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Industrial
Fire Suppression Systems
Frequently
Asked Questions (FAQs)
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- Does
ANSUL® offer fixed nozzle systems
to protect hazards involving combustible
metals?
- What
is the maximum distance that I can
locate a Remote Pneumatic Actuator
away from the Large Dry Chemical
System storage tank?
- Does
ANSUL offer fixed nozzle systems
to protect hazards involving combustible
metals?
Yes, we can offer this type of
system, however it is important
to understand
the principals involved in protecting
these hazards because not all
combustible
metal hazards can be protected
with fixed nozzle systems. MET-L-X®,
LITH-X®,
and NA-X® metal agents work
by smothering a fire, not by chemically
inhibiting it. Therefore, the agents
work best on horizontal surfaces
and must be applied in a manner
to distribute the agent evenly
over
the surface of the hazard area.
ANSUL recommends a layer of approximately
1” of agent over the surface
of the fuel, this translates to
10 lbs. of agent per square foot
of area to be protected.
Because of the clinging ability
of MET-L-X and NA-X agents, they
may be used to a limited extent
on three-dimensional surfaces;
but
design of these systems requires
special expertise.
In most cases, hazards involving
combustible metal fuels are better
protected with hand portable, wheeled,
and/or skid mounted units. These
are available with all of the agents
listed above.
For more information, order the
“Fighting Fires with Dry Powder
Agents” White Paper (Form
No. F-98172).
- What
is the maximum distance that I can
locate a Remote Pneumatic Actuator
away from the Large Dry Chemical
System storage tank?
The
maximum distance depends on a number
of factors such as the type of pipe
or tubing used for the interconnection,
the size of the cartridge on the
actuator, and the components being
actuated by the Remote Actuator.
Although the actual maximum distance
can be calculated using a Pressure/Volume/Temperature
equation, a designer can use the
table listed below as a general
guideline. Selector Valves in systems
will have a detrimental effect on
these distances.
Cartridge
Size |
Maximum Length
of
1⁄4” O. D. Tubing |
Maximum Length
of
1⁄4” Pipe |
| LT-5 |
150 ft. |
25 ft. |
| LT-10 |
300 ft. |
50 ft. |
| LT-20 |
600 ft. |
100 ft. |
| LT-30 |
900 ft. |
150 ft. |
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