CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER D—TANK VESSELS (parts 30 to 39) > PART 30—GENERAL PROVISIONS > SUBPART 30.10—Definitions (§30.10-1 to §30.10-71) > 30.10-22—Flammable liquid—TB/ALL.

30.10-22—Flammable liquid—TB/ALL.

The term flammable liquid means any liquid which gives off flammable vapors (as determined by flashpoint from an open-cup tester, as used for test of burning oils) at or below a temperature of 80 °F. Flammable liquids are referred to by grades as follows:
(a) Grade A. Any flammable liquid having a Reid 1 vapor pressure of 14 pounds or more.

Code of Federal Regulations

Footnote(s): 1 American Society for Testing Materials Standard D 323 (incorporated by reference, see § 30.01-3 ), Method of Test for Vapor Pressure of Petroleum Products (Reid Method).
(b) Grade B. Any flammable liquid having a Reid 1 vapor pressure under 14 pounds and over 8 1/2 pounds.
(c) Grade C. Any flammable liquid having a Reid 1 vapor pressure of 8 1/2 pounds or less and a flashpoint of 80 °F. or below.

Code of Federal Regulations

[CGFR 65-50, 30 FR 16657, Dec. 30, 1965, as amended by CGD 73-96, 42 FR 49023, Sept. 26, 1977; USCG-2000-7790, 65 FR 58458, Sept. 29, 2000]