Tamco® Tank Material Information
Linear Low Density Polyethylene
resin used for rotationally molded tanks:
Density: 0.937 g/cm3
Tensile Strength at Yield: 2,400 psi
Elongation at Yield: 20%
Flexural Modulus: 90,000 psi
Impact Strength -40°F, 0.125”: 60 ft-lb
Impact Strength -40°F, 0.250”: 160 ft-lb
Polypropylene sheet used for welded polypropylene tanks and trays:
Tensile Strength: 4,900 psi
Elongation at Yield: 9%
Flexural Modulus: 190,000 psi
High Density Polyethylene sheet used for
welded polyethylene tanks and trays:
Density: 0.96 g/cm3
Tensile Strength: 4,600 psi
Elongation at Break: >600%
Flexural Modulus: 225,000 psi
Note: Properties are typical and it is up to the end user to determine suitability
of a Tamco® Tank material for their application.
Chemical Service Temperatures
Continued or prolonged service with certain chemicals at elevated
temperatures may reduce the life of polyethylene and polypropylene tanks.
The effects of the temperature on the material will depend on the chemical,
specific gravity of chemical, size and model of tank the chemical is to be
stored in, and the tank wall thickness. Depending upon the chemicals to
be stored, Tamco® Polyethylene tanks will handle temperatures of up to 140°F
while the Tamco® Polypropylene tanks will handle up to 200°F. Please note
that higher service temperatures will lower the specific gravity rating of the
Ultraviolet Light Exposure
Tamco® Polyethylene tanks that are
molded of Linear Low Density Polyethylene are UV Stabilized. UV stabilizers
that are added to the resin will reduce the harmful effects of ultraviolet
light exposure and are intended to extend the life of a tank over similar materials
that are not compounded with stabilizers.
Welded tanks are not UV stabilized and direct sun light should be
The standard Tamco® tanks have a 1.5 specific gravity. Specific Gravity is
the ratio of the chemical weight per gallon divided by the weight of water per
gallon (8.33 lb. per gallon). As an example, if a chemical weighs 10 lb.
per gallon, the specific gravity of the chemical is 10.0/8.33 = 1.2. (Metric:
kilogram/cubic meter or gram/liter).
Note: We are able to custom mold and weld tanks with thicker walls to handle
The standard color for Tamco® tanks
is natural (translucent white). We do offer a line of brine tanks and covers
which are opaque black.
Tamco® Natural Polyethylene Tanks
are manufactured of a Linear Low Density Polyethylene that meets FDA standards.
The resin complies with FDA regulation 21 CFR 177.1520 (olefin polymers),
Paragraphs (c) 3.1a and (c) 3.2a, and may be used as articles or components of
articles intended for use in contact with food, including use in articles used
for packing or holding food during cooking at temperatures not in excess of
Tamco® welded polypropylene tanks are made from homopolymer polypropylene sheet
and welding rod that meet FDA requirements.
Tamco® welded polyethylene tanks and trays are made from high density
polyethylene sheet and rods that meet FDA requirements.
tanks are BPA and phthalate free.
The information contained in this article is for general information purposes only. The information is provided by
United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or
warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with
respect to the website or the information, products, services, or related graphics contained on the website for any purpose.
Any reliance you place on such information is therefore strictly at your own risk.
In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss
or damage, or any loss or damage whatsoever arising from loss of materials, time or profits arising out of,
or in connection with, the use of this information.