[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR38.05-1]

[Page 495]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 38_LIQUEFIED FLAMMABLE GASES--Table of Contents
 
                  Subpart 38.05_Design and Installation
 
Sec. 38.05-1  Design and construction of vessels--general--TB/ALL.


    (a) Vessels designed for the carriage of liquefied gases shall 
comply with the applicable requirements of this subchapter.
    (b) Access and ventilation intakes to the machinery, accommodation 
and working spaces should be so arranged as to prevent the flow of cargo 
vapor from the weather deck into such spaces. In this respect openings 
in the forward or after ends of poops, forecastles, and deckhouses 
adjacent the cargo area shall be at least 24 inches above the cargo 
handling deck.
    (c) Materials used in the fabrication of cargo tanks and piping 
shall have adequate notch toughness at the service temperature. Where a 
secondary barrier is required, the material of that barrier and of 
contiguous hull structure shall have sufficient notch toughness at the 
lowest temperature which may result during the containment of leakage 
cargo within the secondary barrier. Materials used in the fabrication of 
the cargo containment and handling system shall satisfy the requirements 
for toughness specified in subchapter F (Marine Engineering) of this 
chapter.
    (d) Cargo tank spaces are to be isolated from the remainder of the 
vessel by cofferdams in accordance with Sec. 32.60-10 of this 
subchapter. In a nonpressure vessel configuration, the void between the 
primary and secondary barriers shall not be acceptable as the required 
cofferdam between the tank spaces and the main machinery spaces.
    (e) Compartments containing cargo tanks or pipes shall be accessible 
from the weather deck only. No openings from these compartments to other 
parts of the vessel are permitted.
    (f) Barges utilized for the carriage of liquefied gases shall be of 
Type II barge hull as defined in Sec. 32.63-5(b)(2) of this subchapter. 
The Commandant may, based on the properties of the liquefied gas to be 
carried, require a Type I barge hull, as defined in Sec. 32.63-5(b)(1) 
of this subchapter, to ensure the hull is consistent with the degree and 
nature of the hazard of the liquefied gas to be carried.

[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 
18806, Dec. 18, 1968; CGFR 68-65, 33 FR 19985, Dec. 28, 1968; CGFR 70-
10, 35 FR 3709, Feb. 25, 1970]