ASTM D7094-2012 red 8750 Standard Test Method for Flash Point by Modified Continuously Closed Cup (MCCCFP) Tester《用经改良的连续闭杯 (CCCFP) 试验器测定闪点的标准试验方法》.pdf
《ASTM D7094-2012 red 8750 Standard Test Method for Flash Point by Modified Continuously Closed Cup (MCCCFP) Tester《用经改良的连续闭杯 (CCCFP) 试验器测定闪点的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D7094-2012 red 8750 Standard Test Method for Flash Point by Modified Continuously Closed Cup (MCCCFP) Tester《用经改良的连续闭杯 (CCCFP) 试验器测定闪点的标准试验方法》.pdf(10页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7094 04 (Reapproved 2009)D7094 12Standard Test Method forFlash Point by Modified Continuously Closed Cup(MCCCFP) Tester1This standard is issued under the fixed designation D7094; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、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.1. Scope Scope*1.1 This test method covers the determination of the flash point of fuels, lube oils, solvent
3、s and other liquids by a continuouslyclosed cup tester utilizing a specimen size of 2 mL, cup size of 7 mL, with a heating rate of 2.5C per minute.1.1.1 Apparatus requiring a specimen size of 1 mL, cup size of 4 mL, and a heating rate of 5.5C per minute must be runaccording to Test Method D6450.1.2
4、This flash point test method is a dynamic method and depends on definite rates of temperature increase. It is one of the manyflash point test methods available and every flash point test method, including this one, is an empirical method.NOTE 1Flash point values are not a constant physical chemical
5、property of materials tested. They are a function of the apparatus design, the conditionof the apparatus used, and the operational procedure carried out. Flash point can, therefore, only be defined in terms of a standard test method and nogeneral valid correlation can be guaranteed between results o
6、btained by different test methods or where different test apparatus is specified.1.3 This test method utilizes a closed but unsealed cup with air injected into the test chamber.1.4 This test method is suitable for testing samples with a flash point from 35 to 225C.NOTE 2Flash point determinations be
7、low 35C and above 225C may be performed; however, the precision has not been determined below and abovethese temperatures.1.5 If the users specification requires a defined flash point method other than this method, neither this method nor any othertest method should be substituted for the prescribed
8、 test method without obtaining comparative data and an agreement from thespecifier.1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.Temperatures are in degrees Celsius, pressure in kilo-Pascals.1.6.1 Temperatures are in deg
9、rees Celsius, pressure in kilo-Pascals.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylim
10、itations prior to use. For specific warning statements, see 7.2, 8.5, and 10.1.2.2. Referenced Documents2.1 ASTM Standards:2D93 Test Methods for Flash Point by Pensky-Martens Closed Cup TesterD4057 Practice for Manual Sampling of Petroleum and Petroleum ProductsD4177 Practice for Automatic Sampling
11、of Petroleum and Petroleum ProductsD6450 Test Method for Flash Point by Continuously Closed Cup (CCCFP) TesterD6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purportto Measure the Same Property of a MaterialE300 Practice for Sampling Indu
12、strial Chemicals2.2 ISO Standards:3ISO Guide 34 Quality Systems Guidelines for the Production of Reference MaterialsISO Guide 35 Certification of Reference MaterialsGeneral and Statistical Principles1 This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubrican
13、ts and is the direct responsibility of Subcommittee D02.08 onVolatility.Current edition approved Dec. 1, 2009Dec. 1, 2012. Published February 2010March 2013. Originally approved in 2004. Last previous edition approved in 20042009 asD709404.D709404(2009). DOI: 10.1520/D7094-04R09.10.1520/D7094-12.2 F
14、or referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American National Standards Institute (ANSI), 2
15、5 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all
16、 changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 10
17、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Definitions:3.1.1 flash point, nthe lowest temperature corrected to a pressure of 101.3 kPa at which application of an ignition sourcecauses the vapors of a specimen of the sample to ignite momentaril
18、y under specified conditions of the test.3.1.1.1 DiscussionFor the purpose of this test method, the test specimen is deemed to have flashed when the hot flame of the ignited vapor causesan instantaneous pressure increase of at least 20 kPa inside the closed measuring chamber.3.1.2 dynamic, adjthe co
19、ndition where the vapor above the test specimen and the test specimen are not in temperatureequilibrium at the time at which the ignition source is applied.4. Summary of Test Method4.1 The lid of the test chamber is regulated to a temperature at least 18C below the expected flash point. A 2 6 0.2 mL
20、 testspecimen of a sample is introduced into the sample cup. Both specimen and cup are at a temperature at least 18C below theexpected flash point; cooled if necessary. The cup is then raised and pressed onto the lid of specified dimensions to form thecontinuously closed but unsealed test chamber wi
21、th an overall volume of 7.0 6 0.3 mL.4.2 After closing the test chamber, the temperatures of the test specimen and the regulated lid are allowed to equilibrate to within1C.Then the lid is heated at a prescribed, constant rate. For the flash tests, a high voltage arc of defined energy is discharged i
22、nsidethe test chamber at regular intervals.After each ignition, a variable amount of air (see Table 1) is introduced into the test chamberto provide the necessary oxygen for the next flash test. The pressure inside the continuously closed but unsealed test chamberremains at ambient barometric pressu
23、re except for the short time during the air introduction and at a flash point.4.3 After each arc application, the instantaneous pressure increase above the ambient barometric pressure inside the testchamber is monitored.When the pressure increase exceeds 20 kPa, the temperature at that point is reco
24、rded as the uncorrected flashpoint, which is then corrected to barometric pressure.5. Significance and Use5.1 The flash point temperature is one measure of the tendency of the test specimen to form a flammable mixture with air undercontrolled laboratory conditions. It is only one of a number of prop
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