ASTM D7236 Standard Test Method for Flash Point by Small Scale Closed Cup Tester (Ramp Method)
1. Scope
1.1 This test method covers the determination of the flash point of aviation turbine fuel, diesel fuel, kerosine and related products in the temperature range of 40 °C to 135 °C by a small scale closed cup apparatus.
1.2 This test method is only applicable to homogeneous materials that are liquid at or near ambient temperature and at temperatures required to perform the test.
1.3 This test method is not applicable to liquids contaminated by traces of highly volatile materials.
1.4 This test method is a dynamic method and depends on a definite rate of temperature increase. It is one of many flash point methods available, and every flash point test method, including this one, is an empirical one.
1.5 If the user's specification requires a defined flash point method, neither this test 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.
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. For specific hazard statements, see Section 7 and the Material Safety Data Sheet for the product being tested.
2. Referenced Documents
2.1 ASTM Standards:
D3828 Test Methods for Flash Point by Small Scale Closed Cup Tester
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 General requirements for the competence of reference material producers
ISO Guide 35 Reference materials - General and statistical principles for certification
3. Terminology
3.1 Definitions:
3.1.1 flash point, n - in flash point test methods, the lowest temperature of the test specimen, adjusted to account for variations in atmospheric pressure from 101.3 kPa, at which application of an ignition source causes the vapors of the test specimen to ignite under the specified conditions of test.
3.2 Definitions ofTerms Specific to This Standard:
3.2.1 dynamic, adj - the condition where the vapor above the test specimen, and the test cup, are not in temperature equilibrium at the time the test flame is applied.
3.2.2 ramp method, n - in flash point methods, method that has a test temperature increase at a set rate.
