[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 46CFR119.425]



[Page 363]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)

 

PART 119_MACHINERY INSTALLATION--Table of Contents

 

                Subpart D_Specific Machinery Requirements

 

Sec.  119.425  Engine exhaust cooling.



    (a) Except as otherwise provided in this paragraph, all engine 

exhaust pipes must be water cooled.

    (1) Vertical dry exhaust pipes are permissible if installed in 

compliance with Sec. Sec.  116.405(c) and 116.970 of this chapter.

    (2) Horizontal dry exhaust pipes are permitted only if:

    (i) They do not pass through living or berthing spaces;

    (ii) They terminate above the deepest load waterline;

    (iii) They are so arranged as to prevent entry of cold water from 

rough or boarding seas;

    (iv) They are constructed of corrosion resisting material at the 

hull penetration; and

    (v) They are installed in compliance with Sec. Sec.  116.405(c) and 

116.970 of this chapter.

    (b) The exhaust pipe cooling water system must comply with the 

requirements of this paragraph.

    (1) Water for cooling the exhaust pipe must be obtained from the 

engine cooling water system or a separate engine driven pump.

    (2) Water for cooling an exhaust pipe, other than a vertical 

exhaust, must be injected into the exhaust system as near to the engine 

manifold as practicable. The water must pass through the entire length 

of the exhaust pipe.

    (3) The part of the exhaust system between the point of cooling 

water injection and the engine manifold must be water-jacketed or 

effectively insulated and protected in compliance with Sec. Sec.  

116.400(b) and 116.970 of this chapter.

    (4) Each vertical exhaust pipe must be water-jacketed or suitably 

insulated between the engine manifold and the spark arrester required by 

Sec.  119.430(g) of this part.

    (5) When the exhaust cooling water system is separate from the 

engine cooling water system, a suitable warning device, visual or 

audible, must be installed at the operating station to indicate any 

reduction in normal water flow in the exhaust cooling system.

    (6) A suitable hull strainer must be installed in the circulating 

raw water intake line for the exhaust cooling system.

    (c) Engine exhaust cooling systems built in accordance with the 

requirements of American Boat and Yacht Council (ABCY) P-1, 

``Installation of Exhaust Systems for Propulsion and Auxiliary 

Engines,'' will be considered as meeting the requirements of this 

section.