1、Designation: C 921 09Standard 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 o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 applie
3、d 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 application
4、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. The values given in parentheses a
5、re mathematicalconversions to SI units that are provided for information onlyand are not considered 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 this standard to establish appro-priate safety
6、 and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A 240/A 240M Specification for Chromium andChromium-Nickel Stainless Steel Plate, Sheet, and Stripfor Pressure Vessels and for General ApplicationsA 336/A 336M Spe
7、cification for Alloy Steel Forgings forPressure and High-Temperature PartsA 653/A 653M Specification for Steel Sheet, Zinc-Coated(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)by the Hot-Dip ProcessA 792/A 792M Specification for Steel Sheet, 55 %Aluminum-Zinc Alloy-Coated by the Hot-Dip Proces
8、sB 209 Specification for Aluminum and Aluminum-AlloySheet and PlateC 168 Terminology Relating to Thermal InsulationC 390 Practice for Sampling and Acceptance of ThermalInsulation LotsC 921 Practice for Determining the Properties of JacketingMaterials for Thermal InsulationC 1258 Test Method for Elev
9、ated Temperature and Humid-ity Resistance of Vapor Retarders for InsulationC 1263 Test Method for Thermal Integrity of Flexible WaterVapor RetardersC 1338 Test Method for Determining Fungi Resistance ofInsulation Materials and FacingsC 1423 Guide for Selecting Jacketing Materials for ThermalInsulati
10、onD 774/D 774M Test Method for Bursting Strength of PaperD 828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-Elongation ApparatusD 882 Test Method for Tensile Properties of Thin PlasticSheetingD 1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplast
11、ic Sheeting or Film at ElevatedTemperatureE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 96/E 96M Test Methods for Water Vapor Transmission ofMaterials2.2 TAPPI Standards:T461 Flame Resistance of Treated Paper and Paperboard33. Terminology3.1 DefinitionsDefinitions in Term
12、inology C 168 apply toterms used in this practice, including the word jacket, which is1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved April 1, 2009.
13、 Published April 2009. Originallyapproved in 1979. Last previous approved in 2003 as C 92103a.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
14、 Summary page onthe ASTM website.3Available from Technical Association of the Pulp and Paper Industry (TAPPI),15 Technology Parkway South, Norcross, GA 30092, http:/www.tappi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.define
15、d as 9a form of facing applied over insulation9.Incommon use, the terms jacket and jacketing shall be consideredinterchangeable.4. Classification4.1 Type ISemi-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 m
16、etal,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 combination 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 am
17、bient 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 re-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 ap
18、plication; 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 needed.4.3 Grade 3: Fabric4.3.1 No grades; support only, vapor retarder properties notapplicable.5. Significance and Use5.1 Jackets provide one
19、or more of three basic functionswhen applied over thermal insulation:5.1.1 Physical protection, in the form of abuse resistanceand added structural integrity or support for the insulatingmedium.5.1.2 Resistance to moisture vapor intrusion into the insu-lating medium in those applications where ambie
20、nt 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 jackets, in the form of metallic orheavy gauge plastic sheet, are used over insulation on piping orequipment to provide high abuse resistance. I
21、n 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 used by itself in below ambientservice applications not requiring high abuse resistance. Inthose cases where high abuse resistance is required, i
22、t 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 used by itself in above ambient serviceapplications not requiring high abuse resistance. It may also beused for support of the insulation prior to
23、 installation of aprotective jacket in above ambient applications requiring highabuse resistance.5.5 Since semi-rigid protective jackets do not perform avapor retarder function, and flexible jackets do not providehigh abuse resistance, the various materials categorized hereinare commonly used in com
24、bination, but not interchangeably.5.6 Vapor-retarding properties are not necessary for systemsoperating above ambient.5.7 In applications where there is a need to reduce surfaceemittance, non-metallic jacket, or painted, or film coveredmetal jacket may be specified.5.8 For direct outdoor exposure, c
25、ertain Type I jackets maybe used. UV resistance is an important consideration with theGrade 4 materials. Consult with the manufacturer for recom-mendations on suitability for these applications.6. Materials and Manufacture6.1 Jackets shall be composed of a single material or alamination of several c
