1、Designation:C20812(Reapproved 2017)1Standard Specification forCellulosic Fiber Insulating Board1This standard is issued under the fixed designation C208;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er 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 U.S.Department of Defense.1NOTEEditorially added missing SI conversions in September 2017.1.Sco
3、pe1.1 This specification covers the principal cellulosic fiberinsulating board types,grades,and sizes.Requirements arespecified for composition,construction,physical properties,tolerances,sampling procedures,and test methods.1.2 The values stated in inch-pound units are to be regardedas standard.The
4、 values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 When the installation or use of thermal insulationmaterials,accessories,and systems may pose safety or healthproblems,the manufacturer shall provide the user
5、 appropriatecurrent information regarding any known problems associatedwith the recommended use of the companys products and shallalso recommend protective measures to be employed in theirsafe utilization.The user shall establish appropriate safety andhealth practices and determine the applicability
6、 of regulatoryrequirements prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World
7、Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C165 Test Method for Measuring Compressive Properties ofThermal InsulationsC168 Terminology Relating to Thermal InsulationC209 Test Methods for Cellulosic Fiber Insulating BoardC390 Practice for Sam
8、pling and Acceptance of ThermalInsulation LotsC846 Practice for Application of Cellulosic Fiber InsulatingBoard for Wall SheathingD1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD1554 Terminology Relating to Wood-Base Fiber and Par-ticle Panel MaterialsD21
9、64 Methods of Testing Structural Insulating Roof Deck(Withdrawn 2005)3E72 Test Methods of Conducting Strength Tests of Panelsfor Building Construction2.2 Federal Standard:4900.1 Rev-1 U.S.Dept.of Housing and Urban Develop-ment Minimum Property Standards,One and Two FamilyDwellings43.Terminology3.1 F
10、or definitions of terms used in this specification,seeTerminology C168 and Definitions D1554.3.2 Definitions of Terms Specific to This Standard:3.2.1 cellulosic fiber insulating boarda fibrous-felted,ho-mogeneous panel made from ligno-cellulosic fibers(usuallywood)and having a density of less than 3
11、1 lb/ft3(497 kg/m3)but more than 10 lb/ft3(160 kg/m3).3.2.1.1 DiscussionCellulosic fiber insulating board ischaracterized by an integral bond which is produced byinterfelting of the fibers,but which has not been consolidatedunder heat and pressure as a separate stage in manufacture.Other materials m
12、ay be added during manufacture to improvecertain properties.4.Classification4.1 Insulating board covered by this specification consists ofsix types:1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommittee C16.22 onOrgan
13、ic and Nonhomogeneous Inorganic Thermal Insulations.Current edition approved Sept.1,2017.Published December 2017.Originallyapproved in 1946.Last previous edition approved in 2012 as C208 12.DOI:10.1520/C0208-12R17E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM C
14、ustomer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from the U.S.Department of Housing and Urban Developme
15、nt,Construction Standards Division,HUD Building,Washington,DC 20410.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization establ
16、ished in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.1.1 Type ISound deadening board,for use in wallassemblies to control sound transmissions.4.1.2 Type IIRoof insulation board,for use in variousroofing systems.4.1.2.1 Grade 1Primarily for use under built-up,andmodified bitumen roof systems.4.1.2.2 Grade 2Primarily for use under single-ply,built-up,and modi
