Current through Register Vol. 50, No. 9, September 20, 2024
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:
a. full hydrostatic head of impounded LNG; [
49 CFR
193.2155(a)(1)(i)
]
b. hydrodynamic action, including
the effect of any material injected into the system for spill control; [
49 CFR
193.2155(a)(1)(ii)
]
c. the impingement of the
trajectory of an LNG jet discharged at any predictable angle; and [
49 CFR
193.2155(a)(1)(iii)
]
d. anticipated hydraulic forces
from a credible opening in the component or item served, assuming that the
discharge pressure equals design pressure; [
49 CFR
193.2155(a)(1)(iv)
]
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; [
49 CFR
193.2155(a)(2)]
3. the effect of the temperature, any thermal
gradient, and any other anticipated degradation resulting from sudden or
localized contact with LNG; [
49 CFR
193.2155(a)(3)]
4. exposure to fire from impounded LNG or
from sources other than impounded LNG; [
49 CFR
193.2155(a)(4)]
5. if applicable, the potential impact and
loading on the dike due to:
a. of the
component or item served or adjacent components; and [
49 CFR
193.2155(a)(5)(i)
]
b. 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. [
49 CFR
193.2155(a)(b)(ii)
]
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. [
49 CFR
193.2155(b)]
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
30:551.C.
