1、Designation: C 921 03aStandard Practice forDetermining the Properties of Jacketing Materials forThermal Insulation1This standard is issued under the fixed designation C 921; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This practice covers jackets appl
3、ied over thermal insu-lation on piping and equipment, including materials appliedsolely for physical protection, and materials applied as vaporretarders.1.2 This practice provides material and physical require-ments, or both, for jackets. Guidance in selecting the properjacket for a given applicatio
4、n can be found in Guide C 1423.1.3 This practice does not cover field applied mastics orbarrier coatings and their attendant reinforcements, nor does itcover jackets for buried insulation systems.1.4 The values stated in inch-pound units are to be regardedas standard. SI units are given in parenthes
5、is.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-bility of regulatory limitations prior to use.2. Reference
6、d Documents2.1 ASTM Standards:A 167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and Strip2A 240 Specification for Heat-Resistant Chromium andchromim-Nickel Stainless Steel Plate, Sheet and Steel2A 366/A366M Specification for Steel, Sheet, Carbon, Cold-Rolled, Co
7、mmercial Quality3A 653/A653M Specification for Steel Sheet, Zinc Coated(Galvanized), or Zinc-IronAlloy, Coated (Galvanealed) bythe Hot-dip Process4A 792/A792M Specification for Steel Sheet, 55%Aluminum-Zinc Alloy, Coated by the Hot-Dip Method4B 209 Specification for Aluminum and Aluminum-AlloySheet
8、and Plate5C 168 Terminology Relating to Thermal Insulating Materi-als6C 390 Practice for Sampling and Acceptance of PreformedThermal Insulation6C 921 Practice for Sampling and Acceptance of PreformedThermal Insulation6C 1258 Practice for Sampling andAcceptance of PreformedThermal Insulation6C 1263 T
9、est Method for Thermal Integrity of FlexibleWater Vapor Retarders6C 1338 Test Method for Determining Fungi Resistance ofInsulation Materials and Facings6C 1423 Guide for Selecting Jacketing Materials for Ther-mal Insulation6C 835 Test Method for Total Hemispherical Emittance ofSurfaces from 20 to 14
10、00C6D 828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-Elongation Appara-tus7D 882 Test Methods for Tensile Properties of Thin PlasticSheeting8D 1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperature9E84 Te
11、st Method for Surface Burning Characteristics ofBuilding Materials10E 96 Test Methods for Water Vapor Transmission of Mate-rials62.2 TAPPI Standards:T461 Flame Resistance of Treated Paper and Paperboard111This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the d
12、irect responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved Oct. 1, 2003. Published October 2003. Originallypublished in 1979. Last previous published in 2003 as C92103.2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 01.05.4An
13、nual Book of ASTM Standards, Vol 01.06.5Annual Book of ASTM Standards, Vol 02.02.6Annual Book of ASTM Standards, Vol 04.06.7Annual Book of ASTM Standards, Vol 15.09.8Annual Book of ASTM Standards, Vol 08.01.9Annual Book of ASTM Standards, Vol 08.03.10Annual Book of ASTM Standards, Vol 04.07.11Availa
14、ble from Technical Association of the Pulp and Paper Industry (TAPPI),P.O. Box 105113,Atlanta, GA30348; 15 Technology Parkway South, Norcross, GA30092.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.T803 Puncture Test of Containerboa
15、rd113. Terminology3.1 DefinitionsDefinitions in Terminology C 168 apply toterms used in this practice, including the word jacket, which isdefined as 9a form of facing applied over insulation9.Incommon use, the terms jacket and jacketing shall be consideredinterchangeable.4. Classification4.1 Type IS
16、emi-rigid, for physical abuse resistance,physical support, and finish.4.1.1 Grade 1: Aluminum sheet metal,4.1.2 Grade 2: Stainless steel sheet metal,4.1.3 Grade 3: Coated steel sheet metal, and,4.1.4 Grade 4: Plastic sheet.4.2 Type II: Flexible for vapor retardance, or physicalsupport or finish comb
17、ination thereof.4.2.1 Grade 1:Laminated multi-layer,4.2.1.1 Class A: Below ambient application; extremely lowpermeance,4.2.1.2 Class B: Below ambient application; very low per-meance,4.2.1.3 Class C: Below ambient application; low per-meance, and4.2.1.4 Class D: Above ambient application; no vapor r
18、e-tarder needed,4.2.2 Grade 2: Plastic film.4.2.2.1 Class A: Below ambient application; extremely lowpermeance,4.2.2.2 Class B: Below ambient application; very low per-meance,4.2.2.3 Class C: Below ambient application; low per-meance, and4.2.2.4 ClassD: Above ambient application; no vapor re-tarder
