33 CFR 145.05 - Classification of fire extinguishers.

§ 145.05 Classification of fire extinguishers.
(a) Portable and semi-portable extinguishers shall be classified by a combination letter and number symbol. The letter indicating the type of fire which the unit could be expected to extinguish, and the number indicating the relative size of the unit.
(b) The types of fire will be designated as follows:
(1) “A” for fires in ordinary combustible materials where the quenching and cooling effects of quantities of water, or solutions containing large percentages of water, are of first importance.
(2) “B” for fires in flammable liquids, greases, etc., where a blanketing effect is essential.
(3) “C” for fires in electrical equipment where the use of a non-conducting extinguishing agent is of first importance.
(c) The number designations for size will start with “I” for the smallest to “V” for the largest. Sizes I and II are considered portable extinguishers. Sizes III, IV and V are considered semi-portable extinguishers which shall be fitted with suitable hose and nozzle or other practicable means so that all portions of the space concerned may be covered. Examples of size graduations for some of the typical portable and semi-portable extinguishers are set forth in Table 145.05(c).
Table 145.05(c)—Portable and Semiportable Extinguishers
Classification Soda-acid and water, gallons Foam, gallons Carbon dioxide, pounds Dry chemical, pounds
Type Size
A II 21/2 21/2
B II 21/2 15 10
C II 15 10
B V 40 100 50
(d) All portable and semi-portable extinguishers shall have permanently attached thereto a durable name plate giving the name of the item, the rated capacity in gallons or pounds, the name and address of the person or firm for whom approved, and the identifying mark of the actual manufacturer.
[CGFR 56-4, 21 FR 903, Feb. 9, 1956, as amended by CGFR 58-28, 23 FR 6880, Sept. 6, 1958]

Title 33 published on 2013-07-01

no entries appear in the Federal Register after this date.

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code
U.S. Code: Title 14 - COAST GUARD
U.S. Code: Title 43 - PUBLIC LANDS

Title 33 published on 2013-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 33 CFR 145 after this date.

  • 2014-04-14; vol. 79 # 71 - Monday, April 14, 2014
    1. 79 FR 20844 - Training of Personnel and Manning on Mobile Offshore Units and Offshore Supply Vessels Engaged in U.S. Outer Continental Shelf Activities
      GPO FDSys XML | Text
      DEPARTMENT OF HOMELAND SECURITY, Coast Guard
      Advance notice of proposed rulemaking.
      Comments and related material must either be submitted to our online docket via http://www.regulations.gov on or before July 14, 2014 or reach the Docket Management Facility by that date.
      33 CFR Parts 140, 141, 142, 143, 144, 145, 146, and 147