26、omponent 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 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 met
27、al 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 greatest thickness) is metal, such asaluminum alloy, stainless steel, or aluminum - zinc alloy coatedsteel sheet. Depending upon the metal, it may b
28、e available in asmooth mill finish, corrugated, embossed, painted or coveredwith a laminated, protective film. The inner surface (that side incontact with the insulation) is usually coated or covered withcorrosion inhibiting film.6.2.3 Aluminum Alloy jackets are commonly manufacturedto Specification
29、 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 to0.063 in.(0.25 to 1.60 mm) nominal.6.2.4 Stainless steel jackets are manufactured to Specifica-tion A 240/A 240M, Type 301, 302, 304, or 316 st
30、ainless.Thicknesses generally available are from 0.010 to 0.032inches(0.25 to 0.81 mm) nominal.6.2.5 Coated steel jackets are manufactured to requirementsin Specifications A 366/A 366M, A 653/A 653M,orA 792/A 792M as appropriate. Thickness generally available is 0.016inches (0.41 mm) nominal. Other
31、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 sheet with materials such asPolyvinylchloride (PVC) and Polyvinylidenechloride (PVdC)and are available in various thicknesses.6.3 Type II -
32、Flexible:6.3.1 Type II, Grade 1 jackets are made of any of a numberof different combinations of films, foils, cloths, papers andreinforcements.6.3.2 Type II, Grade 2 jackets are manufactured from any ofa number of different plastic materials, ranging from soft andflexible to hard and rigid. These ma
33、terials include, but are notC921092limited to: polyvinylchloride, polyvinylfluoride, acrylic, andpolyvinylidenechloride. Thicknesses vary with the type ofmaterial and must be appropriate to the intended application.6.3.3 Type II, Grade 3 jackets include, but are not limited to,cotton canvas (typical
34、ly 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. Material 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
35、 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 are specified in this section.7.2.2 All jackets shall demonstrate a maximum flame spreadof 25 and smoke developed of 50 when tested on theservi
36、ce-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 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
37、 jackets shall not corrode, delaminate nor showpermeance higher than the maximum for the class, when testedfor elevated temperature and humidity resistance in accordancewith 10.8.7.2.5 All jackets shall not exhibit growth of fungus, or mold,when tested for fungi resistance in accordance with Section
38、10.7.7.2.6 All jackets shall not crack or delaminate when testedfor thermal integrity at the maximum service exposure tem-perature of the jacket in accordance 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
39、 jackets, tolerance for roll materialsshall be 618 in. (63 mm) on width and +5,-0 % on length8.3 Except for metal jackets, tolerance for roll materialsshall be 618 in. (6 3mm) on length and width.8.4 Tolerances for metal jackets shall be as called out inSpeicifactions A 240 or B 209, as applicable t
40、o material.9. Workmanship and Finish9.1 There shall be no defects in materials or workmanshipthat will adversely affect the required performance of thejacket.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 of
41、the user to process material.10. Test Methods10.1 Permeance: Test in accordance with Test MethodE 96/E 96M, (desiccant method at 73F (23 C) and 50% RH)TABLE 1 Physical Properties for Type I JacketsTYPE I JACKETS GRADE 1AluminumGRADE 2Stainless SteelGRADE 3Coated SteelGRADE 4Plasticthickness in. (mm)
42、 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 laminateCorrosion Inhibiting
43、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 JacketsTYPE II JACKETS GRADE
44、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.N/mm width, min.305.3407.0
45、305.3Burst Strength,minpsi(kPa)55(380)35(240)55(380)DimensionalChangepercent max 0.50 4.5 0.50C92109310.2 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(
46、Newtons per millimeter width).10.2.2 Test 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
47、Burst StrengthTest in accordance with Test MethodD 774/D 774M.10.4 Surface Burning Characteristics. Test in accordancewith Test Method E 84.10.5 Flame Retardance Permanence: Test in accordancewith TAPPI T461.10.6 Dimensional Stability: Test in accordance with TestMethod D 204.10.6.1 Expose the speci
48、mens to a temperature of 150 6 4F(66 6 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
49、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 qualification shall be in accordance withPractice C 390. Other provisions for sampling can be agreedupon between the purchaser, seller, and manufacturer.12. Certification12.1 When specified in the purchase order or contract, thepurchaser shall be furnished certification that sa
