How to Choose GFS Tanks?

28 Apr.,2025

 

What to Consider Before Choosing a Concrete Tank or Glass Fused ...

When considering the type of material to construct your above ground storage tank with, it is important to consider the various factors that will impact your decision.

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Durability and Longevity of Concrete vs. Glass Fused Steel Tanks

One main complaint of concrete tanks is cracking, leaking, and the resulting maintenance and costs required to correct these problems.

Concrete is not flexible, and is subject to expansion and contraction – caused by changing temperatures or seismic activity – which overtime causes cracks and leaking. Cracks in concrete tanks can be repaired, but in some instances an expensive plastic liner is required. An untreated crack in concrete can lead to the growth of bacteria on the porous concrete which can compromise the sanitation of your tank.

The most significant advantage for choosing a Glass Fused Steel Tank over a concrete tank is the durability. Steel will flex but not crack like concrete tanks often will. A properly maintained above ground steel panel tank can last well over 100 years, whereas a concrete tank is estimated to have a maximum lifespan of 50 years.

Cost of Concrete Tanks

Historically, concrete tanks have been an inexpensive alternative to Glass Fused Steel Tanks with lower initial investment cost. However, it is critical to think beyond the initial investment cost and consider the cost over the life cycle of the tank.

Then, there is the cost of the water that is lost, since concrete tanks are allowed and expected to leak. Treated, sanitised water is expensive and can adversely affect the surroundings of the tank through erosion and the killing of micro-organisms in the environment.

The associated maintenance expenses, as well as the potential loss in revenue and usage from having your tank out of service, will add up. Since Glass Fused Steel Tanks have a longer life cycle, the overall cost spread across the life of the tank makes a Glass Fused Steel Tank the most attractive option, and is typically less expensive when compared to a concrete tank.

Safety and Environmental Impact

Safety is the most important factor to consider with your tank. If your industry requires you to have confidence in the sanitation level of the liquid in your tank, then steel is the way to go.

Due to the porous conditions of concrete and its inevitable cracking, there is the potential for mould and bacterial growth, and the leaching of calcium found in the concrete.

Flexibility and Customisation

Glass Fused Steel Tanks are custom designed to meet your specific needs. This allows you the ability to choose the exact dimension, style of roof and floor, and ability to add inlets, outlets, manways, roof hatches, and vents. If your needs for the tank change, it is easy to adapt and change components of the tank.

Making these adjustments in a concrete tank is difficult and very costly. A poured in place concrete tank is impossible to move. On the contrary, due to the flexibility of a Glass Fused Steel Tank, relocating the tank can be easily performed.

GFS Tanks with FRP Roof

Build the Right Tank

Wansheng strongly believes in building Glass Fused Steel Tanks. Deciding to build your tank out of steel will be a decision you will not regret. Wansheng offers a range of bolted steel panel tanks from our Glass Fused to Steel coatings to our fusion bonded epoxy coatings.

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We’d love to keep you updated of the projects we’re working on and new developments to the products and services we provide. Contact us for more information.

Glass Fused to Steel Tanks Pros and Cons

The Pros and Cons of Tanks Made of Glass Fused to Steel

In the evolving landscape of sustainable energy solutions, biogas digesters have emerged as a pivotal technology for converting organic waste into renewable energy. Central to the efficiency and durability of these systems are the tanks that house the digestion process.

Among the various options available, Glass Fused to Steel (GFS) tanks and Glass Fused Bolted Steel (GFBS) tanks are gaining attention for their unique combination of materials. This comprehensive guide explores the advantages and disadvantages of GFS and GFBS tanks, providing valuable insights to help you make informed decisions for your biogas projects.

Understanding Glass Fused to Steel Tanks

Glass Fused to Steel tanks are engineered by fusing glass to steel surfaces, creating a robust and corrosion-resistant barrier. This fusion process enhances the durability of the tanks, making them suitable for various industrial applications, including biogas digestion. The fusion not only improves the structural integrity of the tanks but also ensures that they can withstand the harsh environments typically associated with biogas production.

Advantages of Glass Fused to Steel Tanks

1. Enhanced Corrosion Resistance

One of the primary benefits of GFS tanks is their superior corrosion resistance. Biogas production involves the breakdown of organic materials, which can release corrosive substances like hydrogen sulfide and other acids. The glass layer acts as a protective barrier, preventing these corrosive agents from damaging the steel structure. This significantly extends the lifespan of the tanks, reducing maintenance costs and downtime.

