[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: 46CFR58.10-15]

[Page 259-260]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 58_MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS--Table of Contents
 
         Subpart 58.10_Internal Combustion Engine Installations
 
Sec. 58.10-15  Gas turbine installations.

    (a) Standards. The design, construction, workmanship and tests of 
gas turbines and their associated machinery shall be at least equivalent 
to the standards of the American Bureau of Shipping or other recognized 
classification society.
    (b) Materials. The materials used for gas turbine installations 
shall have properties suitable for the intended service. When materials 
not conforming to standard ASTM specifications are employed, data 
concerning their properties, including high temperature strength data, 
where applicable, shall be furnished.
    (c) Exhausts. (1) Where piping is used for gas turbine exhaust 
lines, Class II is required as a minimum. (See subpart 56.04 of this 
subchapter.) Where the exhaust pressure exceeds 150 pounds per square 
inch, such as in closed cycle systems, Class I shall be used. Where 
ducting other than pipe is employed, the drawings and design data shall 
be submitted to substantiate suitability and safety for the intended 
service.
    (2) Where considered necessary, gas turbines and associated exhaust 
systems shall be suitably insulated or cooled, by means of lagging, 
water spray, or a combination thereof.
    (3) Gas turbine exhausts shall not be interconnected with boiler 
uptakes except for gas turbines used for emergency power and lighting or 
for emergency propulsion. Dampers or other suitable means shall be 
installed to prevent backflow of boiler exhaust gases through the 
turbine. Interconnected exhausts must be specifically approved by the 
Commandant.
    (4) A gas turbine exhaust on a mobile offshore drilling unit must 
not discharge in a classified location. \1\
    (d) Air inlets. Air inlets must be designed as follows:
    (1) Each air inlet must have means to protect the safety of life and 
to prevent the entrance of harmful foreign material, including water, 
into the system.
    (2) A gas turbine air inlet must not be in a classified location. 
\1\
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    \1\ Sections 108.171 to 108.175 of this Chapter define classified 
locations for mobile offshore drilling units.
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    (e) Cooling and ventilation. Means shall be provided for circulating 
air, either natural or forced, through the engine compartment for 
cooling and ventilation.
    (f) Automatic shutdown. (1) The control system shall be designed for 
automatic shutdown of the engine with actuation of audible and visible 
alarms at shutdown. The visible malfunction indicator shall indicate 
what condition caused the shutdown and remain visible until reset. 
Automatic shutdown shall occur under the following conditions:
    (i) Overspeed.
    (ii) Low lubricating oil pressure. Consideration will be given 
providing alarm only (without shutdown) in those cases where suitable 
antifriction bearings are fitted.
    (2) Audible or visible alarms shall also be provided for:

[[Page 260]]

    (i) Excessive gas temperature, measured at the turbine inlet, gas 
generator, interstage turbine or turbine exhaust.
    (ii) Excessive lubricating oil temperature.
    (iii) Excessive speed.
    (iv) Reduced lubricating oil pressure.
    (3) A remote, manually operated shutdown device shall be provided. 
Such device may be totally mechanical or may be electrical with a 
manually actuated switch.
    (g) Drawings and design data. Drawings and design data of the 
following components shall be submitted to substantiate their 
suitability and safety for the service intended:
    (1) Combustion chamber.
    (2) Regenerator or recuperator.
    (3) Casing or piping conveying the gas from the combustion device to 
the gas turbine.
    (h) Fuel systems. Gas turbine fuel systems shall meet the 
requirements of part 56 of this subchapter.
    (i) Fire extinguishing systems. A special local fire extinguishing 
system may be required for gas turbine installations if considered 
necessary by the Commandant. Such a system would be in addition to any 
other required in the compartment in which the gas turbine is located.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 72-59R, 37 
FR 6190, Mar. 25, 1972; CGD 73-251, 43 FR 56801, Dec. 4, 1978; CGD 83-
043, 60 FR 24776, May 10, 1995]