[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of Octobery 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR38.15-10]

[Page 497]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 38_LIQUEFIED FLAMMABLE GASES--Table of Contents
 
                   Subpart 38.15_Special Requirements
 
Sec. 38.15-10  Leak detection systems--T/ALL.

    (a) A detection system shall be permanently installed to sense cargo 
leaks. The detectors shall be located within the space so as to permit 
the sensing of an initial leak and prevent an undetected gas 
accumulation. The sensitivity shall be in accordance with paragraph (b) 
of this section. The detectors shall be fitted in the following 
compartments:
    (1) Between the primary and secondary barriers for nonpressure 
vessel type tanks.
    (2) Cargo handling rooms and spaces containing cargo piping or cargo 
handling systems.
    (3) All enclosed spaces, except tanks and cofferdams, which are 
separated from the cargo tanks by only the secondary barrier.
    (4) Other spaces where gas concentrations might be expected.
    (5) Cargo holds, containing pressure vessel type tanks and no cargo 
piping, are exempt from the requirements of this paragraph.
    (b) The indicating instruments for the detection system shall be 
located on the bridge or at the cargo control station. An audio and 
visual warning shall be given before any gas concentration reaches 30 
percent of the lower explosive limit. The alarm shall indicate both on 
the bridge and at the cargo control station. Sampling of each detector 
shall be at least once every half hour.
    (c) Means shall be provided to measure the full range of cargo gas 
concentration in the spaces.

[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-65, 33 FR 
19985, Dec. 28, 1968]