19、needed.4.3 Grade 3: Fabric4.3.1 No grades; support only, vapor retarder properties notapplicable.5. Significance and Use5.1 Jackets provide one or more of three basic functionswhen applied over thermal insulation:5.1.1 Physical protection, in the form of abuse resistanceand added structural integrit
20、y or support for the insulatingmedium.5.1.2 Resistance to moisture vapor intrusion into the insu-lating medium in those applications where ambient and oper-ating temperatures create a vapor driving force toward the cold(insulated) surface.5.1.3 Exposed finish for the insulation5.2 Type I semi-rigid
21、jackets, in the form of metallic orheavy gauge plastic sheet, are used over insulation on piping orequipment to provide high abuse resistance. In this case, thematerial is also referred to as a protective jacket.5.3 The vapor retarding Type II flexible jacket (Grades 1and 2, Classes A, B and C) is u
22、sed by itself in below ambientservice applications not requiring high abuse resistance. Inthose cases where high abuse resistance is required, it isapplied to the insulation prior to installation of a protectivejacket.5.4 The non vapor-retarding Type II flexible jacket (Grades1 and 2, class D) is us
23、ed by itself in above ambient serviceapplications not requiring high abuse resistance. It may also beused for support of the insulation prior to installation of aprotective jacket in above ambient applications requiring highabuse resistance.5.5 Since semi-rigid protective jackets do not perform avap
24、or retarder function, and flexible jackets do not providehigh abuse resistance, the various materials categorized hereinare commonly used in combination, but not interchangeably.5.6 Vapor-retarding properties are not necessary for systemsoperating above ambient.5.7 In applications where there is a n
25、eed to reduce surfaceemittance, non-metallic jacket, or painted, or film coveredmetal jacket may be specified.5.8 For direct outdoor exposure, certain Type I jackets maybe used. UV resistance is an important consideration with theGrade 4 materials. Consult with the manufacturer for recom-mendations
26、on suitability for these applications.6. Materials and Manufacture6.1 Jackets shall be composed of a single material or alamination of several component The material shall be in theform of rolls or sheets or performed to fit the surface to whichthey are to be applied. The materials may be applied in
27、 the fieldor may be a factory-applied composite with the insulation.6.2 Type I - Semi-rigid Protective: :6.2.1 Semi-rigid jackets consist of metal jackets (Grades1,2, and 3) and heavy gauge plastic jackets (Grade 4).6.2.2 Metal jackets are those whose primary material (usu-ally the component of grea
28、test thickness) is metal, such asaluminum alloy, stainless steel, or aluminum - zinc alloy coatedsteel sheet. Depending upon the metal, it may be available in asmooth mill finish, corrugated, embossed, painted or coveredwith a laminated, protective film. The inner surface (that side incontact with t
29、he insulation) is usually coated or covered withcorrosion inhibiting film.6.2.3 Aluminum Alloy jackets are commonly manufacturedto Specification B 209, Type 3003, 3004, 3104, 3105, 5005,5052, or 1100. Aluminum temper ranges from half hardthrough full hard. Thicknesses generally available are 0.010 t
30、o0.063 in.(0.25 to 1.60 mm) nominal.6.2.4 Stainless steel jackets are manufactured to Specifica-tion A 240, Type 301, 302, 304, or 316 stainless. Thicknessesgenerally available are from 0.010 to 0.032inches (0.25 to 0.81mm) nominal.6.2.5 Coated steel jackets are manufactured to requirementsin Specif
31、ications A 366/A 366M, A 653/A 653M, or A 792/A792M as appropriate. Thickness generally available is 0.016inches (0.41 mm) nominal. Other thicknesses shall be availableas agreed upon between purchaser and seller.6.2.6 Heavy gauge plastic Type I, Grade 4 jackets aremanufactured in plastic films or sh
32、eet with materials such asPolyvinylchloride (PVC) and Polyvinylidenechloride (PVdC)and are available in various thicknesses.6.3 Type II - Flexible:C 921 03a26.3.1 Type II, Grade 1 jackets are made of any of a numberof different combinations of films, foils, cloths, papers andreinforcements.6.3.2 Typ
33、e II, Grade 2 jackets are manufactured from any ofa number of different plastic materials, ranging from soft andflexible to hard and rigid. These materials include, but are notlimited to: polyvinylchloride, polyvinylfluoride, acrylic, andpolyvinylidenechloride. Thicknesses vary with the type ofmater
34、ial and must be appropriate to the intended application.6.3.3 Type II, Grade 3 jackets include, but are not limited to,cotton canvas (typically 4, 6, or 8 oz/sq. yd. (0.14, 0.20, or 0.27kg/sq. m), woven glass fiber yarns, pre-sized glass cloth, andknit, woven, or non-woven synthetic fibers.7. Materi
