B-I and B-II refer to the relative fire extinguishing capacity of approved USCG fire extinguishers, depending upon the type of extinguishing agent used.
Class B fires involve flammable or combustible liquids such as gasoline, kerosene, grease and oil.
The numerical rating BEFORE the letter B, for class B extinguishers, indicates the approximate number of square feet of fire it can extinguish (i.e., with no significant depth).
The numerical rating (I, II, III) AFTER the letter B indicates Coast Guard classification. For example, a UL 5-B:C, rated for 5 sq ft of liquid fire, would be a USCG B-I extinguisher (with 2 pounds of dry chemical).
To obtain a USCG B-II rating you would need the equivalent of 10 pounds of dry chemical, such as having two UL 3-A, 40-B:C extinguishers, or a 15-pound CO2 extinguisher, or 2 1/2 gallons of AFFF "foam" (UL 3-A:20B).
A 20-pound dry-chemical (120-B:C) would meet USCG B-III requirements.
USCG ratings go as high as V, which is a big extinguisher on wheels.
Yes, if the boat is under coast guard jurisdiction, or some other place that has adopted coast-guard regulations for fire extinguishers, then any REQUIRED fire extinguisher aboard must be coast-guard approved and labelled accordingly.
Must be coast guard approved
If a fire breaks out on your boat put it out with a coast guard mandatory fire extinguisher.
The Coast Guard requires that a class B-1 Coast Guard approved portable fire extinguisher in working condition be aboard every PWC
must be fully charged at all times
Must be coast guard approved
A- c
A- c
Yes. They are rated for the type of fire they can be used against, and the capacity of the extinguisher.
Burning liquids such as gasoline, kerosene, paint, acetone, and so on.
B-I is the minimum US Coast Guard approval rating for extinguishers on powerboats. It corresponds to a UL Class 5-B:C, 2-pound, dry chemical extinguisher that has been properly packaged and mounted for USCG approvals as well. It could also mean a 4-pound CO2 extinguisher or a 7-quart foam extinguisher. What can you do with it? Well, a B-1 rated extinguisher is just the thing for putting out "flammable liquid" fires on boats, a B-1 or B-2 rated extinguisher being required by the Coast Guard to operate the vessel. If the gasoline or diesel fuel spills and catches fire, your extinguisher will probably be adequate to put it out, provided that you act promptly. The UL 5-B rating implies that a novice firefighter can extinguish 5 square feet of flaming liquid fuel using that extinguisher. The C rating means it is also approved for use on energized electrical fires, i.e., it is non-conductive.
Type of fire it will extinguish, and the capacity of the exinguisher