| (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:
Attached Graphic
(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.
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| Source Note: The provisions of this §14.2101 adopted to be effective May 26, 2003, 28 TexReg 4100; amended to be effective December 24, 2012, 37 TexReg 9921; amended to be effective February 15, 2021, 46 TexReg 1044; amended to be effective February 7, 2023, 48 TexReg 512 |
