1、Designation: D5025 11Standard Specification forLaboratory Burner Used for Small-Scale Burning Tests onPlastic Materials1This standard is issued under the fixed designation D5025; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、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. Scope*1.1 This specification covers the physical dimensions andcharacteristics of a laboratory burner to be used as an
3、ignitionsource for small-scale burning tests on plastic materials. Theburner is used with methane, propane, or butane supply gasesfor flame heights of 20 to 125 mm.1.2 Fire testing of products and materials is inherentlyhazardous, and adequate safeguards for personnel and prop-erty shall be employed
4、 in conducting these tests.1.3 The burner described in this specification is suitable foruse in the followingASTM standards: Specification C509, TestMethod D229, Test Method D635, Test Method D876, TestMethod D3014, Test Method D3801, Test Method D4804, TestMethod D4986, and Test Method D5048. Safet
5、y hazards andknown limitations on applicability of fire-test-response stan-dards are addressed in the individual test methods.NOTE 1This specification is equivalent to the ignition source speci-fied in IEC 60695-11-3, Annex A and IEC 60695-11-4, Annex A.NOTE 2This specification is equivalent to the
6、P/PF2 ignition sourcespecified in ISO 10093.2. Referenced Documents2.1 ASTM Standards:2C509 Specification for Elastomeric Cellular PreformedGasket and Sealing MaterialD229 Test Methods for Rigid Sheet and Plate MaterialsUsed for Electrical InsulationD635 Test Method for Rate of Burning and/or Extent
7、 andTime of Burning of Plastics in a Horizontal PositionD876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical InsulationD883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating toPlasticsD3014 Test Method for Flame Height, Time of Burning,and Lo
8、ss of Mass of Rigid Thermoset Cellular Plastics ina Vertical PositionD3801 Test Method for Measuring the Comparative Burn-ing Characteristics of Solid Plastics in a Vertical PositionD4804 Test Method for Determining the FlammabilityCharacteristics of Nonrigid Solid PlasticsD4986 Test Method for Hori
9、zontal Burning Characteristicsof Cellular Polymeric MaterialsD5048 Test Method for Measuring the Comparative Burn-ing Characteristics and Resistance to Burn-Through ofSolid Plastics Using a 125-mm FlameD5207 Practice for Confirmation of 20mm (50W) and125mm (500W) Test Flames for Small-Scale BurningT
10、ests on Plastic MaterialsE176 Terminology of Fire Standards2.2 ISO Standards:3ISO 10093 PlasticsFire TestsStandard Ignition Sources2.3 IEC Standards:3IEC TS 60695-11-3 Fire Hazard TestingPart 11-3: TestFlames50W FlamesApparatus and ConfirmationalTest MethodsIEC TS 60695-11-4 Fire Hazard TestingPart
11、11-4: TestFlames500W FlamesApparatus and ConfirmationalTest Methods3. Terminology3.1 DefinitionsFor terms relating to plastics, the defini-tions are in accordance with Terminology D883, and theabbreviations are in accordance with Terminology D1600. Forterms relating to fire, the definitions are in a
12、ccordance withTerminology E176.4. Design4.1 The burner shall consist of a barrel that threads onto aone-piece base and gas inlet, as shown in Fig. 1. Thecomponents shall be constructed of metal, typically of brass oraluminum.4.1.1 Burner BarrelThe burner barrel shall consist of amixing tube and thre
13、aded air-inlet adapter. The mixing tube1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.30 on ThermalProperties.Current edition approved Dec. 1, 2011. Published January 2012. Originallyapproved in 1989. Last previous
14、edition approved in 2005 as D5025 - 05. DOI:10.1520/D5025-11.2For 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.
15、3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United
16、 States.shall be of seamless construction, with an inside diameter of9.5 6 0.3 mm. The length of the barrel from the top of theair-inlet openings to the top of the mixing tube shall be100 6 10 mm. The top of the mixing tube shall not beequipped with end attachments, such as stabilizers. The air-inle
17、t adapter, located at the bottom of the mixing tube, shall beapproximately 25 mm high and 20 mm in overall diameter. Theminimum area of the air-inlet openings shall be 225 mm2distributed equidistant around the adapter. With the barrel fullyscrewed into the base and the lock nut in place, the air-inl
18、etopenings shall be completely closed.NOTE 3The requirement for the minimum area of the air-inletopenings has commonly been obtained with three openings, approxi-mately 6.5 by 12.5 mm.4.1.2 Burner OrificeThe base of the burner shall beequipped with an orifice of 0.90 6 0.03 mm in diameter and1.60 6
19、0.05 mm in length.4.1.3 Needle ValveThe base of the burner shall beequipped with a machined needle valve to restrict the orificeopening and regulate gas velocity through the burner. Aknurled knob shall be provided for adjustment of the valve.Theneedle valve shall be machined with a conical point usi
20、ng anangle of 40 with a maximum flat top of 0.4 mm.4.1.3.1 The needle must align with the orifice in the valveseat. Alignment can be confirmed by removing the barrel andigniting the fuel gas directly at the orifice. The flame shallremain vertical.NOTE 4If the flame slants, possible reasons include,
21、but are notlimited to: the orifice is off-center, or the needle is worn. Periodicallyconfirm the alignment and take appropriate actions to ensure the flameremains vertical.4.1.4 Gas InletThe base of the burner shall be providedwith a serrated fitting for connection to the gas supply.4.1.5 Lock Nut (
22、Optional)Provide the burner with a locknut that threads onto the base. This allows the barrel to betightened securely against the lock nut when test flames requirepositioning of the barrel with air-inlet openings partially orfully open.FIG. 1 Burner DesignD5025 1125. Workmanship5.1 The mixing tube o
23、f the barrel shall have a uniform bore.The barrel, threads, and serrated fitting shall be free of flashand burrs.6. Markings6.1 The base of the burner shall be marked with the name,brand, or trademark of the manufacturer; and model number.7. Calibration7.1 Unless otherwise agreed upon, 20 and 125-mm
24、 testflames shall be calibrated in accordance with Practice D5207.8. Keywords8.1 flammability; ignition source; laboratory burner; plas-tics; small-scale burning testsSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue, D5025 - 05,tha
25、t may impact the use of this standard. (December 1, 2011)(1) The information in old Note 1 has been incorporated intothe scope since the note included information about relatedstandards.(2) Added subsection 1.2 to include hazard warning as part ofthe template format.(3) Subsection 4.1 harmonizes thi
26、s specifications text withISO 10093 to include examples of metals that can be used tofabricate the burner.(4) Old Note 5 was revised to separate language that isconsidered mandatory from the note and incorporate that intothe body of the standard (see 4.1.3.1). Note 4 has only languagethat is not con
27、sidered mandatory.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement o
28、f such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for
29、additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known t
30、o the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D5025 113
