FLASH POINT BY SMALL SCALE CLOSED CUP TESTER (RAMP METHOD): ASTM D7236
EXPLANATION
This test method covers the determination of the flash point of aviation turbine fuel, diesel fuel, kerosene, and related products in the temperature range of 40 to 135° C by a small scale closed cup apparatus. This test method is not applicable to liquids contaminated by traces of highly volatile materials. This test method is a dynamic method and depends on a definite rate of temperature increase. If the product specification requires a specific flash point method, neither this or any other method should be substituted without agreement between the buyer and the seller of the product.
TEST SUMMARY
A 2 +/- 0.1 mL test specimen is introduced into the test cup that is then heated automatically at a constant rate of 2 +/- 0.5° C/min. A gas test flame is directed through an opening shutter, in the test cup lid, at specified temperature intervals until a flash is detected by the automatic flash detector.
TEST PRECISION
Repeatability: 0.01285 (x + 40)
Reproducibility: 0.02482 (x + 40)
Where x is the average of results being compared in the flash point range of 40 to 135° C.
Since there is no accepted reference material for this test method, bias of the method cannot be determined.
