[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: 46CFR34.25-5]

[Page 466-467]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 34_FIREFIGHTING EQUIPMENT--Table of Contents
 
        Subpart 34.25_Water Spray Extinguishing Systems, Details
 
Sec. 34.25-5  Capacity and arrangement--T/ALL.

    (a) The capacity and arrangement shall be such as to effectively 
blanket the entire area of the space protected. The rate of discharge 
and the arrangement of piping and spray nozzles shall be such as to give 
a uniform distribution over the entire area protected.
    (b) The spacing of the spray nozzles shall be on the basis of the 
spray pattern provided by the lowest pressure at any spray nozzle in the 
system. In no instance shall a system be designed for any spray nozzle 
to be operated at a pressure less than that for which it was approved. 
The maximum permissible height of the spray nozzle above the protected 
area shall not exceed that specified in its approval. Whenever there are 
obstructions to coverage by the spray patterns, additional spray nozzles 
shall be installed to provide full coverage.
    (c) The water supply shall be from outside the space protected and 
shall in no way be dependent upon power from the space protected. The 
pump supplying water for the system shall either be reserved exclusively 
for the system or it may be one of the fire pumps, provided the capacity 
of the fire pump as set forth in subpart 34.10

[[Page 467]]

is increased by the required capacity of the system, so that this system 
may be operated simultaneously with the fire main system.