Glass Fused To Steel Bolted Storage Tanks &#; Never Need Painting
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Glass-fused-to-steel (porcelain enamel) is a single source strong, integrated porcelain enamel and steel material fused together at over ° F, creating a hard inert, inorganic coating that NEVER needs painting. CST&#;s glass-fused-to-steel is the premium technology in the tank market. The interior of all glass-fused-to-steel tanks feature VITRIUM&#; coating technology enhanced with titanium dioxide (Ti02) for the toughest glass available.
CST&#;s VITRIUM coating is the world&#;s leading glass-fused-to-steel process for bolted storage tanks and has been field proven for more than 69 years. Along with VITRIUM coating, CST now offers EDGECOAT® II, the continuous innovative EDGECOAT technology and the ONLY process in the world that provides optimum glass encapsulation on all (4) sides of the sheet edges. VITRIUM coating features and benefits include:
EDGECOAT II is a result of CST&#;s commitment to an ongoing product development and improvement program. This continuous innovative EDGECOAT technology is the ONLY process in the world that provides optimum glass encapsulation on all (4) four sides of the sheet edges. CST took the best EDGECOAT technology in the world and made it better with EDGECOAT II.
Following Porcelain Enameling Institute guidelines (PEI-101), EDGECOAT II sheets are mechanically rounded to specific radii that provides maximum glass adhesion to steel. The combination delivers the maximum corrosion resistance of VITRIUM glass coating with the greatest protection on every sheet.
Download Edgecoat II Technical Data Sheet
VITRIUM is our proprietary titanium Dioxide (TiO2) glassing process applied in a 3-coat, 1-fire (3c1f) process procedure. VITRIUM coating is also produced in a 3-coat, 2-fire (3c2f) process primarily when special colors are requested or thicker layers of glass are required.
The CST proprietary VITRIUM glass-fused-to-steel process provides:
The combination of glass quality and glass thickness provide the assurance that over 69 years of experience and over 100,000 structures successfully installed around the world will continue with each and every new structure installed.
Titanium Dioxide (TiO2)
In CST, formerly Engineered Storage Products, launched an R&D project to develop a process for the direct application of our proprietary Titanium Dioxide (TiO2) Glass. The result is a totally new, patented &#;3-coat, 1-fire&#; (3c1f) process for applying TiO2 Glass.
TiO2 is a very common ingredient used by many coating manufacturers for various reasons:
As a result of using higher amounts of TiO2 in the final white layer, a unique visual marker on the glass known as &#;VITRIUM threading&#; becomes apparent. This is caused by thicker areas of the top white layer interspersed with thinner areas allowing the underlying bluecoat to show through opaquely. This immediately identifies the coating as VITRIUM.
Manufacturing Excellence
CST&#;s DeKalb facility is ISO : quality system certified. Engineers design tanks for a wide range of standards including AWWA D103 Standard for Bolted Steel Water Storage Tanks, AISC, FM codes and NFPA Standard 22. Additionally, glass coatings meet ANSI/NSF Standard 61 requirements for indirect additives, making AQUASTORE®, HARVESTORE® and SLURRYSTORE® tanks ideal for liquid, feed, manure storage and digesters processes. Most importantly, extreme pride is taken in craftsmanship for a tank that endures the test of time.
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From the automated manufacturing processes through the stage-by-stage inspection and even down to careful inspection of the glass. Our glass-fused-to-steel quality is the best in the industry. The best proof of the precision of CST&#;s manufacturing procedures can be seen in the thousands of tank installations around the world.
Glass-Fused-To-Steel Process
Glass-fused-to-steel is the premium technology in the tank market. The factory-applied silica glass coating on AQUASTORE, HARVESTORE, SLURRYSTORE and NUTRISTORE tanks forms a hard, inert barrier for both the interior and exterior tank surfaces to guard against weather and corrosion. Glass-fused-to-steel is impermeable to liquids and vapors, controls undercutting caused by corrosion and offers excellent impact and abrasion resistance. The color won&#;t fade or chalk and most graffiti can easily be removed. It NEVER needs painting!
VITRIUM Coating Glass Finish
New process technology has resulted in the development of CST&#;s newest glass innovation &#; VITRIUM coating. This coating combines the outstanding chemical and physical resistant properties of Titanium Dioxide (TiO2) saturated glass with a highly engineered ultra-fine glass structure surface to create a high-performance glass-fused-to-steel technology. VITRIUM coating features and benefits include:
Color Options
AQUASTORE glass coatings are available in standard cobalt blue or four other premium exterior colors. Forest green, sky blue, desert tan or white premium colors are available at an additional cost. Inquire for custom colors.
History of Glass-Fused-To-Steel
CST (formerly A.O. Smith) first discovered the methodology of controlling corrosion by fusing glass to steel in the s. The technology was initially used in the brewing and hot water heater industries. While other uses for glass-fused-to-steel were explored, the first glass-fused-to-steel tank went into service in as a HARVESTORE silo. This agricultural use to store feed while retaining quality has been widely used for almost 69 years.
In the s, our Municipal and Industrial Division was formed and we subsequently launched AQUASTORE tanks for water, wastewater and other industrial liquid uses. Since , more than 100,000 AQUASTORE, HARVESTORE, SLURRYSTORE and NUSTRISTORE glass-fused-to-steel tanks have been installed in over 70 countries around the world.
