ASTM D6450 method for flash point by continuously closed cup (CCCFP) tester
1. Scope
1.1 This flash point test method is a dynamic method and depends on definite rates of temperature increase. It is one of the many flash point test methods available, and every flash point test method, including this one, is an empirical method.
NOTE 1 - Flash point values are not a constant physical-chemical property of materials tested. They are a function of the apparatus design, the condition of the apparatus used, and the operational procedure carried out. Flash point can therefore only be defined in terms of a standard test method, and no general valid correlation can be guaranteed between results obtained by different test methods or with test apparatus different from that specified.
1.2 This test method covers the determination of the flash point of fuel oils, lube oils, solvents, and other liquids by a continuously closed cup tester. The measurement is made on a test specimen of 1 mL.
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 10 to 250°C.
NOTE 2 - Flash point determinations below 10°C and above 250°C can be performed; however, the precision has not been determined below and above these temperatures.
1.5 If the user's specification requires a defined flash point method other than this test method, neither this test method nor any other method should be substituted for the prescribed method without obtaining comparative data and an agreement from the specifier.
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, and pressure is 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 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific warning statements appear throughout the standard.
2. Referenced Documents
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
E300 Practice for Sampling Industrial Chemicals
2.2 ISO Standards:
ISO Guide 34 Quality Systems Guidelines for the Production of Reference Materials
ISO Guide 35 Certifications of Reference Material - General and Statistical Principles
3. Terminology
3.1 Definitions:
3.1.1 dynamic, adj - the condition in which the vapor above the test specimen and the test specimen are not in temperature equilibrium at the time at which the ignition source is applied.
3.1.2 flash point, n - the lowest temperature corrected to a pressure of 101.3 kPa at which application of an ignition source causes the vapors of a specimen of the sample to ignite momentarily under specified conditions of the test.
3.1.2.1 Discussion - For the purpose of this test method, the test specimen is deemed to have flashed when the hot flame of the ignited vapor causes an instantaneous pressure increase of at least 20 kPa inside the closed measuring chamber.
