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Tanks - Cylindrical - Open Top - Flat Bottom
[COF] |
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Saint-Gobain
Performance Plastics high-performance tanks are the best and
toughest in the industry. Exacting CAD-based designs, the
highest quality virgin resins and tough construction provide
excellent solutions for general purpose applications. The
tanks are translucent and feature molded-in graduations.
Each tank comes with a matching cover the same thickness as
the wall. The open-top unit covers fit like a shoe box;
bolted or welded covers are available upon request.
Closed-dome tanks are available for applications requiring a
completely closed vessel. The 6" threaded polypropylene
covers prevent evaporation and spills. Our open-top tanks
are rated for use with 1.8 specific gravity media. If a
fiberglass casing is used, the rating goes up to 2.2.
Casings provide structural support and prevent bulging at
the bottom of the tank. They should be used with rectangular
units with any dimension greater than 18 inches. Casings are
also required for use with media having a specific gravity
greater than 1.8 or for use at prolonged elevated
temperatures. |
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Our stands,
mixers, and casings have been pre-engineered for
compatibility. Simply choose your tank size and the size
codes of the accessories will match.
Fabrication is available for all Saint-Gobain Performance
Plastics tanks. Modifications can be made to the covers or
the sides. Welded and mechanical fittings can be
installed, as well as a full line of accessories.
Contact Us
for quotations. |
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Materials Overview |
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High Density
Polyethylene (HDPE) |
Cross-Linked
Polyethylene (XLPE) |
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FDA
21 CFR 177.1520
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Hard,
Smooth Finish
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Very
Good Chemical Resistance
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Good
Stress-Crack Resistance
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Max
Service Temp-140°F
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Translucent White
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Not
FDA
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Cannot be welded
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Better Chemical Resistance to HDPE
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Excellent Stress-Crack Resistance
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Max
Service Temp-140°F
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Yellow
(Bulk Tanks-Gray)
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Polypropylene
(PP) |
Polyvinylidene Fluoride (PVDF) |
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FDA
21 CFR 177.1520
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USP
Class VI, Non-Cytotoxic
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Hard,
Smooth Finish
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Very
Good Chemical Resistance
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Excellent
Stress-Crack Resistance
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Max
Service Temp-220°F
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White
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FDA
21 CFR 177.2510
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High-Purity Material/Low Extractables
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Larger
sizes require casings
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Inherent
UV Resistance
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Excellent
Chemical Resistance
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Max
Service Temp-230°F
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Off-White
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Maximum
service temperature listings refer to temperatures that
should not be exceeded for the materials utilized in the
specific product line. Many factors including media,
specific gravity of media, external stresses, product
geometry, environment, and others affect suitability of
material. |
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Structural
Designs
Cylindrical tanks feature a
stepped-flange design that adds rigidity and
strength while helping to contain drips. Tanks over
30 gallons feature a slightly raised bottom that
channels liquids to tank walls and fittings. Spoke
bottoms reinforce larger tanks over 55 gallons and
provide near-total drainage.
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Flat-Bottom Cylindrical Tanks
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All tanks come with covers.
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Brim capacity 10% over.
WARNING: Never use FRP
casings alone as a tank. Always use a liner. For
continuous service at elevated temperatures or
storage of high specific-gravity materials, always
use an FRP casing with your tank.
Flat-Bottom Cylindrical Tanks Chart (PDF) |
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Open Top Cylindrical Tanks
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Every size, every shape in stock
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Natural translucent resin permits visual
determination of fluid level in the tank
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All tanks are rotomolded from virgin,
FDA-approved linear polyethylene
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Tough, corrosion- and impact-resistant
material
STI's complete inventory of top-quality
rotomolded cylindrical tanks assures our
ability to provide what you need, when you
need it. A tank molded in virgin linear
polyethylene is the ideal choice for
storage, mixing and/or feeding a vast array
of liquids.
The Open Top Cylindrical Tanks
are ideal for a variety of applications
including: water treatment, wastewater
treatment, plating, process, 'tank-in-tank'
systems for double containment of hazardous
solutions, chemical feed day tanks (see CXF/CXC
tanks for bulk storage), batch mixing and
more. |
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Your application may demand
the mechanical strength and chemical
resistance to withstand the strongest acids,
caustics, and other chemicals. You may need
the cleanliness to handle the extremes of
ultra-pure water; the purity to maintain
ionic contaminants in the parts-per-billion
range. Either way, our team of
application specialists and plastic
fabricators can put together the right
system for you.
Available Tank Dimensions (PDF) |
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