Southeastern Tank | February 18,
The wastewater industry is full of general rules of thumb and best practices, often ignored within these is selecting the right storage tank with the right coating for the application. As the term &#;wastewater&#; represents a broad cross-section of constituents, waste stream makeup, compounds, origin and strength it is no wonder that the general rule of thumb is just that, too general. Wastewater streams vary widely, especially in the industrial sector, as do the options effective in their treatment. Just as careful selection of the right process and technology is a necessity to achieve successful (i.e., permit-driven) treatment results, so too is the tank in which the initial storage and eventual treatment process takes place.
The success or failure of any tank is largely dependent on its coating. While there are generally two main albeit different types of steel storage tanks on the market today, welded steel and bolted steel, they are relational in they both rely on a steel substrate for structural integrity (steel sheets welded together, steel sheets bolted together) and a coating system (field-applied paint, factory applied glass or epoxy) in order to effectively store liquid.
The storage and treatment of wastewater, in all of its variations and sources is some of the hardest liquid to store. The components that make up strong waste streams often produce heavy corrosion-causing conditions that challenge storage tanks of all types. The &#;right tank&#; in the wrong application carries monetary and operational consequences, commonly referred to as time & money.
Welded steel tanks are the oldest of all storage tank designs, which includes ground storage tanks commonly used for wastewater treatment. The design of a welded steel tank includes the application of a field-applied coating, the success or failure of the coating is largely reliant on two things; the applicability of the coating (&#;paint&#;) being used and most importantly the proper application of the coating. Even the best coating system will fail if not properly applied, field conditions often change quickly allowing environmental conditions to affect the application process. The true weakness in field-applied coating lies in the fact that they are carbon-based systems, meaning they can and will chalk, fade and eventually fail due to corrosion. Additionally, while there are various types of custom or heavy-duty coating systems available the costs associated with coatings themselves and the stringent nature of their application often make them too costly to consider.
Bolted, powder-coated-epoxy-steel tanks are some of the most widely used in wastewater storage and treatment operations. Their low initial cost compared to field welded and bolted, glass-fused-to-steel tanks often give them an advantage. Additionally, bolted, powder-coated-epoxy-steel tanks are quick to erect and can be built on small sites with limited space around the tank in which to work. This is due to modular building techniques unique to bolted tank construction. As with all coated steel tanks, the bolted-powder-coated-epoxy-steel tank relies on its coating system to provide the protection against the harsh environment found in wastewater. While the powder-coat epoxy is a carbon-based, the advantage bolted-powder-coated-epoxy steel tanks have is in the actual application of the coating; bolted-powder-coated-epoxy-steel tanks are factory-coated, this allows ever-changing environmental factors that adversely affect field-applied coatings to be eliminated. The coating process is fully automated, using state-of-the-art robotic applicators and the latest in steel sheet preparation ensure the epoxy coating is evenly applied, in precise thicknesses and properly cured in order to achieve a robust coating system. This results in a ready-to-build product that is fully coated and ready for service once it is delivered to the site.
Bolted, glass-fused-to-steel tanks have become a viable and sought after technology for wastewater storage and treatment. Although higher in initial cost compared to bolted, powder-coated-epoxy-steel tanks, it is a truly unique product that uses a factory applied glass coating (porcelain enamel) to protect the steel against corrosion. The glass is &#;fused&#; to the steel, this &#;fusion&#; process is only achieved at > 1,500° F and produces an inert coating that is mechanically and chemically bonded to the steel. The result of this &#;fusion&#; is a coating system that is impermeable to most liquids, eliminates undercutting caused by corrosion, will not chalk, fade or rust and will never need recoating. Glass-fused-to-steel is more than twice as hard as any field-applied paint/coating system and has a bond rating 12.5 times stronger than factory-applied, powder-coat. Similar to the powder-coating process used on bolted epoxy tanks, the application of the glass coating is fully automated, using robotic spray guns and applicators that ensure consistent, uniform liquid glass coating is applied to every sheet. Glass-fused-to-steel tanks are erected using modular construction methods that allow the tank to be constructed on small sites with limited work space. This form of specialized construction utilizes lifting jacks, designed specifically for Aquastore® glass-fused-to-steel tanks provides safe, OSHA-friendly construction with quick and efficient erection time.
The investment in waste treatment and storage is a necessity, driven by EPA-mandated regulations and enforced by local municipal and utility agencies that serve the public trust. This investment in is seldom a small one, requiring capital expenditure and operational impact that constantly move the bottom-line, profitability needle. The economic comparison for selecting the right tank, the right coating, the right technology for waste treatment and storage can be summed up like this;
The reality in any and all of these tanks is they will require significant investment; time, money, resources, operational impact and will become another piece of the plant&#;s infrastructure. They also become another line item on the maintenance list that will affect the company&#;s bottom line in some capacity. The money will get spent on capital investment in the tank itself and over the life of the tank in scheduled/routine maintenance costs. The decision on where and how to spend that money will be affected by the technology chosen &#; a company will spend less in capital costs on a bolted, powder-coated-epoxy-steel tank but will eclipse that initial cost with maintenance (repair/recoating and eventual replacement) costs. Conversely, a company will spend more in capital costs on a bolted, glass-fused-to-steel tank but will achieve overall cost reduction in maintenance (minimal repair, no recoating or replacement) savings over the life of the tank.
The improvement in the plant&#;s waste treatment process will provide peace of mind for regulatory compliance and a good name in the community, the storage tank used in that process is an integral part &#; both economically and operationally. Let Southeastern Tank, Inc. help you select the right tank with the right coating with the right technology for your waste treatment application.
Contact us to discuss your requirements of glass fused bolted steel tanks. Our experienced sales team can help you identify the options that best suit your needs.