1、Designation: D5025 12Standard 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 specifiedin IEC 60695-11-3, Annex A and IEC 60695-11-4, Annex A.NOTE 2This specification is equivalent to the P/
6、PF2 ignition sourcespecified in ISO 10093.2. Referenced Documents2.1 ASTM Standards:2C509 Specification for Elastomeric Cellular Preformed Gas-ket 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 forAbbreviated Terms Relating to Plas-ticsD3014 Test Method for Flame Height, Time of Burning, andL
8、oss of Mass of Rigid Thermoset Cellular Plastics in aVertical PositionD3801 Test Method for Measuring the Comparative BurningCharacteristics of Solid Plastics in a Vertical PositionD4804 Test Method for Determining the Flammability Char-acteristics of Nonrigid Solid PlasticsD4986 Test Method for Hor
9、izontal Burning Characteristicsof Cellular Polymeric MaterialsD5048 Test Method for Measuring the Comparative BurningCharacteristics and Resistance to Burn-Through of SolidPlastics Using a 125-mm FlameD5207 Practice for Confirmation of 20mm (50W) and125mm (500W) Test Flames for Small-Scale BurningTe
10、sts 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 1
11、1-4: 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 ac
12、cordance 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.1This specification is under the jurisdiction of ASTM Committee D20 onPlasti
13、cs and is the direct responsibility of Subcommittee D20.30 on ThermalProperties.Current edition approved Aug. 1, 2012. Published September 2012. Originallyapproved in 1989. Last previous edition approved in 2011 as D5025 - 05. DOI:10.1520/D5025-12.2For referenced ASTM standards, visit the ASTM websi
14、te, 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.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:
15、/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.1 Burner BarrelThe burner barrel shall consist of amixing tube and threaded air-inlet adapter. The mixi
16、ng tubeshall 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-inlet
17、 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-inle
18、topenings 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 0
19、.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. Periodically confirm the alignment and takeappropria
21、te actions to ensure the flame remains vertical.NOTE 4If the flame slants, possible reasons include, but are notlimited to: the orifice is off-center, or the needle is worn.4.1.4 Gas InletThe base of the burner shall be providedwith a serrated fitting for connection to the gas supply.FIG. 1 Burner D
22、esignD5025 1224.1.5 Lock Nut (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.5. Workmanship5.1 The mixing tube
23、of 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-m
24、m 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 - 11,th
25、at may impact the use of this standard. (August 1, 2012)(1) Revised 4.1.3.1 and Note 4.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
26、the validity of any such patent rights, and the riskof infringement of 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. Y
27、our comments are invited either for revision of this standard or for 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 commen
28、ts have not received a fair hearing you shouldmake your views known to 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 mu
29、ltiple 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 123
