron pipe insizes for 412 , 5, 7-in. (113, 125, 175-mm), and largerodd-numbered diameters is not standard, but insulation forthese is included for multi-layer purposes.5.2.2 Inner diameters and suggested tolerances for nominalsizes of tubing through 6 in. (150-mm) are
14、shown in Table 2.5.3 Recommended Outer Diameters:1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.20 on HomogeneousInorganic Thermal Insulations.Current edition approved April 1, 2004. Published May 2004. Origina
15、llyapproved in 1966 to replace C 312 and C 521. Last previous edition approved in1998 as C 585 90 (1998).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 standar
16、ds Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.3.1 Nominal outer diameters for nominal sizes of pipe areshown in Table 3 and Table 4 and tubing in Table 5 and Table6. It should be noted
17、that these values for both pipe and tubingare identical with iron pipe outer diameters as shown inColumns 2 and 3 of Table 3 and Table 4. Table 3, Table 4, Table5, and Table 6 are for nesting purposes only. When product isto be nested, it shall be so stated on order.5.3.2 Suggested maximum outer dia
18、meters for nominalsizes of pipe are shown in Table 7 and Table 8 and tubing inTable 9 and Table 10. Table 7, Table 8, Table 9, and Table 10are for jacketing purposes only.5.4 Approximate Insulation Wall Thickness:5.4.1 For information purposes, the wall thicknesses of pipeinsulation obtained by subt
19、racting inner diameters in Table 1from corresponding outer diameters in Table 3 and Table 4, anddividing the results by two, are shown in Table 11. Correspond-ing values for tubing are shown in Table 12.6. Keywords6.1 pipe thermal insulation diameter; pipe thermal insula-tion dimension; pipe thermal
20、 insulation thickness; thermalinsulation; thermal insulating materials-pipe; thermal insulat-ing materials-rigid; tubing thermal insulation thicknessFig. 1a Three Meaurement LocationsFig. 1b Diameter and Half-Diameter Measurement LocationsFIG. 1 Inner Diameter MeasurementFig. 2a Three Measurement Lo
21、cationsFig. 2b Diameter and Half-Diameter Measurement LocationsFIG. 2 Outer Diameter MeasurementC 585 90 (2004)2FIG. 3 Hinged Section Measurement LocationsTABLE 1 Inner Diameter of Insulation for Nominal Pipe Size (NPS)Pipe InsulationNominal Size Outer Diameter Inner DiameterToleranceMinus Plusin. i
22、n. mm in. mm in. mm in. mm12 0.840 21.3 0.86 22 0 0116 1.634 1.050 26.7 1.07 27 0 0116 1.61 1.315 33.4 1.33 34 0 0116 1.6114 1.660 42.2 1.68 43 0 0116 1.6112 1.900 48.3 1.92 49 0 0116 1.62 2.375 60.3 2.41 61 0 0332 2.4212 2.875 73.0 2.91 74 0 0332 2.43 3.500 88.9 3.53 90 0 0332 2.4312 4.000 101.6 4.
23、03 102132 0.8332 2.44 4.500 114.3 4.53 115132 0.8332 2.4412 5.000 127.0 5.03 128132 0.8332 2.45 5.563 141.4 5.64 143132 0.8332 2.46 6.625 168.3 6.70 170132 0.8332 2.47 7.625 193.7 7.70 196132 0.8332 2.48 8.625 219.1 8.70 221132 0.8332 2.49 9.625 244.5 9.70 246132 0.8332 2.410 10.750 273.0 10.83 2751
24、32 0.8332 2.411 11.750 298.4 11.83 300132 0.8332 2.412 12.750 323.8 12.84 326116 1.6332 2.414A14.000 355.6 14.09 358116 1.6532 4.0ALarger sizes through 26 in., in 1-in. (25.4-mm) increments.C 585 90 (2004)3TABLE 2 Inner Diameter of Insulation TubesTube InsulationNominal Size Outer Diameter Inner Dia
25、meterToleranceMinus Plusin. in. mm in. mm in. mm in. mm38 0.500 12.7 0.52 13 0 0116 1.612 0.625 15.9 0.64 16 0 0116 1.634 0.875 22.2 0.89 23 0 0116 1.61 1.125 28.6 1.14 29 0 0116 1.6114 1.375 34.9 1.39 35 0 0116 1.6112 1.625 41.3 1.64 42 0 0116 1.62 2.125 54.0 2.16 55 0 0116 1.6212 2.625 66.7 2.66 6
26、8 0 0116 1.63 3.125 79.4 3.16 80 0 0116 1.6312 3.625 92.1 3.66 93 0 0116 1.64 4.125 104.8 4.16 106132 0.8332 2.45 5.125 130.2 5.16 131132 0.8332 2.46 6.125 155.6 6.20 157132 0.8332 2.4TABLE 3 Outer Diameters of Insulation for Nominal Pipe Sizes (NPS), in.Pipe Insulation, Nominal ThicknessNominalSize
27、in. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, in.A12 2.88 4.00 5.00 6.62 7.62 8.62 9.62 10.75 11.7534 2.88 4.00 5.00 6.62 7.62 8.62 9.62 10.75 11.751 3.50 4.50 5.56 6.62 7.62 8.62 9.62 10.75 11.75114 3.50 5.00 5.56 6.62 7.62 8.62 9.62 10.75 11.75112 4.00 5.00 6.62 7.6
28、2 8.62 9.62 10.75 11.75 12.752 4.50 5.56 6.62 7.62 8.62 9.62 10.75 11.75 12.75212 5.00 6.62 7.62 8.62 9.62 10.75 11.75 12.75 14.003 5.56 6.62 7.62 8.62 9.62 10.75 11.75 12.75 14.00312 6.62 7.62 8.62 9.62 10.75 11.75 12.75 12.75 14.004 6.62 7.62 8.62 9.62 10.75 11.75 12.75 14.00 15.00412 7.62 8.62 9.
