Cleveland Open Cup

Pensky-Martens closed cup unless otherwise noted. Cleveland open cup. 

As of late 1996, ASTM subcommittee D08.03 is considering changing the flash point from 246°C to 260°C. COC = Cleveland open cup. 

Trinidad asphalt has a relatively uniform composition of 29% water and gas, 39% bitumen soluble in carbon disulfide, 27% mineral matter on ignition, and 5% bitumen that remains adsorbed on the mineral matter. Refining is essentially a process of dehydration by heating the cmde asphalt to ca 165°C. The refined product averages 36% mineral ash with a penetration at 25°C of about 2 (0.2 mm), a softening point (ring and ball method) of 99°C, a flash point (Cleveland open cup) of 254°C, a sulfur content of 3.3%, and a saponification value of 45 mg KOH/g. The mineral matter typically contains... 

Flash Point (ASTMD92). The Cleveland open cup method is most commonly used although the Tag open cup (ASTM D3143) is apphcable to cutbacks. Flash point is an indication of fire hazard and the test is frequendy used to indicate whether a given product has been contaminated with materials of lower dash point. 

Monsanto Product bulletin IC/FP-215A, 1990. Cleveland Open Cup. 

Benzotricbloride [(tricblorometbyl)benzene, a,a,a-trichlorotoluene, phenylchloroform], C H CCl, is a colorless, oily Hquid with a pungent odor. It is soluble in most organic solvents, but it reacts with water and alcohol. For ben zotricbl oride the flash point is 127°C (Cleveland open cup) and the autoignition temperature is 211°C (8). 

Flash Point - The flash point of a material is the lowest temperature at which vapors above a volatile substance will ignite in air when exposed to a flame. Depending on the test method used, the value of flash point temperature is either Tag Closed Cup (CC) based on ASTM D56 test method, or Cleveland Open Cup (CC) based on ASTM 093. The value provides a relative indication of the flammability of the chemical. 

The flash pt for IPN using the Abel closed cup method is 53°F while the Cleveland open cup method gives a value of 72°F. Min spont ign temp range in air on a heated brass, Al stainless steel or mild steel plate is 245—60° The following data from Ref 6 present, in tabular form, the limits of flammability of IPN vapor/air mixts over a press and temp range ... 

There is hardly any experimental data needed to assess the effect of differences in the apparatus. There are only isolated values for flashpoint PMoc (Pensky-Martens open cup), only two pairs of values for Tcc and PMcc and only three pairs of values for Toe and Coc (Coc Cleveland open cup). 

Figure 6-3 Cleveland open-cup flash point determination. The test flame applicator is moved back and forth horizontally over the liquid sample.

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