ASTM D2863-2012 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)《测量支持塑料蜡烛式燃烧的最低需氧浓度的标准试验方法》.pdf
《ASTM D2863-2012 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)《测量支持塑料蜡烛式燃烧的最低需氧浓度的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2863-2012 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)《测量支持塑料蜡烛式燃烧的最低需氧浓度的标准试验方法》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D2863 12Standard Test Method forMeasuring the Minimum Oxygen Concentration to SupportCandle-Like Combustion of Plastics (Oxygen Index)1This standard is issued under the fixed designation D2863; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n the case 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. Scope*1.1
3、This fire-test-response standard describes a procedurefor measuring the minimum concentration of oxygen, ex-pressed as percent volume, that will just support flamingcombustion in a flowing mixture of oxygen and nitrogen.1.2 This test method provides three testing procedures.Procedure A involves top
4、surface ignition, Procedure B in-volves propagating ignition, and Procedure C is a shortprocedure involving the comparison with a specified minimumvalue of the oxygen index.1.3 Test specimens used for this test method are preparedinto one of six types of specimens (see Table 1).1.4 This test method
5、provides for testing materials that arestructurally self-supporting in the form of vertical bars or sheetup to 10.5-mm thick. Such materials are solid, laminated orcellular materials characterized by an apparent density greaterthan 15 kg/m3.1.5 This test method also provides for testing flexible she
6、etor film materials, while supported vertically.1.6 This test method is also suitable, in some cases, forcellular materials having an apparent density of less than 15kg/m3.NOTE 1Although this test method has been found applicable fortesting some other materials, the precision of the test method has
7、not beendetermined for these materials, or for specimen geometries and testconditions outside those recommended herein.1.7 This test method measures and describes the response ofmaterials, products, or assemblies to heat and flame undercontrolled conditions, but does not by itself incorporate allfac
8、tors required for fire hazard or fire risk assessment of thematerials, products, or assemblies under actual fire conditions.1.8 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.9 This standard does not purport to address all of
9、 thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific hazardsstatement are given in Section 10.1.10 Fire testin
10、g is inherently hazardous. Adequate safe-guards for personnel and property shall be employed inconducting these tests.NOTE 2This test method and ISO 4589-2 are technically equivalentwhen using the gas measurement and control device described in 6.3.1,with direct oxygen concentration measurement.2. R
11、eferenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1071 Test Methods for Volumetric Measurement of Gas-eous Fuel SamplesD1622 Test Method for Apparent Density of Rigid CellularPlasticsD4802 Specification for Poly(Methyl Methacrylate)AcrylicPlastic SheetE176 Te
12、rminology of Fire StandardsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standards:3ISO 4589-2 PlasticsDetermination of Flammability byOxygen IndexPart 2, Ambient TemperaturesISO 7823-1 Poly(Methylmethacrylate) SheetsTypes, Di-mensions and Ch
13、aracteristicsPart 1Cast SheetsISO 13943 Fire SafetyVocabulary3. Terminology3.1 Definitions3.1.1 For definitions of terms used in this test method referto the terminology contained in Terminology E176 andISO 13943. In case of conflict, the definitions given in Termi-nology E176 shall prevail.1This te
14、st method is under the jurisdiction ofASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.30 on Thermal Properties.Current edition approved April 1, 2012. Published May 2012. Originallyapproved in 1970. Last previous edition approved in 2010 as D2863 - 10. DOI:10.1520/
15、D2863-12.2For 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.3Available from American National Standards Institut
16、e (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 States.3.2 Definitions of Terms Specific to This St
17、andard:3.2.1 ignitionthe initiation of combustion.3.2.2 oxygen index (OI)the minimum concentration ofoxygen determined by the method in 12.1, expressed as volumepercent, in a mixture of oxygen and nitrogen that will justsupport flaming combustion of a material initially at 23 6 2Cunder the condition
18、s of this test method.3.3 Symbols Specific To This Test Method:3.3.1 Cooxygen concentration in percent volume.3.3.2 CFfinal value of oxygen concentration in percentvolume.3.3.3 Cieach of the oxygen concentration percentagesused during measurement of the last six responses in the NTseries.3.3.4 Oneit
19、her the period or extent of burning exceeds therelevant limit specified in Table 2.3.3.5 Xthe period or extent of burning exceeds the rel-evant limit specified in Table 2.3.3.6 NLseries of “X” or “O” results.3.3.7 NTseries of “X” or “O” results plus five (NT=NL+ 5).3.3.8 s*standard deviation of the
20、oxygen concentration.3.3.9 dinterval between oxygen concentration levels inpercent volume.3.3.10 ka factor to be determined from Table 3.3.3.11 nnumber of measurements of oxygen concentra-tion.4. Summary of Test Method4.1 A small test specimen is supported vertically in amixture of oxygen and nitrog
21、en flowing upwards through atransparent chimney. The upper end of the specimen is ignitedand the subsequent burning behavior of the specimen isobserved to compare the period for which burning continues,or the length of specimen burnt, with specified limits for eachburning. By testing a series of spe
22、cimens in different oxygenconcentrations, the minimum oxygen concentration is deter-mined.4.2 Three procedures are included in this test method. InProcedure A, a complete assessment of the oxygen index isconducted using top surface ignition. In Procedure B, acomplete assessment of the oxygen index i
23、s conducted usingpropagating ignition. Procedure C provides a comparison witha specified minimum value of oxygen index and can beconducted using top surface ignition or propagating ignition.5. Significance and Use5.1 This test method provides for the measuring of theminimum concentration of oxygen i
24、n a flowing mixture ofoxygen and nitrogen that will just support flaming combustionof plastics. Correlation with burning characteristics underactual use conditions is not implied.5.2 In this test method, the specimens are subjected to oneor more specific sets of laboratory test conditions. If differ
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD28632012STANDARDTESTMETHODFORMEASURINGTHEMINIMUMOXYGENCONCENTRATIONTOSUPPORTCANDLELIKECOMBUSTIONOFPLASTICSOXYGENINDEX

链接地址:http://www.mydoc123.com/p-513669.html