1、Designation:C166813aStandard Specification forExternally Applied Reflective Insulation Systems on RigidDuct in Heating,Ventilation,and Air Conditioning(HVAC)Systems1This standard is issued under the fixed designation C1668;the number immediately following the designation indicates the year oforigina
2、l adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements and physicalproperties of refl
3、ective insulation systems applied externally toRigid Heating,Ventilation,and Air Conditioning(HVAC)ductsystems operating at or below 250F(121.1 C).Theseinsulation systems consist of one or more low-emittancesurfaces,such as metallic foil or metallic deposits,mounted onsubstrates to produce reflectiv
4、e air spaces.Reflective insulationsystems derive thermal performance from surfaces with anemittance of no greater than 0.1 facing enclosed air spaces.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that a
5、re provided for information onlyand are not considered standard.1.3 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-
6、bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC335 Test Method for Steady-State Heat Transfer Propertiesof Pipe InsulationC390 Practice for Sampling and Acceptance of ThermalInsulation LotsC411 Test Method for H
7、ot-Surface Performance of High-Temperature Thermal InsulationC1045 Practice for Calculating Thermal Transmission Prop-erties Under Steady-State ConditionsC1258 Test Method for Elevated Temperature and HumidityResistance of Vapor Retarders for InsulationC1338 Test Method for Determining Fungi Resista
8、nce ofInsulation Materials and FacingsC1371 Test Method for Determination of Emittance ofMaterials Near Room Temperature Using Portable Emis-sometersE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE2231 Practice fo
9、r Specimen Preparation and Mounting ofPipe and Duct Insulation Materials to Assess SurfaceBurning Characteristics2.2 Other Test Method:TAPPI Standard T-512 sp-02 Creasing of Flexible PackagingMaterial Paper Specimens for Testing33.Terminology3.1 Definitions:3.1.1 Unless otherwise noted,the terms use
10、d in this speci-fication conform to Terminology C168.3.2 Definitions of Terms Specific to This Standard:3.2.1 HVAC ductsas pertaining to this standard,ductshaving rigid rectangular or circular cross-section used totransfer air from the air handling equipment to the conditionedspace and return.3.2.2
11、insulation spacersmaterial used to form enclosed airspaces that are interior to the reflective insulation system.3.2.3 reflective insulationthermal insulation consisting ofone or more low emittance surfaces,bounding one or moreenclosed air space(s).C1684.Classification4.1 Products covered by this sp
12、ecification are classifiedaccording to the substrate material and have the physicalproperties as listed in Table 1.1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommittee C16.21 onReflective Insulation.Current edition
13、approved Nov.1,2013.Published January 2014.Originallyapproved in 2009.Last previous edition approved in 2013 as C166813.DOI:10.1520/C166813A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume i
14、nformation,refer to the standards Document 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA
15、 19428-2959.United States1 4.1.1 Type AProduct with polyethylene foam substrate.4.1.2 Type BProduct with polyethylene bubble pack sub-strate.4.1.3 Type CProduct with fiberglass substrate.4.1.4 Type DProduct with polyester fiber substrate.4.1.5 Type EProduct with kraft paper substrate.5.Ordering Info
16、rmation5.1 Specify the required thermal resistance.5.2 Specify the number of layers of insulation,width,thickness of the insulation system and the configuration of theduct(s)to be insulated.5.3 Special markings,when required,shall be specified.5.4 Special performance requirements,when required.6.Materials and Manufacture6.1 Reflective insulation shall consist of low-emittancesurface(s)with substrates and adhesives required to meet thespecified thermal performance and physical properties.Airspace
