16 Tex. Admin. Code § 14.2101 - System Protection Requirements
(a)
In addition to NFPA 59A §§12.9.3 and 13.2.3, this section applies to
the protection from tampering and damage of stationary LNG installations,
including LNG transfer systems, dispensing systems, and storage
containers.
(b) Fencing at LNG
stationary installations shall comply with the following:
(1) Fencing material shall be solid
construction of noncombustible material or chain link type with wire at least
12 1/2 American wire gauge in size.
(2) Fencing shall be at least six feet in
height at all points. Fencing may be five feet in height when topped with at
least three strands of barbed wire, with the strands four inches
apart.
(3) Uprights, braces, and
cornerposts of the fence shall be composed of noncombustible
material.
(4) Uprights, braces, and
cornerposts of the fence shall be anchored in concrete a minimum of 12 inches
below the ground.
(5) All fenced
enclosures shall have at least one gate suitable for ingress and egress. All
gates shall be locked whenever the area enclosed is unattended.
(6) A minimum clearance of two feet shall be
maintained between the fencing and any part of an LNG transfer system,
dispensing system, or storage container that is part of a stationary
installation.
(7) Fencing which is
located more than 25 feet from any point of the LNG transfer system, dispensing
system, or storage containers shall be designated as perimeter fencing. If the
LNG transfer system, dispensing system, or storage container is located inside
perimeter fencing and is subject to vehicular traffic, it shall be protected
against damage according to subsection (c) of this section.
(8) The storage and compression area must be
completely enclosed by fencing.
(9)
Where fencing is not used to protect the installation, then valve locks, a
means of locking the electric control for the compressors, or other suitable
means shall be provided to prevent unauthorized withdrawal of LNG.
(c) Guardrails at LNG stationary
installations shall comply with the following:
(1) Vertical supports for guardrails shall be
at least four-inch concrete-filled schedule 40 steel pipe or material with
equal or greater strength. The vertical supports shall be capped on top,
anchored in concrete at least 36 inches below the ground, and rise at least 30
inches above the ground. Supports shall be spaced four feet apart or
less.
(2) The top of the horizontal
guardrailing shall be secured to the vertical supports at least 30 inches above
the ground. The horizontal guardrailing shall be at least three-inch Schedule
40 steel pipe or other material with equal or greater strength. The horizontal
guardrailing shall be welded or bolted to the vertical supports with bolts of
sufficient size and strength to prevent damage to the protected equipment under
normal conditions including the nature of the traffic to which the protected
equipment is subjected.
(3)
Openings in the horizontal guardrailing shall not exceed 36 inches. Only one
opening is allowed on each side of the guardrailing. A means of temporarily
removing the horizontal guardrailing and/or vertical supports to facilitate the
handling of heavy equipment may be incorporated into the horizontal
guardrailing and vertical supports. In no case shall the protection provided by
the horizontal guardrailing and vertical supports be decreased. Transfer hoses
from the bulkhead shall be routed only over the horizontal guardrailing or
through the 45-degree opening in front of the bulkhead.
(4) A minimum clearance of 24 inches shall be
maintained between the railing and any part of an LNG transfer system,
dispensing system, or storage container.
(d) Protection shall be maintained in good
condition at all times in accordance with the standards set forth in this
section. AFS may impose additional requirements to ensure the safety of
personnel and the general public.
(e) The operating end of each container,
including the material handling equipment and the entire dispensing system, and
any part of the LNG transfer system, dispensing system, or storage container
which is exposed to collision damage or vehicular traffic shall be protected
from this type of damage.
(f)
Stationary LNG installations shall comply with the sign and lettering
requirements specified in Table 1 of this section and the following:
(1) Unless colors are specified, lettering
shall be a color in sharp contrast to the background color of the sign and
shall be easily readable.
(2) Signs
shall be visible from each point of transfer;
(3) Signs on emergency shutdown devices shall
be permanently affixed;
(4) Signs
bearing the words, "NATURAL GAS," shall be located on all operating sides of
dispensers; and
(5) Signs
indicating the licensee's name shall be located at either the vehicle dispenser
or refueling area, or at the loading or unloading area.
(g) At least two monitoring sensors shall be
installed at all stationary installations to detect hazardous levels of LNG.
Sensors shall activate at not more than 25% of the lower flammability limit
(LFL) of LNG. If the level exceeds one-fourth of the LFL, the sensor shall
either shut the system down or activate an audible and visual alarm. The number
of sensors to be installed shall comply with the area of coverage for each
sensor and the size of the installation. The sensors shall be installed and
maintained in accordance with the manufacturer's instructions.
Notes
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