2. High Durability and Strength

The fusion of glass fused to steel results in a tank that combines the strength of steel with the resilience of glass. This makes GFS tanks highly durable, and capable of withstanding both internal pressures from gas production and external physical impacts. The robust construction ensures that the tanks remain intact and functional over extended periods, even in demanding operational conditions.

3. Improved Hygiene and Cleanability

In biogas digester applications, maintaining hygiene is crucial to prevent contamination and ensure the efficiency of the digestion process. The glass surface is non-porous and smooth, making it easy to clean and sanitize. This reduces the risk of microbial contamination and facilitates regular maintenance, thereby enhancing the overall performance of the biogas system.

4. Aesthetic Appeal

While functionality is paramount, the aesthetic aspect of industrial equipment should not be overlooked. GFS tanks offer a sleek and modern appearance, thanks to the glass's smooth finish. This can be particularly beneficial for facilities where the equipment is visible to clients or visitors, contributing to a professional and high-quality image.

5. Chemical Resistance

Glass fused to steel tanks exhibit excellent resistance to a wide range of chemicals commonly encountered in biogas production, including acids and alkalis. This chemical resilience ensures that the tanks maintain their integrity and performance even when exposed to aggressive chemical environments, providing a reliable solution for long-term biogas operations.

Disadvantages of Glass Fused to Steel Tanks

1. Higher Initial Cost

The advanced manufacturing process involved in fusing glass to steel results in a higher initial cost compared to traditional steel tanks. This investment might be a consideration for smaller operations with limited budgets. However, the long-term benefits, such as reduced maintenance and extended lifespan, can offset the higher upfront expenses.

2. Specialized Manufacturing Requirements

Producing GFS tanks requires specialized equipment and expertise to ensure the proper fusion of glass and steel. This can limit the availability of suppliers and may lead to longer lead times for manufacturing and delivery. Ensuring that you work with experienced manufacturers is essential to achieving the desired quality and performance.

3. Potential for Glass Damage

While the glass layer provides significant protection, it is not impervious to all forms of damage. Physical impacts or stresses beyond the design specifications can potentially crack or chip the glass, compromising the tank's integrity. Proper handling and installation are crucial to minimize the risk of damage during transportation and setup.

4. Thermal Expansion Considerations

Thermal expansion differences between glass and steel can pose challenges in certain environments. Fluctuations in temperature may cause the materials to expand or contract at different rates, potentially leading to stress points or micro-cracks over time. Addressing these considerations in the design phase is vital to ensuring the longevity of GFS tanks.

Advantages of GF Bolted Steel Tanks

Glass Fused Bolted Steel (GFBS) tanks incorporate bolted connections, offering additional flexibility and ease of maintenance. These tanks combine the benefits of glass fusion with the practicality of bolted steel construction, making them a popular choice for various industrial applications.

1. Ease of Maintenance and Repair

The bolted connections in GFBS tanks allow for easier disassembly and reassembly, facilitating maintenance and repairs. In the event of glass damage or other issues, individual sections can be replaced without the need for complete tank replacement. This modularity enhances the overall maintainability of the tanks and reduces downtime.

2. Versatile Installation Options

GFBS tanks offer greater versatility in installation due to their bolted design. They can be assembled in different configurations to accommodate varying space requirements and operational needs. This adaptability makes them suitable for a wide range of biogas digestion setups, from small-scale installations to large industrial systems.

3. Improved Structural Flexibility

The bolted connections provide a level of structural flexibility that welded tanks may lack. This can be advantageous in environments where tanks are subject to shifting loads or dynamic forces. The ability to adjust and reinforce connections as needed contributes to the overall resilience of the system.

4. Enhanced Customization

Bolted steel tanks allow for more customization options compared to monolithic welded tanks. Manufacturers can tailor the design to meet specific client requirements, including size, shape, and additional features. This customization ensures that the tanks align perfectly with the operational needs of the biogas facility.

Disadvantages of GF Bolted Steel Tanks

1. Increased Potential for Leaks

While bolted connections offer flexibility, they also introduce potential points of vulnerability where leaks can occur. Ensuring that all connections are properly sealed and maintained is essential to prevent gas or liquid leaks, which can impact the efficiency and safety of the biogas system.

