[Code of Federal Regulations]
[Title 49, Volume 3]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR193.2513]

[Page 134-135]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                       TRANSPORTATION (CONTINUED)
 
PART 193_LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS--
Table of Contents
 
                          Subpart F_Operations
 
Sec. 193.2513  Transfer procedures.

    (a) Each transfer of LNG or other hazardous fluid must be conducted 
in accordance with one or more manuals of written procedures to provide 
for safe transfers.
    (b) The transfer procedures must include provisions for personnel 
to:
    (1) Before transfer, verify that the transfer system is ready for 
use, with connections and controls in proper positions, including if the 
system could contain a combustible mixture, verifying that it has been 
adequately purged in accordance with a procedure which meets the 
requirements of AGA ``Purging Principles and Practice.''
    (2) Before transfer, verify that each receiving container or tank 
vehicle does not contain any substance that would be incompatible with 
the incoming fluid and that there is sufficient capacity available to 
receive the amount of fluid to be transferred;
    (3) Before transfer, verify the maximum filling volume of each 
receiving container or tank vehicle to ensure that expansion of the 
incoming fluid due to warming will not result in overfilling or 
overpressure;
    (4) When making bulk transfer of LNG into a partially filled 
(excluding cooldown heel) container, determine any differences in 
temperature or specific gravity between the LNG being transferred and 
the LNG already in the container and, if necessary, provide a means to 
prevent rollover due to stratification.
    (5) Verify that the transfer operations are proceeding within design 
conditions and that overpressure or overfilling does not occur by 
monitoring applicable flow rates, liquid levels, and vapor returns.
    (6) Manually terminate the flow before overfilling or overpressure 
occurs; and
    (7) Deactivate cargo transfer systems in a safe manner by 
depressurizing, venting, and disconnecting lines and conducting any 
other appropriate operations.
    (c) In addition to the requirements of paragraph (b) of this 
section, the procedures for cargo transfer must be located at the 
transfer area and include provisions for personnel to:

[[Page 135]]

    (1) Be in constant attendance during all cargo transfer operations;
    (2) Prohibit the backing of tank trucks in the transfer area, except 
when a person is positioned at the rear of the truck giving instructions 
to the driver;
    (3) Before transfer, verify that:
    (i) Each tank car or tank truck complies with applicable regulations 
governing its use;
    (ii) All transfer hoses have been visually inspected for damage and 
defects;
    (iii) Each tank truck is properly immobilized with chock wheels, and 
electrically grounded; and
    (iv) Each tank truck engine is shut off unless it is required for 
transfer operations;
    (4) Prevent a tank truck engine that is off during transfer 
operations from being restarted until the transfer lines have been 
disconnected and any released vapors have dissipated;
    (5) Prevent loading LNG into a tank car or tank truck that is not in 
exclusive LNG service or that does not contain a positive pressure if it 
is in exclusive LNG service, until after the oxygen content in the tank 
is tested and if it exceeds 2 percent by volume, purged in accordance 
with a procedure that meets the requirements of AGA ``Purging Principles 
and Practice;''
    (6) Verify that all transfer lines have been disconnected and 
equipment cleared before the tank car or tank truck is moved from the 
transfer position; and
    (7) Verify that transfers into a pipeline system will not exceed the 
pressure or temperature limits of the system.