1、Designation: E 2336 04An American National StandardStandard Test Methods forFire Resistive Grease Duct Enclosure Systems1This standard is issued under the fixed designation E 2336; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, th
2、e year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe protection of grease ducts under fire exposure conditions is an item of importance in securingconstruct
3、ions that are safe, and that are not a menace to neighboring construction nor to the public.Recognition of this is registered in the codes of many authorities, municipal and other agencies. Manytypes of enclosure materials are used to protect grease ducts. Normally, these enclosure materials areeith
4、er applied to grease ducts in the field or are fabricated as part of the grease duct when shipped fromthe factory. Evaluating enclosure materials used to protect a grease duct from fire is an aid forpredicting their fire performance and promotes uniformity in requirements of various authorities. Tod
5、o this it is necessary that the fire-endurance properties of enclosure materials be measured andspecified according to a common standard expressed in terms that are applicable alike to a wide varietyof materials, situations, and conditions of exposure.1. ScopeNOTE 1The majority of this standard is b
6、ased on the Model BuildingCode Evaluation Service2Acceptance Criteria titled ACCEPTANCECRITERIA FOR GREASE DUCT ENCLOSURE ASSEMBLIES, AC101,which was created in 1994. Numerous design listings and labeledmaterials exist based on the provisions of this standard.1.1 These test methods evaluate the encl
7、osure materials andthe grease duct enclosure systems using the following testmethods: noncombustibility, fire resistance, durability, internalfire, and fire-engulfment with a through-penetration fire stop.1.2 These test methods prescribe a standardized fire expo-sure for comparing the test results o
8、f the enclosure materialsand grease duct enclosure systems. The results of these tests areone factor in assessing predicted fire performance of greaseduct enclosure systems. Using these test results to predict theperformance of actual grease duct enclosure systems requiresthe evaluation of test cond
9、itions.1.3 The values stated in inch-pound units are to be regardedas the standard. The SI values given in parentheses are forinformation only.1.4 The text of these test methods references notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and
10、figures) shall not beconsidered as requirements of the fire test response standard.1.5 These test methods are used to measure and describe theresponse of materials, products, or assemblies to heat andflame under controlled conditions, but does not by itselfincorporate all factors required for fire h
11、azard or fire riskassessment of the materials, products, or assemblies underactual fire conditions.1.6 These test methods do not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of these test methods to establishappropriate safety and
12、 health practices and to determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3C 518 Test Method for Steady state Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Heat Flow Meter ApparatusC 569 Method of Test for Indent
13、ation Hardness of Pre-formed Thermal InsulationsE 84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 119 Test Methods for Fire Tests of Building Constructionand MaterialsE 136 Test Method for Behavior of Materials in a VerticalTube Furnace at 750CE 176 Terminology of Fire Stand
14、ards1This test method is under the jurisdiction of ASTM Committee E05 on FireStandards and is the direct responsibility of Subcommittee E05.11 on FireResistance.Current edition approved May 1, 2004. Published May 2004.2ICC Evaluation Service, Inc. (ICBO Evaluation Service, Inc.) 5360 WorkmanMill Roa
15、d, Whittier, CA 90601-22983For 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.1Copyright ASTM International, 100
16、Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.E 631 Terminology of Building ConstructionsE 814 Test Method for Fire Tests of Through-PenetrationFire Stops2.2 Other Documents:UL 385 Standard for Play Pipes for Water Supply Testing inFire-Protection Service43. Termino
17、logy3.1 Definitions: For the purpose of this fire test responsestandard, the definitions given in Terminologies E 176 andE 631, together with the following, shall apply:3.1.1 enclosure material, nthe product applied to thegrease duct to provide fire resistance.3.1.2 fire-separating element, nfloors,
18、 walls, and parti-tions having a period of fire resistance determined in accor-dance with fire resistance test methods such as Test MethodsE 119.3.1.3 fire side, adjthe face of the test assembly or testspecimen exposed to the heat or flame or both of the testapparatus.3.1.4 grease duct (also known a
