View A Video on Plastic Tanks - A Quick Introduction
Plastic tanks, also commonly referred to as poly tanks, are general-purpose containment vessels that are used in a variety of industrial applications in order to store diverse substances. Available in a wide range of configurations, plastic tanks can feature different dimensions, orientations (including horizontal or vertical), colors, sizes, shapes and more in order to fit the needs of the specific requirement. In fact, plastic tank sizes can range anywhere from as small as 15 gallons to as immense as 11,500-16,000 gallons.
Plastics work well as tank materials because they are typically less likely to react to any liquid that may be stored inside the tank, which is particularly relevant for the storage and processing of aggressive chemicals such as acids and caustics for industrial chemical applications. Additional industries and applications that benefit from the utilization of plastic tanks versus metallic tanks, such as stainless steel tanks, include: agriculture, for use in irrigation and fertilization systems for food production applications; petrochemical, for the storage and transport of oil and gas; industrial, used in applications such as electroplating, recycling, parts washing and more; and wastewater, in order to be used in municipal waste water treatment plants and other water treatment facilities.
Lastly, there is also a very large group of plastic tanks that are categorized by there application/design. For industrial application, some examples of the more common types of these include cone bottom tanks, double wall tanks, storage tanks and septic tanks. Categorized by design, cone bottom tanks and double wall tanks are designed in a specific manner in order to fit the needs of the desired application. Cone bottom tanks, for instance, are designed so that distribution from the bottom of the tank is both incredibly simple and highly efficient. Double wall tanks, on the other hand, are fabricated with an extra layer of plastic material in order to reinforce the wall (now walls) of the tank, and provide additional safety in the transportation, storage and processing of aggressive materials. Categorized by application, storage tanks and septic tanks are used for specific purposes, although they can also seem very broad. For instance, storage tanks are used solely for storage applications; however, storage can be required in so many different industries, for varied materials and purposes that storage can be a very broad category of plastic tank in itself. Septic tanks are used for a much more specific purpose, as they are defined as tanks used to store substances utilized in sewage processes. Septic tanks consist of two major parts, a septic tank and a drainfield, and function as on-site sewage treatment systems.
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Plastic Tank Terms
A substance added to a polymer to increase the effectiveness, but not
the strength, of the polymer. Examples of additives include flame-retardants,
anti-static compounds, pigments and lubricants.
- The process in which atmospheric force is applied to a laminate using an elastic or woven material.
- A flaw that forms between the laminate layers or between the laminate and the gel coat film of a fiberglass tank.
- The formation of a hollow object, such as plastic tanks, by using air to expand a hollow tube, called a parison, against the internal walls of a mold.
- The process in which a mold is filled with a mixture of resin, fillers and/or fibers to form the end product, such as plastic tanks.
- A process in which layers of polymer and reinforcement materials are applied to a single or open mold, producing one finished cosmetic side.
- A polymer made up of two monomers in which each repeating unit in the chain consists of units of both monomers.
- Very thin cracks in a polymeric material caused by chemicals or other agents, such as ultraviolet radiation.
- The length of the molecular or monomeric units in a polymer chain. The degree of polymerization determines the properties of the polymer.
- The breakdown of a polymer to its original monomers or to a polymer of a lower molecular weight. Depolymerization often occurs when a polymer is exposed to chemicals or certain environmental conditions, such as high temperatures.
- A piece of equipment, usually consisting of metal, through which a substance, such as plastic, is forced in order to provide shape to the substance such as the shape used in creation of plastic tanks.
- In plastic shaping, the process of softening plastic through the application of heat and pushing the plastic through a die.
- Typically inert organic or inorganic material that is added to resins, plastics or gel coats, in order to change the properties, increase volume or decrease the cost of the end product.
- Also called GFRP (glass fiber reinforced plastic) GRP (glass reinforced plastic) or RP (reinforced plastic) it is a durable, rust-proof material that is a combination of glass and resin.
- A surface coat of colored or clear polyester resin that cosmetically enhances fiberglass laminate and provides it with good weatherability.
- The process in which fiberglass and resin layers are built up manually using hand rollers, spray equipment and brushes.
- The process of joining two pieces of plastic by blowing heated air or gas to melt the plastic pieces.
- The process of creating an object, such as a tank, by applying pressure to molten plastic in order to push the plastic into a mold. The mold is then cooled to produce the final plastic form.
- A composite formed by lamination, a process in which thermoset polymers and fiber reinforcement are layered.
- A hollow, heat-resistant container in which liquid substances can be formed into solid shapes by allowing the fluid to solidify within the mold cavity.
- The most basic polymeric unit, usually a liquid or a gas, consisting of molecules from the same organic substance.
- The ability of liquids and gases to flow through a substance. Low permeability is advantageous in plastic tank resins.
- A material whose essential ingredient is an organic substance of large molecular weight and whose end state is solid. Plastics can be shaped by flow at some stage of the manufacturing process.
- A material added to a plastic to make it more workable and flexible.
- Two or more monomers bonded together through a chemical reaction. Each polymer consists of a chain of repeating monomers.
- Water fit for human consumption. Typically dispensed form plastic water tanks.
- Petroleum or any hazardous substance stored in an industrial tank. Hazardous substances are defined in the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
- Substance added to a polymer to increase the strength of the plastic. Examples include clay, mica and glass fibers.
- A class of polymers, or plastics, chemically different to naturally occurring resins, which are sticky substances obtained from certain trees and plants. Examples of resins include polyethylene, polyurethane and acrylics.
- Also called rotomolding it is the formation of a hollow object, such as a tank, by simultaneously rotating and heating a mold filled with thermoplastic resin powder. As the mold rotates, the resin evenly coats the mold walls and is then cooled into the final form, providing seamless molding at a low manufacturing cost.
- Cracking that occurs as a result of mechanical stress. In most cases, tiny cracks caused from exposure of the plastic to chemicals or ultraviolet radiation are already present, so that when stress is applied to the plastic, the cracks enlarge and spread, creating a greater fracture.
- Category of plastics that have the potential to soften and reform when heated, and harden again during cooling. During the process, the physical makeup of the plastic does not change.
- Category of plastics that cannot be reformed upon reheating. Thermosets remain permanently hard.
- Plastic tanks system storing a regulated substance, such as petroleum, in which at least 10% of the plastic tanks, plastic tank piping and other equipment associated with the tank is located underground.