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 The
HT-100 was designed especially to test the large underground
hydrant lines that transport fuel at airports. The only
other leak detection systems on the market require airports
to inject fuel additives into a pipeline—additives
that can be detected, if fuel leaks out, by sensors
in the ground or by tracer wires that must be installed
in trenches along the pipeline. Using fuel additives
is expensive, and tracer wires typically have a life
expectancy of only two to three years. Furthermore,
the results of this type of test can be affected by
soil conditions. In contrast, the HT-100 can detect
leaks as small as 0.004 % of pipeline volume in a 1
1/2-hour test. The test is generally
conducted at night so as to have the least impact on
operations. The optional 3-hour test allows the HT-100
to detect leaks as small as 0.0021% of pipeline volume.
The HT-100, weighing 2,500 pounds, is
9 feet high, 4 feet wide and 8 feet long. It requires
110 or 220 VAC electrical current. It attaches to any
3/4-inch to 1 1/2-inch
connection along the pipeline by means of a flexible
hose or a 1-inch steel pipe, depending on the pressure
in the pipeline.
The HT-100 works by calculating the expected
change in volume as the outside ground and air conditions
cause temperature changes in the fuel in the pipeline.
If the volume of fuel does not change in accordance
with expectations, there is a leak in the system. HT-100
results are accurate even if vapor is trapped in the
line or surge suppressors are in operation. HT-100 systems
are in use at major
airports, terminals and military facilities throughout
North America.
 
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The Mobile HT-100 delivers the same performance
as the standard HT-100 while offering greater flexibility.
It is a popular choice at facilities that want to make
maximum use of their equipment across a widespread network
of lines. The mobile system is typically mounted in
a truck or trailer for easy deployment to distant lines.
Testing Services
Vista offers testing services
conducted with its HT-100 system.
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