[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of Octobery 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR34.17-90]

[Page 455-456]
 
                           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. 34.17-90  Installations contracted for prior to January 1, 1962--T/ALL.

    (a) Installations contracted for prior to January 1, 1962, shall 
meet the following requirements:
    (1) Existing arrangements, materials, and facilities previously 
approved shall be considered satisfactory so long as they meet the 
minimum requirements of this paragraph and they are maintained in good 
condition to the satisfaction of the Officer in Charge, Marine 
Inspection. Minor repairs and alterations may be made to the same 
standards as the original installation.
    (2) The details of the systems shall be in general agreement with 
Sec. Sec. 34.17-5 through 34.17-20, insofar as is reasonable and 
practicable. Installations contracted for prior to November 19, 1952, 
need not comply with paragraph (a)(2)

[[Page 456]]

of Sec. 34.17-5 and Sec. 34.17-25. A 6-inch blanket of foam in 3 
minutes for machinery spaces and pumprooms will be considered as meeting 
the requirements of Sec. 34.17-5.
    (3) Where a system is installed to protect a tank, it shall be so 
designed and arranged as to spread a blanket of foam over the entire 
liquid surface of the tank within the range of usual trim. The 
arrangement of piping shall be such as to give a relatively uniform 
distribution over the entire area protected.
    (4) For tanks, the rate of discharge to foam outlets protecting the 
hazard shall be as set forth in Sec. 34.17-5(b), except that the value 
of 1 gallon per minute shall be substituted in both cases for the value 
of 1.6 gallons per minute. The quantity of foam provided shall be 
sufficient to operate the equipment for 5 minutes.
    (5) On installations installed prior to November 19, 1952, a 
semiportable foam generator using a dry-chemical mixture or mechanical 
foam in conjunction with the fire lines may be substituted for the fixed 
system subject to the following conditions:
    (i) There shall be at least one fire pump of suitable capacity 
available which can be operated and controlled from outside the space 
protected.
    (ii) Stop valves shall be installed in the line so that if any 
portion of the fire main is ruptured, the foam generator may still be 
operated. Connections for at least two fire hoses shall be provided 
between the pump and the stop valve.
    (iii) If the foam system is of the portable or semiportable type, 
the apparatus and chemicals shall be stored in a readily accessible 
place protected from the weather.