FLASH POINT BY SMALL SCALE CLOSED CUP TESTER (RAMP METHOD): 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.
