ASTM E162-2011 5000 Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source《辐射热能源用材料表面易燃性的标准试验方法》.pdf

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1、Designation: E162 11An American National StandardStandard Test Method forSurface Flammability of Materials Using a Radiant HeatEnergy Source1This standard is issued under the fixed designation E162; the number immediately following the designation indicates the year oforiginal adoption or, in the ca

2、se 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 Department of Defense.1. Scope1.1 This fire

3、-test-response standard describes the measure-ment of surface flammability of materials. It is not intended foruse as a basis of ratings for building code purposes (seeAppendix X1).1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematic

4、alconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard measures and describes the response ofmaterials, products, or assemblies to heat and flame undercontrolled conditions, but does not by itself incorporate allfactors required for fire haz

5、ard or fire risk assessment of thematerials, products, or assemblies under actual fire conditions.1.4 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

6、 practices and determine the applica-bility of regulatory limitations prior to use.1.5 Fire testing of products and materials is inherentlyhazardous, and adequate safeguards for personnel and propertyshall be employed in conducting these tests. This test methodmay involve hazardous materials, operat

7、ions, and equipment.Specific information about hazard is given in Section 7.NOTE 1There is no similar or equivalent ISO standard.2. Referenced Documents2.1 ASTM Standards:2D3675 Test Method for Surface Flammability of FlexibleCellular Materials Using a Radiant Heat Energy SourceE84 Test Method for S

8、urface Burning Characteristics ofBuilding MaterialsE176 Terminology of Fire StandardsE1546 Guide for Development of Fire-Hazard-AssessmentStandards2.2 ISO Standards3ISO 13943 Fire SafetyVocabulary3. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod, refer to the terminology

9、contained in TerminologyE176 and ISO 13943. In case of conflict, the definitions givenin Terminology E176 shall prevail.3.2 Definitions of Terms Specific to This Standard:3.2.1 flashing, nflame fronts of 3 seconds or less induration.3.2.1.1 DiscussionAll flame fronts, however temporary,are to be tak

10、en into account.3.2.2 radiant panel index, Is, nthe radiant panel index isthe product of the flame spread factor, Fs, and the heatevolution factor, Q.4. Summary of Test Method4.1 This test method of measuring surface flammability ofmaterials employs a radiant heat source consisting of a 12 by18-in.

11、(305 by 457-mm) panel, in front of which an inclined 6by 18-in. (152 by 457 mm) specimen of the material is placed.The orientation of the specimen is such that ignition is forcednear its upper edge and the flame front progresses downward.4.2 A factor derived from the rate of progress of the flamefro

12、nt and another derived from the rate of heat liberated by thematerial under test are combined to provide a radiant panelindex.5. Significance and Use5.1 This test method provides a laboratory test procedure formeasuring and comparing the surface flammability of materialswhen exposed to a prescribed

13、level of radiant heat energy. It isintended for use in measurements of the surface flammabilityof materials exposed to fire. The test is conducted using small1This test method is under the jurisdiction of ASTM Committee E05 on FireStandards and is the direct responsibility of Subcommittee E05.22 on

14、SurfaceBurning.Current edition approved May 1, 2011. Published June 2011. Originallyapproved in 1960. Last previous edition approved in 2009 as E162 09. DOI:10.1520/E0162-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For

15、Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http:/www.iso.ch.1Copyright ASTM Internati

16、onal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.specimens that are representative, to the extent possible, of thematerial or assembly being evaluated. (Example: in terms oftheir thickness, layering, and any potential substrate.)5.2 The rate at which flames w

17、ill travel along surfacesdepends upon the physical and thermal properties of thematerial, product or assembly under test, the specimen mount-ing method and orientation, the type and level of fire or heatexposure, the availability of air, and properties of the surround-ing enclosure.45.3 In this proc

18、edure, the specimens are subjected to one ormore specific sets of laboratory fire test conditions. If differenttest conditions are substituted or the end-use conditions arechanged, it is not always possible by or from this test to predictchanges in the fire-test-response characteristics measured.The

19、refore, the results are valid only for the fire test exposureconditions described in this procedure.5.4 If the test results obtained by this test method are to beconsidered as part of an overall assessment of fire hazard in abuilding or structure, then the example criteria, concepts andprocedures in

20、corporated into Guide E1546 shall be taken intoconsideration.6. Apparatus6.1 The apparatus shall be as shown in Fig. 1 and includethe following:6.1.1 Radiant Panel with Air and Gas SupplyThe radiantpanel shall consist of a porous refractory material verticallymounted in a cast iron frame, exposing a

