CLEAN AIR COUNCIL PRESENTATION for Durbin WV 8-7-14
AERIAL VIEWS HELICOPTERS - TRANSMISSION PIPES M E T E R I N G S T A T I O N S
EVERY 2 - 5 MILES - HELICOPTERS CHECK FOR LEAKS
"In addition to compressing natural gas to reduce its volume
and push it through the pipe, metering stations are placed
periodically along interstate natural gas pipelines.
These stations allow pipeline companies to monitor
the natural gas in their pipes.
Essentially, these metering stations measure the flow of gas
along the pipeline, and allow pipeline companies to ‘track’
natural gas as it flows along the pipeline.
These metering stations employ specialized meters
to measure the natural gas as it flows through the pipeline,
without impeding its movement."
Source: Natural Gas - Transport - Metering Stations
"Pipeline companies install VALVES along a gas pipeline system
to provide a means of controlling flow.
The valves may be spaced as close together as
EVERY FIVE MILES or as far apart as TWENTY MILES
according to standards established by applicable safety codes.
The valves normally are open, but when a section of pipeline requires maintenance, operational engineers close the valves to isolate that section of the pipeline.
Once isolated, the maintenance crew can vent the gas from that section of the pipeline and proceed with its work.
SOURCE: Interstate Natural Gas Association of America [INGAA]
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