[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: 46CFR39.20-13]

[Page 506]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 39_VAPOR CONTROL SYSTEMS--Table of Contents
 
                   Subpart 39.20_Design and Equipment
 
Sec. 39.20-13  High and low vapor pressure protection for tankships--T/ALL.

    Each tankship vapor collection system must be fitted with a pressure 
sensing device that senses the pressure in the main vapor collection 
line, which:
    (a) Has a pressure indicator located on the vessel where the cargo 
transfer is controlled; and
    (b) Has a high pressure and a low pressure alarm that:
    (1) Is audible and visible on the vessel where cargo transfer is 
controlled;
    (2) Alarms at a high pressure of not more than 90 percent of the 
lowest pressure relief valve setting in the cargo tank venting system; 
and
    (3) Alarms at a low pressure of not less than four inches water 
gauge (0.144 psig) for an inerted tankship, or the lowest vacuum relief 
valve setting in the cargo tank venting system for a non-inerted 
tankship.