29、62 10.75 11.75 12.75 14.00 14.00 15.005 7.62 8.62 9.62 10.75 11.75 12.75 14.00 15.00 16.006 8.62 9.62 10.75 11.75 12.75 14.00 15.00 16.00 17.007 . 10.75 11.75 12.75 14.00 15.00 16.00 17.00 18.008 . 11.75 12.75 14.00 15.00 16.00 17.00 18.00 19.009 . 12.75 14.00 15.00 16.00 17.00 18.00 19.00 20.0010 .
30、 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.0011 . 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.0012 . 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.0014B. 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00AThese are identical with pipe outer diameters (see Table 1, Columns 2 and 3).BLarger sizes thro
31、ugh 36 in., in 1-in. (25.4-mm) increments.C 585 90 (2004)4TABLE 4 Outer Diameters of Insulation for Nominal Pipe Sizes (NPS), mmPipe Insulation, Nominal ThicknessNominalSizein. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, mmA12 73 102 127 168 194 219 244 273 29834 73 102
32、 127 168 194 219 244 273 2981 89 114 141 168 194 219 244 273 298114 89 127 141 168 194 219 244 273 298112 102 127 168 194 219 244 273 298 3242 114 141 168 194 219 244 273 298 324212 127 168 194 219 244 273 298 324 3563 141 168 194 219 244 273 298 324 356312 168 194 219 244 273 298 324 356 3814 168 1
33、94 219 244 273 298 324 356 381412 194 219 244 273 298 324 356 381 4065 194 219 244 273 298 324 356 381 4066 219 244 273 298 324 356 381 406 4327 . 273 298 324 356 381 406 432 4578 . 298 324 356 381 406 432 457 4839 . 324 356 381 406 432 457 483 50810 . 356 381 406 432 457 483 508 53311 . 381 406 432
34、 457 483 508 533 55912 . 406 432 457 483 508 533 559 58414B. 432 457 483 508 533 559 584 610AThese are identical with pipe outer diameters (see Table 1, Columns 2 and 3).BLarger sizes through 36 in., in 1-in. (25.4-mm) increments.TABLE 5 Outer Diameters of Insulation for Tubes, in.Tube Insulation, N
35、ominal ThicknessNominalSizein. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, in.A38 2.38 3.50 4.50 5.56 6.62 . . . .12 2.88 3.50 4.50 5.56 6.62 . . . .34 2.88 4.00 5.00 6.62 7.62 8.62 9.62 10.75 11.751 2.88 4.00 5.00 6.62 7.62 8.62 9.62 10.75 11.75114 3.50 4.50 5.56 6.62
36、7.62 8.62 9.62 10.75 11.75112 3.50 4.50 5.56 6.62 7.62 8.62 9.62 10.75 11.752 4.00 5.00 6.62 7.62 8.62 9.62 10.75 11.75 12.75212 4.50 5.56 6.62 7.62 8.62 9.62 10.75 11.75 12.753 5.00 6.62 7.62 8.62 9.62 10.75 11.75 12.75 14.00312 5.56 6.62 7.62 8.62 9.62 10.75 11.75 12.75 14.004 6.62 7.62 8.62 9.62
37、10.75 11.75 12.75 14.00 15.005 7.62 8.62 9.62 10.75 11.75 12.75 14.00 15.00 16.006 8.62 9.62 10.75 11.75 12.75 14.00 15.00 16.00 17.00AThese are identical with pipe outer diameters (see Table 1, Columns 2 and 3).C 585 90 (2004)5TABLE 6 Outer Diameters of Insulation for Tubes, mmTube Insulation, Nomi
38、nal ThicknessNominalSizein. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, mmA38 60 89 114 141 168 . . . .12 73 89 114 141 168 . . . .34 73 102 127 168 194 219 244 273 2981 73 102 127 168 194 219 244 273 298114 89 114 141 168 194 219 244 273 298112 89 114 141 168 194 219 2
39、44 273 2982 102 127 168 194 219 244 273 298 324212 114 141 168 194 219 244 273 298 3243 127 168 194 219 244 273 298 324 356312 141 168 194 219 244 273 298 324 3564 168 194 219 244 273 298 324 356 3815 194 219 244 273 298 324 356 381 4066 219 244 273 298 324 356 381 406 432AThese are identical with p