2. Complexity in Construction

GFBS tanks require precise engineering and construction to ensure that the bolted connections remain secure under operational stresses. This complexity can lead to longer construction times and necessitate skilled labour, potentially increasing the overall cost and timeline of the project.

3. Weight Considerations

The combination of glass and steel, along with the additional hardware required for bolted connections, can result in heavier tanks compared to some other materials. This increased weight may require more robust support structures and can impact transportation and installation processes.

4. Maintenance of Bolted Connections

Bolted connections require regular inspection and maintenance to ensure their integrity. Over time, bolts can loosen due to vibrations or thermal cycling, necessitating periodic tightening or replacement. Failure to maintain these connections can compromise the tank's performance and safety.

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Comparative Analysis: GFS vs. GF Bolted Steel Tanks

When deciding between GFS and GFBS tanks for biogas digestion, it's essential to consider the specific needs and constraints of your project. Here's a comparative overview to aid in your decision-making process:

FeatureGlass Fused to Steel (GFS)Glass Fused Bolted Steel (GFBS)Corrosion ResistanceExcellentExcellentDurabilityHighHighMaintenance EaseModerateHighInitial CostHigher than traditional coatingsHigher than traditional coatingsCustomizationLimitedHighPotential for LeaksLowHigher due to bolted connectionsInstallation FlexibilityLowHighRepairabilityLowerHigher due to modular design

Factors to Consider When Choosing Between GFS and GFBS Tanks

1. Project Scale and Budget

For larger projects with higher budgets, the added benefits of GFBS tanks, such as ease of maintenance and customization, may provide significant value. Smaller operations might prefer the straightforward durability of GFS tanks if initial costs are a primary concern.

2. Maintenance Capabilities

Assess your ability to perform regular maintenance and inspections. GFBS tanks require more frequent attention to bolted connections, which may necessitate trained personnel and a structured maintenance schedule.

3. Environmental Conditions

Consider the environmental factors where the tanks will be installed. If your facility experiences significant temperature fluctuations or dynamic loads, the structural flexibility of GFBS tanks may offer better performance.

4. Longevity and Lifecycle Costs

Evaluate the long-term costs associated with each tank type, including maintenance, potential repairs, and replacement. GFS tanks, with their robust corrosion resistance, may offer lower lifecycle costs despite higher initial investments.

Installation Best Practices

Proper installation is crucial to maximizing the benefits of Glass Fused to Steel and GFBS tanks. Here are some best practices to ensure optimal performance and longevity:

  1. Professional Assessment: Conduct a thorough assessment of your site and operational requirements with the help of experienced professionals to determine the most suitable tank type.
  • Quality Manufacturing: Partner with reputable manufacturers who have proven expertise in producing high-quality GFS and GFBS tanks. Ensure that they adhere to industry standards and quality control measures.
  • Secure Foundations: Install tanks on stable and level foundations to prevent undue stress and movement. Proper support structures are essential to maintain structural integrity.
  • Environmental Controls: Implement measures to control temperature and exposure to harsh chemicals, further protecting the tank's glass and steel components.
  • Regular Inspections: Establish a routine inspection schedule to monitor the condition of the tanks, focusing on potential signs of wear, corrosion, or damage to the glass layer.

Case Studies: Successful Implementations

Case Study 1: Agricultural Biogas Plant

A medium-sized agricultural biogas plant opted for Glass Fused Bolted Steel tanks due to their ease of maintenance and customization options. The facility required tanks of varying sizes to accommodate different stages of the digestion process. The modular design of GFBS tanks allowed for seamless expansion as the plant scaled up its operations. Regular maintenance procedures ensured that the bolted connections remained secure, resulting in consistent biogas production and minimal downtime.

Case Study 2: Industrial Waste Management Facility

An industrial waste management facility chose Glass Fused to Steel tanks to handle high volumes of corrosive waste. The exceptional corrosion resistance of GFS tanks prevented degradation of the steel components, even when exposed to aggressive acids and hydrogen sulfide. The durable construction reduced the need for frequent replacements, leading to significant cost savings over the tank's lifecycle. Additionally, the smooth glass surfaces facilitated easy cleaning, maintaining high hygiene standards.

