[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: 49CFR193.2155]

[Page 130-131]
 
                        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 C_Design
 
Sec. 193.2155  Structural requirements.

    (a) The structural members of an impoundment system must be designed 
and constructed to prevent impairment of the system's performance 
reliability and structural integrity as a result of the following:
    (1) The imposed loading from--
    (i) Full hydrostatic head of impounded LNG;
    (ii) Hydrodynamic action, including the effect of any material 
injected into the system for spill control;
    (iii) The impingement of the trajectory of an LNG jet discharged at 
any predictable angle; and
    (iv) Anticipated hydraulic forces from a credible opening in the 
component or item served, assuming that the discharge pressure equals 
design pressure.
    (2) The erosive action from a spill, including jetting of spilling 
LNG, and any other anticipated erosive action including surface water 
runoff, ice formation, dislodgement of ice formation, and snow removal.
    (3) The effect of the temperature, any thermal gradient, and any 
other anticipated degradation resulting from sudden or localized contact 
with LNG.
    (4) Exposure to fire from impounded LNG or from sources other than 
impounded LNG.
    (5) If applicable, the potential impact and loading on the dike due 
to--
    (i) Collapse of the component or item served or adjacent components; 
and

[[Page 131]]

    (ii) If the LNG facility adjoins the right-of-way of any highway or 
railroad, collision by or explosion of a train, tank car, or tank truck 
that could reasonably be expected to cause the most severe loading.
    (b) An LNG storage tank must not be located within a horizontal 
distance of one mile (1.6 km) from the ends, or \1/4\ mile (0.4 km) from 
the nearest point of a runway, whichever is longer. The height of LNG 
structures in the vicinity of an airport must also comply with Federal 
Aviation Administration requirements in 14 CFR Section 1.1.

[45 FR 9203, Feb. 11, 1980, as amended by Amdt. 193-17, 65 FR 10959, 
Mar. 1, 2000]