21、 radiating surface of12 by 18 in. (305 by 457 mm) and shall be capable of operatingat temperatures up to 1500F (815C). The panel shall beequipped (see Fig. 1) with a venturi-type aspirator for mixinggas and air at approximately atmospheric pressure; a centrifu-gal blower, or equivalent, to provide 1

22、00 ft3/min (50 L/s) air ata pressure of 2.8 in. of water (700 Pa); an air filter to preventdust from obstructing the panel pores; a pressure regulator anda control and shut-off valve for the gas supply.6.1.2 Specimen HolderThe specimen holder shall con-form in shape and dimension to Fig. 2 and be co

23、nstructed fromheat-resistant chromium steel. Observation marks shall be filedon the surface of the specimen holder to correspond with 3-in.(76-mm) interval lines on the specimen.6.1.3 Framework for Support of the Specimen HolderTheframework shall have two transverse rods of stainless steel,each 0.50

24、 6 0.13 in. (12.7 6 3.3 mm) in diameter, with a stopto center the specimen holder directly in front of the radiantpanel. The support and bracing members shall be constructedfrom metal stock. Since the angle of the specimen and itsposition with respect to the panel are critical, the frameworkdimensio

25、ns specifying these conditions shall be within 0.125in. (3.2 mm) of the values given in Fig. 1.6.1.4 Pilot BurnerThe pilot burner shall be a length ofstainless steel tubing approximately 8 to 9 in. (203 to 229 mm)long with nominally 0.125 in. (3.2 mm) inside diameter bynominally 0.19 in. (4.8 mm) ou

26、tside diameter. As an option, toprolong the service life of the pilot burner, the part of theburner that is exposed to radiant energy can be protected witha porcelain tube nominally 0.20 in. (5.2 mm) inside diameterby nominally 0.28 in. (7.14 mm) outside diameter. The burnershall be mounted horizont

27、ally and at a slight angle to theintersection of the horizontal plane of the burner with the planeof the specimen. The burner shall also be capable of beingmoved out of position when not in use. The pilot shall providea 2 to 3 in. (51 to 76-mm) flame of acetylene gas premixed withair in an aspiratin

28、g type fitting. The position of the burner tipshall be such that the pilot flame shall contact or shall be within0.5 in. (12.7 mm) of contacting the upper central surface of thespecimen.6.1.5 StackThe stack shall be made from nominally 0.040in. (1.0 mm) sheet steel with shape and dimensions as shown

29、in Fig. 1. The position of the stack with respect to the specimenand radiant heat panel shall also comply with the requirementsof Fig. 1.6.1.6 ThermocouplesEight thermocouples of equal resis-tance and connected in parallel shall be mounted in the stackand supported with porcelain insulators as indic

30、ated in Fig. 1and Fig. 3. The thermocouples shall be Chromel-Alumel TypeK, shielded against high heat with insulation resisting up to2190 F (1200 C), and with wire gauges in the range of 0.014 0.020 in. (0.36 0.51 mm; 30AWG-24AWG) diameter. Themean stack thermocouple temperature rise for unit heat i

31、nputrate of the calibration burner shall be determined periodicallyfor the specific test apparatus, using the procedure in A1.2.6.1.7 Data Collection SystemFor collecting test data, useone of the following:6.1.7.1 Automatic Potentiometer RecorderAn automaticpotentiometer recorder in the range from 1

32、00 to 1000 F (38 to538 C) shall be installed to record the temperature variation ofthe stack thermocouples as described in 6.1.6.6.1.7.2 Computer Data Collection SystemThe data acqui-sition system shall have the capability to record the tempera-ture output from the thermopile. The data acquisition s

33、ystemshall have an accuracy of 0.01% of the maximum temperatureto be measured.6.1.7.3 Whichever system is used, it shall be capable ofrecording, or printing, data at least every 5 s for a minimum of1 h. For cases where preliminary tests indicate rapid flamespread, a system shall be used capable of a

34、cquiring data fastenough to ensure adequate results (see 12.5).6.1.8 HoodA hood with exhaust blower placed over thestack is required. The blower should produce a velocity of 100ft/min (0.5 m/s) (30.5 m)/min at the top of the stack with theradiant panel not operating, or approximately 250 ft/min (1.3

35、m/s) with the radiant panel at operating temperature. Thevelocity through the stack is not critical for flame-spreadmeasurements provided a stack thermocouple temperature4Robertson, A. F., “Surface Flammability Measurements by the Radiant PanelMethod,” Symposium on Fire Test Methods, ASTM STP 344, A

