The term flashpoint indicates the temperature in degrees Fahrenheit at which a liquid gives off a flammable vapor when heated in an open-cup tester. For the purpose of the regulations in this subchapter, flashpoints determined by other testing methods will be equivalent to those determined with an open-cup tester, as follows:
Table 30.10-27—Equivalent Flashpoints
[In degrees Fahrenheit]
| Open-cup tester
| Tag closed-cup tester (A.S.T.M.)
| Pensky-Martens closed tester (A.S.T.M.)
|
|---|
| 80 | 75 | |
| 150 | | 140 |
source: CGFR 65-50, 30 FR 16657, Dec. 30, 1965, unless otherwise noted.
cite as: 46 CFR 30.10-27