[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: 46CFR52.01-130]

[Page 132]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 52_POWER BOILERS--Table of Contents
 
                   Subpart 52.01_General Requirements
 
Sec. 52.01-130  Installation.

    (a) Foundations. (1) Plans showing details of proposed foundations 
and support for boilers and the proposed means of bracing boilers in the 
vessel shall be submitted for approval to the Officer in Charge, Marine 
Inspection, in the district where the installation is being made.
    (2) Provision shall be made in foundations for expansion of the 
boilers when heated.
    (3) Boilers shall be provided with chocks to prevent movement in the 
event of collision unless a bolted or riveted construction 
satisfactorily provides for this contingency.
    (b) Protection of adjacent structure. (1) Boilers shall be so placed 
that all parts are readily accessible for inspection and repair.
    (2) In vessels having a double bottom or other extensive surfaces 
directly below the boiler, the distance between such surface and a 
boiler shall in no case be less than 18 inches at the lowest part.
    (3) In certain types of vessels where the boiler foundation forms 
the ashpit, such foundations shall be efficiently ventilated, except in 
cases where the ashpit is partially filled with water at all times.
    (4) The pans of oil-burning, watertube boilers shall be arranged to 
prevent oil from leaking into the bilges and shall be lined with 
firebrick or other heat resisting material.
    (5) The distance between a boiler and a compartment containing fuel 
oil shall not be less than 24 inches at the back end of a boiler and 18 
inches elsewhere, except that for a cylindrical part of a boiler or a 
knuckle in the casing of a water-tube boiler, these distances may be 
reduced to 18 inches, provided all parts are readily accessible for 
inspection and repair.
    (6) All oil-burning boilers shall be provided with oiltight drip 
pans under the burners and elsewhere as necessary to prevent oil 
draining into the bilges.
    (c) Boiler uptakes. (1) Where dampers are installed in the uptakes 
or funnels, the arrangement shall be such that it will not be possible 
to shut off the gas passages from the operating boilers.
    (2) Each main power boiler and auxiliary boiler shall be fitted with 
a separate gas passage.