[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR56.50-45]

[Page 198]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 56_PIPING SYSTEMS AND APPURTENANCES--Table of Contents
 
    Subpart 56.50_Design Requirements Pertaining to Specific Systems
 
Sec. 56.50-45  Circulating pumps.

    (a) A main circulating pump and emergency means for circulating 
water through the main condenser shall be provided. The emergency means 
may consist of a connection from an independent power pump fitted 
between the main circulating pump and the condenser.
    (b) Independent sea suctions shall be provided for the main 
circulating and the emergency circulating pumps.
    (c) A cross connection between the circulating pumps in the case of 
multiple units will be acceptable in lieu of an independent power pump 
connection.
    (d) On vessels operating on lakes (including Great Lakes), bays, 
sounds, or rivers, where provision is made to operate noncondensing, 
only one circulating unit will be required.