40、ipe outer diameters (see Table 1, Columns 2 and 3).TABLE 7 Outer Diameters of Insulation for Nominal Pipe Sizes (NPS), maximum, in.Pipe Insulation, Nominal ThicknessNominalSizein. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, in.A12 3.25 4.38 5.38 7 8 9 10 11.13 12.1334 3
41、.25 4.38 5.38 7 8 9 10 11.13 12.131 3.88 4.88 6789101.13 12.13114 3.88 5.38 11.13 12.13112 4.38 5.38 7 8 9 10 11.13 12.13 13.132 4.88 6789101.13 12.13 13.13212 5.38 7 8 9 10 11.13 12.13 13.13 14.383 6 7 8 9 10 11.13 12.13 13.13 14.38312 7 8 9 10 11.13 12.13 13.13 13.13 14.384 7 8 9 10 11.13 12.13 13
42、.13 14.38 15.38412 8 9 10 11.13 12.13 13.13 14.38 14.38 15.385 9 9 10 11.13 12.13 13.13 14.38 15.38 16.386 9 10 11.13 12.13 13.13 14.38 15.38 16.38 17.387 . 11.13 12.13 13.13 14.38 15.38 16.38 17.38 18.388 . 12.13 13.13 14.38 15.38 16.38 17.38 18.38 19.389 . 13.13 14.38 15.38 16.38 17.38 18.38 19.38
43、 20.3810 . 14.38 15.38 16.38 17.38 18.38 19.38 20.38 21.3811 . 15.38 16.38 17.38 18.38 19.38 20.38 21.38 22.3812 . 16.38 17.38 18.38 19.38 20.38 21.38 22.38 23.3814B. 17.50 18.50 19.50 20.50 21.50 22.50 23.50 24.50AThese are identical with pipe outer diameters (see Table 1, Columns 2 and 3).BLarger
44、sizes through 36 in., in 1-in. (25.4-mm) increments.C 585 90 (2004)6TABLE 8 Outer Diameters of Insulation for Nominal Pipe Sizes (NPS), maximum, mmPipe Insulation, Nominal ThicknessNominalSizein. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, mmA12 83 112 137 178 203 229 2
45、54 283 30834 83 112 137 178 203 229 254 283 3081 99 124 153 178 203 229 254 283 308114 99 137 153 178 203 229 254 283 308112 112 137 178 203 229 254 283 308 3342 124 153 178 203 229 254 283 308 334212 137 178 203 229 254 283 308 334 3653 153 178 203 229 254 283 308 334 365312 178 203 229 254 283 308
46、 334 365 3914 178 203 229 254 283 308 334 365 391412 203 229 254 283 308 334 365 391 4165 229 229 254 283 308 334 365 391 4166 229 254 283 308 334 365 391 416 4417 . 283 308 334 365 391 416 441 4678 . 308 334 365 391 416 441 467 4929 . 334 365 391 416 441 467 492 51810 . 365 391 416 441 467 492 518
47、54311 . 391 416 441 467 492 518 543 56812 . 416 441 467 492 518 543 568 59414B. 445 470 495 521 546 572 597 622AThese are identical with pipe outer diameters (see Table 1, Columns 2 and 3).BLarger sizes through 36 in. in 1-in. (25.4-mm) increments.TABLE 9 Outer Diameters of Insulation for Tubes, Max
48、imum, in.Tube Insulation, Nominal ThicknessNominalSizein. 1 112 2212 3312 4412 5mm 25 38 51 64 76 89 102 114 127in. Outer Diameter, in.A38 2.75 3.88 4.88 5.88 7 . . . .12 3.25 3.88 4.88 5.88 7 . . . .34 3.25 4.38 5.38 7 8 9 10 11.13 12.131 3.25 4.38 5.38 7 8 9 10 11.13 12.13114 3.88 4.88 5.88 7 8 9
49、10 11.13 12.13112 3.88 4.88 5.88 7 8 9 10 11.13 12.132 4.38 5.38 7 8 9 10 11.13 12.13 13.13212 4.88 5.88 7 8 9 10 11.13 12.13 13.133 5.38 7 8 9 10 11.13 12.13 13.13 14.38312 5.88 7 8 9 10 11.13 12.13 13.13 14.384 7 8 9 10 11.13 12.13 13.13 14.38 15.385 8 9 10 11.13 12.13 13.13 14.38 15.38 16.386 9 10 11.13 12.13 13.13 14.38 15.38 16.38 17.38AThese are identical with pipe outer diameters (see Table 1, Columns 2 and 3).C 585 90 (2004
