1、Designation: D 5025 05Standard Specification forLaboratory Burner Used for Small-Scale Burning Tests onPlastic Materials1This standard is issued under the fixed designation D 5025; 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.1. Scope*1.1 This specification covers the physical dimensions andcharacteristics of a laboratory burner to be used as
3、an 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.NOTE 1The burner described in this specification is suitable for use inthe following ASTM standards: Specification C 509, Test Method
4、 D 229,Test Method D 635, Test Method D 876, Test Method D 3014, TestMethod D 3801, Test Method D 4804, Test Method D 4986, and TestMethod D 5048. Safety hazards and known limitations on applicability offire-test-response standards are addressed in the individual test methods.NOTE 2This specificatio
5、n is equivalent to the ignition source speci-fied in IEC 60695-11-3, Annex A and IEC 60695-11-4, Annex A.NOTE 3This specification is equivalent to the P/PF2 ignition sourcespecified in ISO 10093.2. Referenced Documents2.1 ASTM Standards:2C 509 Specification for Elastomeric Cellular PreformedGasket a
6、nd Sealing MaterialD 229 Test Methods for Rigid Sheet and Plate MaterialsUsed for Electrical InsulationD 635 Test Method for Rate of Burning and/or Extent andTime of Burning of Self-Supporting Plastics in a Horizon-tal PositionD 876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Ele
7、ctrical InsulationD 883 Terminology Relating to PlasticsD 1600 Terminology of Abbreviated Terms Relating toPlasticsD 3014 Test Method for Flame Height, Time of Burning,and Loss of Mass of Rigid Thermoset Cellular Plastics ina Vertical PositionD 3801 Test Method for Measuring the Comparative Extin-gu
8、ishing Characteristics of Solid Plastics in a VerticalPositionD 4804 Test Methods for Determining the FlammabilityCharacteristics of Nonrigid Solid PlasticsD 4986 Test Method for Horizontal Burning Characteristicsof Cellular Polymeric MaterialsD 5048 Test Method for Measuring the Comparative Burn-in
9、g Characteristics and Resistance to Burn-Through ofSolid Plastics Using a 125-mm FlameD 5207 Practice for Calibration of 20 and 125-mm TestFlames for Small-Scale Burning Tests on Plastic MaterialsE 176 Terminology of Fire Standards2.2 ISO Standards:3ISO 10093 PlasticsFire TestsStandard Ignition Sour
10、ces2.3 IEC Standards:3IEC TS 60695-11-3 Fire Hazard TestingPart 11-3: TestFlames50W FlamesApparatus and ConfirmationalTest MethodsIEC TS 60695-11-4 Fire Hazard TestingPart 11-4: TestFlames500W FlamesApparatus and ConfirmationalTest Methods3. Terminology3.1 DefinitionsFor terms relating to plastics,
11、the defini-tions are in accordance with Terminology D 883, and theabbreviations are in accordance with Terminology D 1600. Forterms relating to fire, the definitions are in accordance withTerminology E 176.4. Design4.1 The burner shall consist of a barrel that threads onto aone-piece base and gas in
12、let, as shown in Fig. 1. Thecomponents shall be constructed of metal.4.1.1 Burner BarrelThe burner barrel shall consist of amixing tube and threaded air-inlet adapter. The mixing tubeshall be of seamless construction, with an inside diameter of9.5 6 0.3 mm. The length of the barrel from the top of t
13、heair-inlet openings to the top of the mixing tube shall be1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.30 on ThermalProperties.Current edition approved April 1, 2005. Published June 2005. Originallyapproved in 19
14、89. Last previous edition approved in 1999 as D 5025 - 99.2For 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.3Av
15、ailable from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1*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 States.100 6 10 mm. Th
16、e top of the mixing tube shall not beequipped with end attachments, such as stabilizers. The air-inlet 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
17、around the adapter. With the barrel fullyscrewed into the base and the lock nut in place, the air-inletopenings shall be completely closed.NOTE 4The 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 Or
18、ificeThe base of the burner shall beequipped with an orifice of 0.90 6 0.03 mm in diameter and1.60 6 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 sha
19、ll be provided for adjustment of the valve. Theneedle valve shall be machined with a conical point using anangle of 40 with a maximum flat top of 0.4 mm.NOTE 5The needle must align with the orifice in the valve seat. Checkthe alignment by removing the barrel and igniting the fuel gas directly atthe
20、orifice. The flame shall remain vertical. If the flame slants, possiblereasons include, but are not limited to: the orifice is off-center, or theneedle is worn. Periodically check the alignment and replace the needle asnecessary.4.1.4 Gas InletThe base of the burner shall be providedwith a serrated
21、fitting for connection to the gas supply.4.1.5 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. Work
22、manship5.1 The mixing tube 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.FIG. 1 Burner DesignD50250527. Ca
23、libration7.1 Unless otherwise agreed upon, 20 and 125-mm testflames shall be calibrated in accordance with Practice D 5207.8. Keywords8.1 flammability; ignition source; laboratory burner; plas-tics; small-scale burning testsSUMMARY OF CHANGESCommittee D20 has identified the location of selected chan
24、ges to this standard since the last issue,D 5025 - 99, that may impact the use of this standard. (April 1, 2005)(1) Updated IEC and ISO references in Note 2(2) Deleted references to withdrawn Test Methods D 3717 andF 377 in 2.1(3) Updated reference to ISO 10093 in 2.2.(4) Updated reference to IEC 60
25、695-11-3 and IEC 60695-11-4in 2.3.(5) Revised 4.1.1 to clarify burner barrel requirements.(6) Moved permissive reference from 4.1.1 and added as Note4.Committee D20 has identified the location of selected changes to this standard since the last issue,D 5025 - 94, that may impact the use of this stan
26、dard. (April 10, 1999)(1) Note 2Added an IEC equivalency statement.(2) 2.3Added IEC reference standards.(3) 4.1.1Revised to allow for adequate space for the lock nutso that the 20-mm flame test can be performed withoutremoving the lock nut.(4) 4.1.3Added specifications for the conical point of thene
27、edle valve.(5) Note 5Revised to clarify the check test for needlealignment.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
28、 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. Your comments
29、 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 comments have not
30、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 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).D5025053
