Sodium Hypochlorite Storage Tanks / Bleach Storage Tanks
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Double wall plastic tanks are an excellent choice
for Bleach (Sodium
Hypochlorite) storage. Double wall tanks offer
excellent secondary containment protection against
spills of hazardous chemicals like Bleach (Sodium
Hypochlorite) with a minimum footprint. |
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Bleach (Sodium Hypochlorite) is a dangerous chemical to
store and requires great care to store it safely. One
factor in safe storage of Sodium Hypochlorite is to
provide secondary containment in case a spill takes
place. A double wall storage tank has secondary
containment built in to the design. |
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Steel, Fiberglass or Poly?
Sodium
Hypochlorite is a poor match for stainless steel tanks
so one of the natural choices has been plastic storage
tanks. Polyethylene tanks hold much of the Bleach used
by industry and water treatment operations today. |
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There are differences in Polyethylenes?
When you start looking for the right Polyethylene tank
for storage of Sodium Hypochlorite, things get a little
tricky. While resin maker Exxon has done studies with
the University of Nebraska, some tank makers continue to
go against recommendations from Exxon that result from
that study. As a result, you could be tricked into a
bad choice of tank materials and end up getting a tank
that has a shorter useful life than is otherwise
available. |
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High
Density Polyethylene versus Crosslink Polyethylene.
There
are several variations of Polyethylene. The two that
come into play with Sodium Hypochlorite are High Density
Polyethylene and Crosslink Polyethylene. Crosslink is
an older type of polyethylene that is more expensive,
not recyclable and is not ‘weld-able’ using
thermoplastic welding. It has advantages when it comes
to the storage of a few chemicals but, according to
Exxon, it is not the best choice for tanks that will
store sodium hypochlorite. Exxon’s study shows clear
benefits from using HDPE (High Density Polyethylene) for
the storage of Sodium Hypochlorite. Click
here and we will send the Exxon report to you. |
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Tank
Location makes a difference!
Beyond the selection of High Density Polyethylene as the
material for the tank, the planned location also affects
tank details. |
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Indoor:
Indoor Tanks where exposure
to Ultra Violet rays will be low can be manufactured
from Natural color resin. It is a translucent white and
since you can see the level of the liquid, there is no
need for a sight gauge. |
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Indoor Tanks where exposure to Ultra Violet rays will be
moderate can be made from Black colored resin. The fill
level will not be visible so a sight gauge or other
level indicator is a very good idea. |
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Outdoor:
Outdoor tanks can be made
from Natural color resin if they are going to be coated
with polyurethane foam insulation and covered with a
mastic coating. Fill level is not visible through the
foam. |
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Outdoor tanks that will not be coated with insulation
should be opaque. Depending on the climate and degree
of exposure to direct sunlight, either a black or opaque
white tank could be suitable. |
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What
grade of tank?
Polyethylene tanks are manufactured and rated based on
the weight per gallon of the liquid they are able to
hold. Beyond the weight of the liquid, other factors
such as the effect of the chemical on the tank over time
must be taken into account. We recommend using tanks
with a specific gravity of 1.9 or higher for storing
Sodium Hypochlorite. |
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Sales - 713-203-4650
