ASTM_C_921_-_10_2015.pdf

Designation:C92110(Reapproved 2015)Standard Practice forDetermining the Properties of Jacketing Materials forThermal Insulation1This standard is issued under the fixed designation C921;the number immediately following the designation indicates the year oforiginal 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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice covers jackets applied over thermal insu-lation on piping and equipment,including materials appliedsolely for physical protection,and materials applied as vaporretarders.1.2 Thispracticeprovidesmaterialandphysicalrequirements,or both,for jackets.Guidance in selecting theproper jacket for a given application can be found in GuideC1423.1.3 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 are 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate,Sheet,and Strip for PressureVessels and for General ApplicationsA336/A336M Specification for Alloy Steel Forgings forPressure and High-Temperature PartsA653/A653M Specification for Steel Sheet,Zinc-Coated(Galvanized)or Zinc-Iron Alloy-Coated(Galvannealed)by the Hot-Dip ProcessA792/A792M SpecificationforSteelSheet,55%Aluminum-Zinc Alloy-Coated by the Hot-Dip ProcessB209 Specification for Aluminum and Aluminum-AlloySheet and PlateC168 Terminology Relating to Thermal InsulationC390 Practice for Sampling and Acceptance of ThermalInsulation LotsC921 Practice for Determining the Properties of JacketingMaterials for Thermal InsulationC1258 Test Method for Elevated Temperature and HumidityResistance of Vapor Retarders for InsulationC1263 Test Method for Thermal Integrity of Flexible WaterVapor RetardersC1338 Test Method for Determining Fungi Resistance ofInsulation Materials and FacingsC1423 Guide for Selecting Jacketing Materials for ThermalInsulationD774/D774M Test Method for Bursting Strength of Paper(Withdrawn 2010)3D828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-ElongationApparatus(Withdrawn 2009)3D882 Test Method for Tensile Properties of Thin PlasticSheetingD1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE96/E96M Test Methods for Water Vapor Transmission ofMaterials2.2 TAPPI Standards:T461 Flame Resistance of Treated Paper and Paperboard41This 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 Sept.1,2015.Published October 2015.Originallyapproved in 1979.Last previous edition approved in 2010 as C92110.DOI:10.1520/C0921-10R15.2For 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 Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Technical Association of the Pulp and Paper Industry(TAPPI),15 Technology Parkway South,Suite 115,Peachtree Corners,GA 30092,http:/www.tappi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 DefinitionsDefinitions in Terminology C168 apply toterms used in this practice,including the word jacket,which isdefined as a form of facing applied over insulation.Incommon use,the terms jacket and jacketing shall be consideredinterchangeable.4.Classification4.1 Type ISemi-rigid,for physical abuse resistance,physi-cal 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 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 ambient application;very lowpermeance,4.2.1.3 ClassC:Belowambientapplication;lowpermeance,and4.2.1.4 Class D:Above am