36、STM, 1962, pp.3346.Robertson, A. F., Gross, D., and Loftus, J., “A Method for Measuring SurfaceFlammability of Materials Using a Radiant Energy Source,” Proceedings, ASTM,Vol 56, 1956, pp. 14371453.Gross, D. and Loftus, J. J., “Surface Flame Propagation on Cellulosic MaterialsExposed to Thermal Radi

37、ation,” Journal of Research, NBS, Vol 67C, 1963, pp.251258.Magee, R. S. and McAlevy III, R. F., “The Mechanism of Flame Spread,”Journal of Fire and Flammability, Vol 2, 1971, pp. 271297.E162 112calibration is performed (see 6.1.6 and A1.2) for the estab-lished test conditions. The hood surfaces shal

38、l clear the top andsides of the stack by a minimum of 10 in. (254 mm) and 7.5 in.(191 mm) respectively.6.1.9 Radiation PyrometerThe radiation pyrometer forstandardizing the thermal output of the panel shall be suitablefor viewing a circular area 10 in. (254 mm) in diameter at arange of about 4 ft (1

39、.2 m). It shall be calibrated over theoperating black body temperature range in accordance with theprocedure described in Annex A1.6.1.9.1 Monitor and record the millivolt output of theradiation pyrometer with the data collection systems describedin 6.1.7.6.1.10 TimerThe timer shall be calibrated to

40、 read to 0.01min to record the time of events during the test.7. Hazards7.1 Safeguards shall be installed in the panel fuel supplysystem to guard against a gas air fuel explosion in the testchamber. Potential safeguards include, but are not limited to,one or more of the following: a gas feed cut-off

41、 activated whenthe air supply fails; a flame sensor directed at the panel surfacethat stops fuel flow when the panel flame goes out; and a heatdetector mounted in contact with the radiant panel plenum thatis activated when the panel temperature exceeds safe limits.Manual reset is a requirement of an

42、y safeguard system used.7.2 The exhaust system must be so designed and operatedthat the laboratory environment is protected from smoke andgas. The operator shall be instructed on ways to minimizeexposure to combustion products by following sound safetyMetric Equivalentsin. mm in. mm0.040 1.0 6 15212

43、 13 912 24158 16 18 45778 22 1938 492134 4434 by34 19 by 19251112 by 114 38 by 32212 64 12 by 18 305 by 4572.8 71 13 by 19 330 by 4834 102 2by2by18 51 by 51 by 3.2438 111 0.050 by 2014 by 36 1.3 by 514 by 914434 121100 ft3/min = 47.21 L/sFIG. 1 Details of Construction of Test EquipmentE162 113and in

44、dustrial hygiene practices. For example, ensure that theexhaust system is working properly and wear appropriateclothing including gloves, safety glasses, and breathing appa-ratus (when hazardous fumes are expected).7.3 During this test, very high heat fluxes and high tempera-tures are generated that

45、 are capable of igniting some clothingfollowing even brief exposures. Precautions shall be taken toavoid ignitions of this type.8. Test Specimens8.1 The test specimen shall be 6 by 18 in. (152 by 457 mm)by the sheet thickness, where this is less than 1 in. (25.4 mm).Materials supplied at a thickness

46、 greater than 1 in. (25.4 mm)shall be cut to 1 in. (25.4 mm) for testing. At the request of thesponsor, it is possible to test materials greater than 1 in. (25.4mm) thickness by using an oversized specimen holder.8.2 Materials intended to be applied to a substrate shall betested on that substrate.8.

47、3 For comparison tests, or where the intended applicationof a finish material is not specified, the finish material shall beprepared for test in accordance with 8.4-8.6.8.4 Opaque sheet materials up to116-in. (1.6-mm) thickness,and liquid films such as paints, etc. intended for application tocombust

48、ible base materials, shall be applied to14-in. (6.4-mm)thick tempered hardboard using recommended applicationprocedures. The hardboard shall have a mean flame-spreadindex of 130 to 160 based upon a minimum of four testsperformed in accordance with this method.8.5 Liquid films and other materials for

49、 application to anoncombustible base shall be applied to the smooth surface of14-in. (6.4-mm) thick inorganic reinforced cement board, usingMetric Equivalentsin. mm in. mm34 19 614 159125 758 448114 32 1818 460376116 by34 by 21 1.6 by 19 by 533514 133FIG. 2 Specimen HolderE162 114specified spreading rate requirements, or, in the absence ofrequirements, a minimum-coating thickness of 0.030 in. (0.76mm).NOTE 2Wherever inorganic reinforced cement board is specified, thematerial shall be nominal14 in. (6 mm) thick, high den