2.8
TELEMETERING OR RECORDING GAUGES
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NOTE: On distribution systems supplied by a single
district pressure regulating station, the designer
will determine the necessity of installing
telemetering or recording gauges in the supply line,
taking into consideration the number of buildings
supplied, the operating pressures, the capacity of
installation, and other operating conditions.
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Each distribution system supplied by more than one district pressure
regulating station shall be equipped with telemetering or recording
pressure gauges to indicate the gas pressure in the district line.
PART 3
EXECUTION
3.1
EXCAVATION AND BACKFILLING
Earthwork shall be as specified in Section 02300 EARTHWORK.
3.2
GAS MAINS
Pipe for gas mains shall be [steel] [polyethylene] [or] [fiberglass].
[Steel pipe and fittings shall be coated with protective covering as
specified.] [Polyethylene or fiberglass mains shall not be installed
aboveground.]
3.3
SERVICE LINES AND EMERGENCY GAS SUPPLY CONNECTION
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NOTE: Service line isolation valve will be located
as close to the supply main as possible but at a
safe distance from traffic lanes.
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Service lines shall be constructed of materials specified for gas mains and
shall extend from a gas main to and including the point of delivery within
1.5 meters (5 feet) 5 feet of the building. The point of delivery is the
[meter set assembly] [service regulator] [shutoff valve]. The service
lines shall be connected to the gas mains [as indicated] [through service
tees, with end of run plugged]. Where indicated, service line shall be
provided with an isolation valve of the same size as the service line. The
service lines shall be as short and as straight as practicable between the
point of delivery and the gas main and shall not be bent or curved
laterally unless necessary to avoid obstructions or otherwise permitted.
Service lines shall be laid with as few joints as practicable using
standard lengths of pipe. Shorter lengths shall be used only for closures.
Polyethylene or fiberglass service lines shall not be installed
aboveground [except as permitted in ASME B31.8].
3.3.1
Emergency Gas Supply Connection
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NOTE: If it is expected that a portable gas tank
providing pressure regulated gas would be provided
during an emergency, locate the emergency gas
connection downstream of the building's pressure
SECTION 02556A
Page 18
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