19、s kitchen exhaust greaseduct), na tube or conduit utilized for conveying air.3.1.4.1 DiscussionIt is usually equipped with an accessopening for cleaning the orifice.3.1.5 grease duct enclosure system, nconsists of thegrease duct, an enclosure material(s), a support and fasteningsystem, and an access
20、 opening for cleaning the grease duct.3.1.6 orifice, nthe continuous hollow area or openingwithin the grease duct or combustion chamber.3.1.7 supporting construction, nthe arrangement of build-ing sections forming the fire-separating elements into whichthe grease duct enclosure system is installed.3
21、.1.8 test assembly, nthe complete assembly composed ofa test specimen(s) together with its supporting construction.3.1.9 test specimen, na material, product, or assemblageof a specific design, composition, density, and dimensions.3.1.9.1 Discussionthe enclosure material or the greaseduct enclosure s
22、ystem are examples of test specimens.3.1.10 unexposed side, nthe face or part not directlyexposed to the heat or flame or both of the test apparatus.3.1.11 unexposed surface thermocouple, ntemperature-measuring device placed on the unexposed side.4. Summary of Test Method4.1 Representative test spec
23、imens of the enclosure materialor the grease duct enclosure system are subjected to thefollowing tests. These test methods describe the following testsequence and procedures:4.1.1 A noncombustibilty test, Test Method E 136, demon-strates the enclosure materials ability to resist combustion at astand
24、ardized temperature and duration.4.1.2 A fire resistance test, Test Methods E 119, illustratesthe ability of the enclosure material to resist the effects of firewhen applied in a vertical application.4.1.3 A durability test intended to simulate the effects oflong-term exposure of typical in-service
25、conditions on thethermal transmission qualities of the enclosure materials whensubjected to a modified version of Test Method C 518.4.1.4 An internal fire test uses two standardized fire expo-sures occurring inside the grease duct. Both tests illustrate theenclosure materials ability to resist therm
26、al transmission ofheat to the unexposed side in a horizontal application. The firststandardized fire exposure is intended to simulate long termexposure of the enclosure material to a standardized servicecondition. The second standardized fire exposure is intended tosimulate a standardized grease fir
27、e.4.1.5 A fire-engulfment test uses a standardized fire expo-sure, the time temperature curve of Test Methods E 119, tosimulate a fire occurring on the outside of the grease duct, anddemonstrates the ability of the grease duct enclosure system toremain intact without a through opening. The fire-engu
28、lfmenttest also tests the fastening methods used to secure theenclosure material to the grease duct and the supportingsystem. The fire-engulfment test also provides a means to testa through-penetration fire stop to determine its compatibilitywith the grease duct enclosure system.5. Significance and
29、Use5.1 These test methods are intended to evaluate the abilityof the grease duct enclosure system to do the following:5.1.1 Resist the effects of a standardized fire exposure,5.1.2 Retain its integrity, or5.1.3 Exhibit both properties dependent upon the type oftest assembly involved during a predete
30、rmined test exposure.5.2 These test methods provide for the following measure-ments and evaluations where applicable:5.2.1 Capability of the enclosure material to resist flaming(combustion) when exposed to 1382F (750C).5.2.2 Loadbearing ability of the tested support system andfastening system to car
31、ry the load of the grease duct enclosuresystem during a standardized fire-engulfment test.5.2.3 Ability of a fire stop to meet the requirements of TestMethod E 814 when used with a grease duct enclosure system.5.2.4 Ability of the enclosure material to resist the passageof flames and hot gases durin
32、g a standardized fire resistancetest and a standardized internal fire test.5.2.5 Transmission of heat through the grease duct and theenclosure material(s) during a standardized fire resistance testand a standardized internal fire test.5.2.6 Ability of the grease duct enclosure system to resistthe pa
33、ssage of water during a standardized hose stream test.5.2.7 Comparative measurement of temperature aging of theenclosure material(s) when subjected to standardized cyclicthermal transmissions.5.3 These test methods do not provide the following:5.3.1 Full information as to performance of the enclosur
34、ematerial or the grease duct enclosure system constructed withcomponents, densities, or dimensions other than those tested.5.3.2 Evaluation of the degree by which the enclosurematerial or grease duct enclosure system contributes to the firehazard by generation of smoke, toxic gases, or other product
