Chem-Tainer Industries - Rotationally Molded Tanks
For more than 35 years, long before corporate pledges and government regulations, Chem-Tainer Industries, a visionary leader in plastic molding, has been designing, developing and manufacturing the very products used by all of these industries to protect and preserve the environment. At Chem-Tainer, our commitment is to manufacture quality products that are designed to protect the environment. Our manufacturing process and our raw materials are non-polluting and non-toxic. Most of our products are environmentally friendly and recyclable.
Tanks information is arranged on this page by the following categories. Click to link to the section of interest.
Horizontal Tanks - Low Profile - For Stationary or Vehicle Mounting
Chem-Tainer Industries offers you a selection of materials that are by far the best suited for molded tanks and containers for use with aggressive corrosive chemicals as well as food products. Our 35 plus years of experience in rotational molding, combined with our professional staff of chemical, mechanical and plastics engineers, enable us to provide you with the highest quality rotationally molded tanks and containers available in the industry.
The following is a brief description of these materials:
A high quality thermoplastic that has outstanding resistance to both physical and chemical attack. The overall general toughness and excellent chemical resistance to a wide array of wet and dry industrial chemicals and food products make polyethylene ideally suited for storage tanks and containers.
Polyethylene is translucent and its natural color ranges from slightly off white to creamy yellow, depending on wall thickness and type. Ultraviolet light stabilizers are added for use in outdoor applications. Colors are available on request for a nominal up charge.
Linear Polyethylene is available as low, medium and high density. Most products offered in this catalog are molded of linear medium density polyethylene (LMDPE) and linear high-density polyethylene (LHDPE). They have superior mechanical properties, high stiffness, excellent low temperature impact strength and excellent environmental stress crack resistance. The linear polyethylene used by Chem-Tainer Industries meets specifications contained in FDA regulation 21CFR177.1520 (c) 3.1 and 3.2 and so may be used as an article or a component of articles intended for use in contact with food, subject to any limitations in the regulations. Maximum operating temperature for linear polyethylene is 140° F.
Crosslinkable polyethylene is a high-density polyethylene that contains a crosslinking agent, which reacts with the polyethylene during molding, forming a crosslinked molecule similar to a thermoset plastic. This reaction improves toughness and environmental stress crack resistance. Crosslinked Polyethylene (XLPE) is not weldable and does not meet FDA requirement 21CFR177.1520. Maximum operating temperature of crosslinked polyethylene is 150° F.
Polypropylene is a rigid plastic that has a higher operating temperature limit than polyethylene: 212° F. It offers good chemical resistance, has a high resistance to stress crack, and is autoclavable. Polypropylene (PP) is not recommended for applications in sub-freezing temperature or where high impact strength is needed. A rough, irregular interior surface is common characteristic of molded polypropylene.
Material Selection - Considerations to Material Selection
Continued or prolonged service with contents at elevated temperatures can shorten the life of a tank. The effects of the temperature will depend on the chemical content and its specific gravity, tank size and configuration, material of construction, wall thickness and if there are any external supports on the tank.
Exposure to Ultraviolet Light
Unprotected thermoplastics exposed to sunlight for an extended period of time absorb ultraviolet (UV) light, which can cause discoloration, embrittlement and eventual cracking. Fluorescent lighting has a similar effect. Elevated temperatures can accelerate the embrittlement process. Chem-Tainer Industries products are molded from materials utilizing the latest technology for UV stabilizers, which greatly reduce the harmful effects of UV, light. For greater protection, keep tanks out of direct sunlight or order dark colored tanks, which will further retard the effect of UV light.
Environmental Stress Cracking
Certain surface active materials, although they have no chemical effect on polyethylene, can accelerate its cracking when under stress, such as liquid detergents and ultra pure water. Elevated temperatures tend to accelerate the cracking. Although all polyethylenes are subject to stress cracking, some are more resistant to it than others. The degree of stress on the plastic has a direct bearing on its resistance, therefore a tank and system should be designed to minimize stress. Chem-Tainer Industries tanks are molded virtually stress free, employing materials that are highly resistant to environmental stress cracking and hence are less prone to cracking than fabricated tanks. Stress cracking agents are surface-active materials. Proper care should be taken to reduce stress at fittings, bands, tie down lugs, etc.
|General Characteristics||Linear Polyethylene||XLPE (crossed linked)||PP polypropylene|
|Maximum Service Temperature||140 F||150 F||212 F|
|Chemical Resistance||Very Good||Very Good||Very Good|
|Stress Cracking Resistance||Excellent||Excellent||Excellent|
|General Toughness||Very Good||Very Good||Fair|
|Color||WH Translucent||Off WH Translucent||Off WH Opaque|
|Density (gm/cc)ASTM: D1505||0.94||0.94||0.90|
Chem-Tainer Industries nationwide network of 10 factories with over 500,000 square feet dedicated to manufacturing. North Babylon, NY; West Babylon, NY; Lombard, IL; Hummelstown, PA; Jacinto City, TX; Compton, CA; Arlington, TN; Hallandale, FL; Cranston, RI; Bohemia, NY
Chem-Tainer Industries warrants its products to be free of defects in material and workmanship, for a period of twelve (12) months from the date of shipment with the exception of the IA,IC,IX,JA,JC,JP,LA,LC,LP,MA and MC series, which have a thirty-six (36) month warranty duration. This warranty is extended to the original purchaser provided that the product has not been altered or neglected and is installed and used in a normal and appropriate manner as per Chem-Tainer Industries written instructions. The Buyers sole and exclusive remedy for any defect or failure of performance of the product shall be the return of the product with proof of purchase and shipping charges prepaid to Chem-Tainer. Chem-Tainer, at its option, will repair, replace, or refund the purchase price of any product found upon inspection by Chem-Tainer to be defective.
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