35、al and Physical Requirements7.1 Type I Semi-rigid Protective Jackets:7.1.1 7.1.1 Material properties for semi-rigid jackets areshown in Table 1.7.2 Type II Flexible Jackets:7.2.1 Physical property requirements that vary by Class orGrade are shown in Table 2. Common requirements for Type IIjackets ar
36、e specified in this section.7.2.2 All jackets shall demonstrate a maximum flame spreadof 25 and smoke developed of 50 when tested on theservice-exposed side for Surface Burning Characteristics (SBC), when tested in accordance with 10.4.7.2.3 Jackets which contain paper or other absorbent mate-rials
37、shall not demonstrate an increase in char length of morethan 20% when tested for flame retardance permanence inaccordance with 10.5.7.2.4 All jackets shall not corrode, delaminate nor showpermeance higher than the maximum for the class, when testedfor elevated temperature and humidity resistance in
38、accordancewith 10.8.7.2.5 All jackets shall not exhibit growth of fungus, or mold,when tested for fungi resistance in accordance with Section10.7.7.2.6 All jackets shall not crack or delaminate when testedfor thermal integrity at the maximum service exposure tem-perature of the jacket in accordance
39、with 10.9.8. Dimensions and Tolerances8.1 Dimensions for roll or sheeted materials shall be asspecified by the purchaser.8.2 Except for metal jackets, tolerance for roll materialsshall be +/-1/8 in. (+/-3 mm) on width and +5,-0 % on length8.3 Except for metal jackets, tolerance for roll materialssha
40、ll be +/-1/8 in. (+/- 3mm) on length and width.8.4 Tolerances for metal jackets shall be as called out inSpeicifactions A240 or B209, as applicable to material.9. Workmanship and Finish9.1 There shall be no defects in materials or workmanshipthat will adversely affect the required performance of the
41、jacket.9.2 There shall be no defects that adversely affect theappearance of the jacket.9.3 There shall be no defects that would affect the ability ofthe user to process material.TABLE 1 Physical Properties for Type I JacketsTYPE I JACKETS GRADE 1AluminumGRADE 2Stainless SteelGRADE 3Coated SteelGRADE
42、 4Plasticthickness in. (mm) 0.0060.050(0.151.27)0.0100.032(0.0250.81)0.016(0.41)0.0100.040(0.251.00)Outside finishoption 1 smooth smooth smoothoption 2 corrugated corrugated corrugated matteoption 3 embossed embossed embossed glossoption 4 painted painted painted coloredoption 5 laminate laminate la
43、minateCorrosion Inhibiting Coatingsoption 1 kraft/PE kraft/PE kraft/PEn/aoption 2 ionomer ionomer ionomeroption 3 coating coating coatingAvailable Metal Alloysof Plastic Polymer Type3003, 3004,3105, 3104,5005, 5052,1100301, 302,304, 3161010, 1015,1020PVCPVdCTABLE 2 Physical Properties for Type II Ja
44、cketsTYPE II JACKETS GRADE 1LaminatedGRADE 2PlasticGRADE 3FabricCLASS APermeanceperms, maxng PA sm, max0.010.580.010.58.CLASS BPermeanceperms, maxng PA sm, max0.021.150.021.15.CLASS CPermeanceperms, maxng PA sm, max0.052.900.052.90.CLASS D no permeancerequirement. . .TensileStrengthlbs/in width, min
45、.N/mm width, min.305.3407.0305.3PunctureResistanceBeach units, minJoules, minA501.50250.75501.50DimensionalChangepercent max 0.50 4.5 0.50AMetric units previously used were cmkg. The conversion from Beach unitswere 1.15 cmkg/Beach unitC 921 03a310. Test Methods10.1 Permeance: Test in accordance with
46、 Test Method E96,(desiccant method at 73F (23 C) and 50% RH)10.2 Tensile Strength:10.2.1 Test the tensile strength of plastic film jackets (TypeII, Grade 2) in accordance with Test Method D 882, withresults reported in pounds per inch width of specimen width(Newtons per millimeter width).10.2.2 Test
47、 the tensile strength of all other jackets inaccordance with Test Method D 828, with results reported inpounds per inch of specimen width (Newtons per millimeterwidth).10.2.2.1 Tested specimens shall be 2 in. (51 mm) width with1 in. (25 mm) between jaws.10.3 10.3 Puncture Resistance: Test in accorda
48、nce withTAPPI T803.10.4 Surface Burning Characteristics. Test in accordancewith Test Method E 84.10.5 Flame Retardance Permanence: Test in accordancewith TAPPI T461.10.6 10.6 Dimensional Stability: Test in accordance withTest Method D 1204.10.6.1 10.6.1 Expose the specimens to a temperature of 150+/
49、- 4 F(66 +/- 2C) for 24hrs.10.7 Fungi Resistance:Test in accordance with Test Method C 1338.10.7.1 Test both sides of laminated products that use dis-similar materials, except metal foil need not be tested.10.7.2 Test either side of plastic film materials.10.7.3 Test three specimens of the selected sample andinspect for growth on any of the three.10.8 Elevated Temperature and Humidity Resistance:Test in accordance with Test Method C 1258. Low-Temperature Resistance.10.9 Thermal Integrity:Test in accordance with Test Method C 1263.11. Sampling11.1 Inspection and quali
