ASCE 25-97 EARTHQUAKE ACTUATED AUTOMATIC GAS SHUTOFF
DEVICES, dated March 27, 1998, which includes a test
procedure to verify that the valve will activate
during strong ground shaking but will not activate
for minor ground shaking or accidental bumping by a
pedestrian or vehicle.
The State of California, Division of the State
Architect/Real Estate Services Division maintains a
list of devices that have been tested and conform to
the ASCE Standard; inquiries can be directed to
telephone no. 916-445-2600.
Show the earthquake actuated automatic gas shutoff
on the drawings when required in the project. The
designer must fill the bracketed blank and ensure
that a copy of ASCE 25-97 is included with the
Contract documents.
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Earthquake Actuated Automatic Gas Shutoff devices shall conform to [_____]
[and] [requirements furnished by the Contracting Officer], and shall be
listed by the State of California, Division of the State Architect as being
tested and in conformance with specified requirements. The system shall
safely interrupt the flow of gas to the building due to strong ground
shaking of an earthquake.
2.6
EMERGENCY GAS SUPPLY CONNECTION
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NOTE: Include emergency gas supply connections when
the customer determines the ability to provide gas
to the building is necessary during an outage of the
gas distribution system. Show the emergency gas
piping connection on the drawings when required in
the project.
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The emergency gas supply connection shall consist of piping (same size as
service line) and accessories that will enable a portable, commercial-sized
gas cylinder system to be connected to the gas piping system. This
connection shall be capped to prevent gas leakage with a lockable manual
valve located to be capable of shutting off flow. The entire assembly
should be contained in a weatherproof, lockable box. The box shall contain
permanently installed written instructions stating the type and pressure of
the gas allowed to be connected to the line. The instructions shall also
indicate and provide specific instruction for testing of the integrity of
the building's gas system with an inert gas before the fuel gas connection
is made. A subplate shall be provided in the box that is required to be
unbolted to gain access to the connection. The subplate shall contain a
warning regarding the potential consequences of using gas other than that
specified or of failing to test system integrity before hooking up
emergency fuel supply.
2.7
PROTECTIVE COVERING MATERIALS
Continuously extruded polyethylene and adhesive coating system materials
shall conform to NACE RP0185, Type A.
SECTION 02556A
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