1、Designation:C66709(Reapproved 2014)Standard Specification forPrefabricated Reflective Insulation Systems for Equipmentand Pipe Operating at Temperatures above Ambient Air1This standard is issued under the fixed designation C667;the number immediately following the designation indicates the year ofor
2、iginal 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 for all metalprefabricate
3、d,reflective insulation systems for equipment andpiping operating in air at temperatures above ambient.Typicalapplications are in nuclear power-generating plants and indus-trial plants.1.2 Reflective insulation is thermal insulation that reducesradiant heat transfer across spaces by the use of surfa
4、ces ofhigh reflectance and low emittance.1.3 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.1.4 This standard does not purport to address
5、 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:2C168 Terminology Rela
6、ting to Thermal InsulationC335 Test Method for Steady-State Heat Transfer Propertiesof Pipe InsulationC411 Test Method for Hot-Surface Performance of High-Temperature Thermal InsulationC835 Test Method for Total Hemispherical Emittance ofSurfaces up to 1400CC854 Test Method for Resistance to Externa
7、l Loads onMetal Reflective Pipe Insulation(Withdrawn 1997)3C1045 Practice for Calculating Thermal Transmission Prop-erties Under Steady-State ConditionsC1058 Practice for Selecting Temperatures for Evaluatingand Reporting Thermal Properties of Thermal InsulationC1061 Test Method for Thermal Transmis
8、sion Properties ofNon-Homogeneous Insulation Panels Installed Vertically(Withdrawn 1995)3C1371 Test Method for Determination of Emittance ofMaterials Near Room Temperature Using Portable Emis-someters3.Terminology3.1 Definitions:3.1.1 Terms relating to thermal insulation materials andtesting are in
9、accordance with Terminology C168.3.2 Definitions of Terms Specific to This Standard:3.2.1 convection stopsseals used to reduce convectionlosses.3.2.2 end supportsstructural members placed at the end ofa unit of insulation and fastened to both the inner and outercase.3.2.2.1 DiscussionThe primary pur
10、pose of the end sup-ports is to increase the structural integrity of the unit.3.2.3 inner casethe innermost sheet of the unit of insula-tion(closest to the hot surface).3.2.3.1 Discussion The inner case may perform structuralfunctions in addition to its thermal functions.3.2.4 insulation assemblyan
11、assembly of insulation unitsarranged and secured together in a prescribed order thatcomprises the complete insulation for a vessel,pump,pipeline,or other component for a single design objective.3.2.5 insulationsystemacollectionofinsulationassemblies,that when secured together in a prescribed order,c
12、omprises the complete insulation for a vessel,pump,pipeline,or other component for a single design objective.3.2.6 lap strapsstrips that overlap a longitudinal or cir-cumferential joint in the insulation which aligns adjacentinsulation units and may also serve to restrict air infiltrationand convect
13、ion losses and to shed external falling water.3.2.6.1 DiscussionThe lap straps may be integral with onepiece of the outer case or separate strips secured to it.1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommittee C1
14、6.21 onReflective Insulation.Current edition approved Feb.1,2014.Published March 2014.Originallyapproved in 1992.Last previous edition approved in 2009 as C667-09.DOI:10.1520/C0667-09R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm
15、.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.
16、United States1 3.2.7 outer casethe outermost sheet or the unit of insula-tion(farthest from the hot surface).It usually performsstructural functions in addition to its thermal functions.3.2.8 penetrationsopenings in a unit of insulation fromthe cold surface through to the hot surface.3.2.9 reflective linersthose reflective sheets or foil inter-posed between the inner and outer case to reflect radiantenergy,to minimize emission of radiant energy,and to restrictinternal convection.3.2.10 thickness