[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR34.17-5]

[Page 462-463]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 34_FIREFIGHTING EQUIPMENT--Table of Contents
 
         Subpart 34.17_Fixed Foam Extinguishing Systems, Details
 
Sec. 34.17-5  Quantity of foam required--T/ALL.

    (a) Area protected. (1) For machinery spaces and pumprooms, the 
system shall be so designed and arranged as to spread a blanket of foam 
over the entire tank top or bilge of the space protected. The 
arrangement of piping shall be such as to give a relatively uniform 
distribution over the entire area protected.
    (2) Where an installation is made to protect an oil-fired boiler 
installation on a flat which is open to or can drain to the lower 
engineroom or other space, both the flat and the lower space shall be 
protected simultaneously. The flat shall be fitted with suitable 
coamings on all openings other than deck drains to properly restrain the 
oil and foam at that level. Other installations of a similar nature will 
be considered in a like manner.
    (b) Rate of application. (1) The rate of discharge to foam outlets 
protecting the hazard shall be at least as set forth in this paragraph.
    (2) For chemical foam systems with stored ``A'' and ``B'' solutions, 
a total of at least 1.6 gallons per minute of the two solutions shall be 
discharged for each 10 square feet of area protected.

[[Page 463]]

    (3) For other types of foam systems, the water rate to the dry-
powder generators or air foam production equipment shall be at least 1.6 
gallons per minute for each 10 square feet of area protected.
    (c) Supply of foam-producing material. (1) There shall be provided a 
quantity of foam-producing material sufficient to operate the equipment 
at the minimum discharge rate specified in paragraph (b) of this section 
for a period of at least 3 minutes.
    (d) Separate supply of foam-producing material. (1) A separate 
supply of foam-producing material need not be provided for each space 
protected. This includes a deck foam system. The total available supply 
shall be at least sufficient for the space requiring the greatest 
amount.
    (e) Water supply for required pumps. (1) The water supply shall be 
from outside and completely independent of the space protected.