1、Designation:E281615aAn American National StandardStandard Test Methods forFire Resistive Metallic HVAC Duct Systems1This standard is issued under the fixed designation E2816;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONHeating,Ventilation,Air Conditioning(HVAC)duct systems may be subjected to fire-exposureconditions.ISO 6944 is a standard
3、 test method used to evaluate ventilation ducts.However,ISO 6944does not address all of the fire resistive attributes deemed necessary by some authorities havingjurisdiction,for example,(1)the fire-resistive,combustibility,flame spread and smoke generation,anddurability properties of the fire-resist
4、ive materials protecting the HVAC duct,(2)the transition fromthe horizontal to a vertical HVAC duct,(3)the attachment of the HVAC ducts supports to thefire-separating elements,(4)the termination of an HVAC duct system and the protection of its ends,(5)the effects of rapid cooling and erosion upon th
5、e HVAC duct system,(6)the use of fire dampersand(7)the effect of the HVAC duct system on its supporting construction.Many types of fire-resistivematerials are used to protect HVAC ducts.These fire-resistive materials are either applied to HVACducts in the field or are fabricated as an integral part
6、of the HVAC duct system when shipped from thefactory.Evaluating fire-resistive materials used to protect a HVAC duct from fire is an aid forpredicting their fire performance and helps to establish uniformity in requirements of variousauthorities.To do this it is necessary that the fire-resistance pr
7、operties of HVAC ducts protected withfire-resistive materials be measured and specified according to a common standard expressed in termsthat are applicable alike to a wide variety of materials,situations,and conditions of exposure.1.ScopeNOTE1Use of the standard designation ISO 6944 refers to both
8、ISO6944:1985 and ISO 6944-1:2008.1.1 These test methods evaluate the fire-resistive materialsand the HVAC duct systems surface burning characteristics,non-combustibility,fire resistance,durability,and fire-engulfment with horizontal and vertical through-penetrationfirestops.NOTE2The intent of these
9、test methods is to provide authoritieshaving jurisdiction a means to evaluate the fire performance of HVACduct systems to enable their application and use.1.2 These test methods evaluate the fire performance ofHVAC ducts,including both supply(pressurized:Condition A Horizontal and Condition B Vertic
10、al)and return(exhaust:Condition C Horizontal and Condition D Vertical).1.3 These test methods evaluate the ability of a HVAC ductsystem to resist the spread of fire from one compartment toother compartments separated by a fire resistance rated con-struction when the HVAC duct system is exposed to fi
11、re underone or more of the following conditions:1.3.1 Condition AFire exposure from the outside of thehorizontal HVAC duct system without openings,1.3.2 Condition BFire exposure from the outside of thevertical HVAC duct system without openings,1.3.3 Condition CFire exposure from the outside with hot
12、gases entering the inside of the horizontal HVAC duct systemwith unprotected openings,andNOTE3Unprotected openings are openings that are not protected byfire dampers.1.3.4 Condition DFire exposure from the outside with hotgases entering the inside of the vertical HVAC duct systemwith unprotected ope
13、nings.1.4 These test methods provide a means for determining thefire-resistance of vertical and horizontal HVAC duct systems,when subjected to the standard time-temperature curve of TestMethods E119.1.4.1 Condition AThese test methods provide a means forevaluating a horizontal HVAC duct system,witho
14、ut openingsexposed to fire,passing through a vertical fire-separatingelement.1.4.2 Condition BThese test methods provide a means forevaluating a vertical HVAC duct system,without openings1These test methods are under the jurisdiction of ASTM Committee E05 on FireStandards and are the direct responsi
15、bility of Subcommittee E05.11 on FireResistance.Current edition approved Oct.1,2015.Published November 2015.Originallyapproved in 2011.Last previous edition approved in 2015 as E2816-15.DOI:10.1520/E2816-15A.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-29
16、59.United States1 exposed to fire and outfitted with a horizontal connection,passing through a horizontal fire-separating element.1.4.3 Condition CThese test methods provide a means forevaluating a horizontal HVAC duct system,with unprotectedopenings exposed to fire,passing through a vertical fire-separating element.1.4.4 Condition DThese test methods provide a means forevaluating a vertical HVAC duct system with a horizontalconnection,and with unprotected openings exposed to fire,passing throug
