1、Designation:C1676/C1676M14Standard Specification forMicroporous Thermal Insulation1This standard is issued under the fixed designation C1676/C1676M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in
2、 parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the composition,physicalproperties,and product forms of microporous thermal insula-tion for use on surfaces at temperature
3、s from 80C 176F upto 1150C 2102F,unless otherwise agreed upon by themanufacturer and purchaser.1.2 This specification only covers microporous thermalinsulation comprising compacted powder,fibers and opacifiers.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately
4、as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,as
5、sociated 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.Referenced Documents2.1 ASTM Standards:2C165 Test Method for Measuring Compressive Properties ofT
6、hermal InsulationsC168 Terminology Relating to Thermal InsulationC177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusC201 Test Method for Thermal Conductivity of RefractoriesC302 Test Method for Density and Dimension
7、s of Pre-formed Pipe-Covering-Type Thermal InsulationC303 Test Method for Dimensions and Density of Pre-formed Block and BoardType Thermal InsulationC335 Test Method for Steady-State Heat Transfer Propertiesof Pipe InsulationC356 Test Method for Linear Shrinkage of Preformed High-Temperature Thermal
8、 Insulation Subjected to SoakingHeatC390 Practice for Sampling and Acceptance of ThermalInsulation LotsC518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC585 Practice for Inner and Outer Diameters of ThermalInsulation for Nominal Sizes of Pipe
9、and TubingC665 Specification for Mineral-Fiber Blanket Thermal Insu-lation for Light Frame Construction and ManufacturedHousingC795 Specification for Thermal Insulation for Use in Con-tact with Austenitic Stainless SteelC1045 Practice for Calculating Thermal Transmission Prop-erties Under Steady-Sta
10、te ConditionsC1104/C1104M Test Method for Determining the WaterVapor Sorption of Unfaced Mineral Fiber InsulationE84 Test Method for Surface Burning Characteristics ofBuilding Materials3.Terminology3.1 DefinitionsFor definitions used in this specification,see Terminology C168.3.2 Definitions of Term
11、s Specific to This Standard:3.2.1 flexible microporous insulation,n nsulation that iscapable of conforming to a non planar surface being insulatedwithout damage over a specified temperature range.3.2.2 rigid microporous insulation,ninsulation that willbe damaged when forced to conform to a non-plana
12、r surfacebeing insulated.4.Classification4.1 Microporous thermal insulation covered by this specifi-cation shall be classified into three types as shown in Table 1.Type classification is based on the physical form in which theinsulation is manufactured.4.2 Microporous thermal insulation covered by t
13、his specifi-cation shall be classified into four grades as shown in Table 2.Grade classification is based on the maximum recommendeduse temperature of the insulation.1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommit
14、tee C16.20 onHomogeneous Inorganic Thermal Insulations.Current edition approved Sept.1,2014.Published January 2015.originallyapproved in 2008.last previous edition approved in 2008 as C167608.DOI:10.1520/C1676-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Custo
15、mer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.3Grade 2B microporous insulation is hydro
16、phobic andhas been chemically treated to make the material water-repellant.4.3.1 Grade 2B,hydrophobic insulation,will retain its waterrepellency up to 250 C 482 F.At higher temperatures,thetreatment will degrade at a rate which depends on the tempera-ture applied.The user shall contact the manufacturer forspecific information on the lifetime of the treatment at highertemperatures than 250 C 482 F.4.3.2 Grade 2B,hydrophobic insulation,which has beenheated to the point where the hydrophobic treatm