35、sof combustion.4Available from Underwriters Laboratories (UL), Corporate Progress, 333Pfingsten Rd., Northbrook, IL 60062.E23360425.3.3 Measurement of the degree of control or limitation ofthe passage of smoke or products of combustion through thegrease duct enclosure system.5.3.4 Measurement of fla
36、me spread over the surface of thegrease duct enclosure system.NOTE 2The information in 5.3.2-5.3.4 is usually determined by othersuitable test methods. For example, 5.3.4 is typically determined usingTest Method E 84.5.4 In these test methods, the test specimens are subjected toone or more specific
37、tests under laboratory conditions. Whendifferent test conditions are substituted or the end-use condi-tions are changed, it is not always possible by, or from, thesetest methods to predict changes to the characteristics measured.Therefore, the results of these laboratory tests are valid only forthe
38、exposure conditions described in these test methods.5.5 Various test methods in these test methods require a testspecimen to be exposed to a standard fire that is controlled toachieve specified temperatures throughout a specified timeperiod. The fire-engulfment and vertical fire resistance tests are
39、followed by the application of a standardized hose stream test.These test methods provide a relative measure of the fire-test-response of comparable enclosure materials and grease ductenclosure systems under these exposure conditions. The fireexposure is not representative of all fire conditions bec
40、auseconditions vary with changes in the amount, nature anddistribution of fire loading, ventilation, compartment size andconfiguration, and heat sink characteristics of the compartment.Variation from the test conditions or test specimen construc-tion, such as size, materials, method of assembly, als
41、o affectsthe fire-test-response. For these reasons, evaluation of thevariation is required for application to construction in the field.6. Apparatus6.1 Combustion ChamberA tubular L-shaped assemblyused with a gas-fired burner(s) capable of delivering theminimum interior temperatures and minimum calo
42、rific value(Btu input requirements) for the internal fire test as specified inSection 14.NOTE 3An example of such a device is an L-shaped square steel tubemeasuring 84 6 1 in. by 96 6 1 in. on the exterior legs with an orificemeasuring a minimum 24 by 24 in. and insulated on the interior with aminim
43、um 2 in. thick 8 lb/ft3density ceramic fiber blanket as shown in Fig.1.6.2 Gas-fired BurnerA device that produces heat andflame from a gas undergoing combustion that is capable ofproviding the minimum calorific value (Btu input requirement)to perform the internal fire test.6.3 FurnaceAn enclosed fur
44、nace facility capable of con-trolling a fire to the time-temperature curve in Test MethodsE 119. A vertical furnace with a test frame is shown in Fig. 2and a horizontal furnace is shown in Fig. 3.6.4 Furnace Thermocouples:6.4.1 The E 119 furnace thermocouples shall:6.4.1.1 Be protected by sealed por
45、celain tubes having anominal34-in. (19-mm) outside diameter and18-in. (3-mm)wall thickness, or, as an alternative, in the case of base metalthermocouples, protected by a standard12-in. (13-mm) diam-eter wrought steel or wrought iron pipe of standard weight, and6.4.1.2 Have a time constant between th
46、e range of 5.0 to 7.2min while encased in the tubes described in 6.4.1.1.6.4.2 Other types of E 119 protection tubes or pyrometersshall be used only when they give the same indications undertest conditions as those of 6.4.1.2 within the limit of accuracythat applies for furnace-temperature measureme
47、nts.NOTE 4A typical thermocouple assembly meeting these time constantrequirements is fabricated by fusion-welding the twisted ends of No. 18gage Chromel-Alumel wires, mounting the leads in porcelain insulatorsand inserting the assembly so the thermocouple bead is approximately 0.5in. (25 mm) from th
48、e sealed end of the standard weight nominal12-in.(25-mm) iron, steel, or Inconel5pipe. The time constant for this and forseveral other thermocouple assemblies was measured in 1976. Anotheroption is to calculate the time constant from knowledge of its physical andthermal properties.66.5 Pressure-sens
49、ing ProbesWhere applicable, tolerancesare 65 % of dimensions shown in Fig. 4 or Fig. 5.6.5.1 The pressure-sensing probes shall be either a T-shapedsensor as shown in Fig. 4, or a tube sensor as shown in Fig. 56.6 Unexposed Surface Thermocouples:6.6.1 The unexposed surface thermocouple wires, whichshall be covered by the thermocouple pads described in 6.7during testing, shall not be heavier than No. 18 B and S gage(0.040 in.) (1.02 mm), and shall be electrically insulated withheat-resistant and moisture-resistant coatings.6.7 Thermocouple Pads:6.7.1 The ther
