ASTM_C_1146_-_09_2013.pdf

Designation:C114609(Reapproved 2013)Standard Guide forPrefabricated Panel and Hbar Insulation Systems forVessels,Ducts and Equipment Operating at TemperaturesAbove Ambient Air1This standard is issued under the fixed designation C1146;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.1.Scope1.1 This guide describes design,fabrication,shipping,handling,jobsite storage,and installation of prefabricatedpanel and H-Bar insulation systems for vessels,ducts,andequipment operating at temperatures above ambient.Typicalapplications include,but are not limited to,air and gas ducts,steam generating units,air quality control systems,fans,storage tanks,process vessels,and coke drums1.2 The insulation described herein is limited to systemsconsisting of insulating units specially designed to fit thesurfaces to be insulated,and engineered for the service andenvironmental requirements.The insulation unit may alsoinclude special design features which facilitate the removal andreplacement for maintenance and inspection.1.3 When prefabricated panels are used,each insulation unitfactory preassembled and typically comprised of the insulation,an outer lagging to which the insulation is attached,an innerretaining wire mesh,optional foil lining,and means formechanically securing multiple units together in an assembly.1.4 H-bar systems represent insulation units that are typi-cally comprised of the insulation,outer lagging and a uniquelyconfigured subgirt design which both supports the insulationand provides a means for mechanically securing multiple unitstogether in an assembly.The design of the subgirt creates an“H”configuration which is fabricated from light gauge sheetmetal.The subgirt components consist of:(1)a“J-bar”shapewhich frames the perimeter edges of the surface to beinsulated,holds the insulation in place along the outer edge andprovides a screen attachment point for the outer lagging;(2)the“H-bar”shape is placed at defined intervals.The web section ofthe“H-bar”supports the insulation while the exterior flangeallows for the outer lagging to be attached with threadedfasteners.1.5 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.1.6 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.NOTE1When prefabricated panel or H-Bar insulation systems arespecified,Test Methods C167,C177 and C1061,Material SpecificationsA36/A36M,A463/A463M,B209,C612,and Terminology C168 shouldbe considered.2.Referenced Documents2.1 ASTM Standards:2A36/A36M Specification for Carbon Structural SteelA463/A463M Specification for Steel Sheet,Aluminum-Coated,by the Hot-Dip ProcessB209 Specification for Aluminum and Aluminum-AlloySheet and PlateC167 Test Methods for Thickness and Density of Blanket orBatt Thermal 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 ApparatusC612 Specification for Mineral Fiber Block and BoardThermal InsulationC1061 Test Method for Thermal Transmission Properties ofNon-Homogeneous Insulation Panels Installed Vertically(Withdrawn 1995)33.Terminology3.1 Terminology C168 shall be considered as applying tothe terms in this specification.1This guide is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.40 on InsulationSystems.Current edition approved Nov.1,2013.Published January 2014.Originallyapproved in 1989.Last previous edition approved in 2009 as C1146 09.DOI:10.1520/C1146-09R13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2 Definitions of Terms Specific to This Standard:3.2.1 convection barrier(flue stop)barriers to internal airflow sometimes refered to as“chimney effect”)which areplaced between the inner liner and the hot surface beinginsulated.The barriers are generally a combination of sheetmetal and with the insulation material mechanically attached.Convection barriers are required when the insulation is not indirect contact with