Future Trends in Glass-Fused Tank Technology

The field of glass-fused tank technology is continually advancing, with ongoing research aimed at enhancing performance and reducing costs. Future developments may include:

  • Advanced Glass Compositions: Innovations in glass formulations could further improve corrosion resistance and durability, expanding the applicability of GFS tanks in more demanding environments.
  • Smart Monitoring Systems: Integrating sensors and IoT technology into tanks for real-time monitoring of structural integrity, gas production, and environmental conditions could optimize maintenance schedules and enhance operational efficiency.
  • Sustainable Manufacturing Practices: Efforts to reduce the environmental footprint of glass fusion processes through the use of recycled materials and energy-efficient manufacturing techniques are gaining momentum.

Quality Assurance and Standards for Glass-Fused-To-Steel Bolted Tanks

Engineers and industry professionals all over the world are opting for glass-fused-to-steel tanks. These defect-resistant storage tanks will give decades of trouble-free operation in difficult conditions. But, tanks glass fused do need to be built using this unique glass-fused-to-steel technology and controlled for the highest quality by ISO certification.

When well manufactured, porcelain-enamelled tanks never need recoating.

While steel, aluminium, cast iron, copper, and brass can all be used as glass coating substrates, porcelain enamelled tanks are made of steel. The type of steel used is usually determined by the tank's size requirements. The larger tanks may need a tougher grade of steel.

Delivering Quality Glass-Fused-to-Steel Tanks

But only purchase from manufacturers who offer ISO certification, which entails more than 16 standard examinations before units are approved for sale. Glass Fused to Steel tanks are ideal for the containment of potable, municipal, agricultural, and industrial fluids because of their low maintenance requirements and inherent resistance to contamination.

Erection of Bolted Steel Panels and the Construction of a Base Slab

The top GFS Tank suppliers and erectors provide a full service, from foundation installation through sidewall erection and roof construction.

When compared to in-situ cast concrete options, tanks are typically constructed in a week or two, including roofs or domes, saving the owner significant money on onsite labour expenditures.

The Ultimate Flat Pack!

Tanks are supplied flat-packed to the construction site for simple transport and handling.

The main components of the kit are the glass-fused-to-steel panels, which are ready to bolt together and include any custom cut-outs for nozzles, manways, and other accessories as needed.

Building crews educated and certified in the erection process are provided by the leading firms, ensuring the same level of quality control in the field as in the factory. The panels are bolted together and sealed with a high-performance seal that is appropriate for the substance being stored.

Bolt Head Protection

To protect the bolt heads from corrosion in the process environment, they are all plastic-capped.

The bolt head seals the shank and protects it from contact with process fluids by squeezing mastic between the panels.

For the building of these tanks, only properly trained erectors should be used. This isn't something that can be accomplished efficiently with general on-site labour.

Making the Right Choice for Your Biogas Project

Selecting the appropriate tank type is a critical decision that impacts the efficiency, safety, and cost-effectiveness of your biogas project. By carefully evaluating the pros and cons of Glass Fused to Steel and Glass Fused Bolted Steel tanks, you can choose the solution that best aligns with your operational needs and long-term goals.

Contact Us Today

Ready to enhance your biogas digestion system with top-of-the-line glass-fused tanks? Our expert team is here to guide you through the selection, installation, and maintenance process. Contact us today to discuss your project requirements and discover how our Glass Fused to Steel and Glass Fused Bolted Steel tanks can optimize your renewable energy operations.

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Learn more about our comprehensive range of biogas solutions, including tank installation, maintenance packages, and customized system designs. Visit our services page or reach out to our specialists for personalized support.

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Bio-Energy GFS Tanks Conclusion

Liquid storage tanks are available in a variety of forms and capacities ranging from hundreds to millions of gallons to fulfil the most demanding storage requirements. GFS tanks or tanks glass fused are the most popular single tank type.

Many biogas plant experts do say that Glass Fused to Steel Tanks are a good choice for CSTRs and many other “wet process” anaerobic digestion process operations.

In fact, no other tank can compete with this one when it comes to holding aggressive liquids like digestate or wastewater, since the tank covering is resistant to chemical attacks that would otherwise destroy and ruin other tanks.

While both options come with their own set of advantages and challenges, understanding their unique characteristics ensures that you make an informed choice tailored to your specific needs.

Embrace the future of sustainable energy with glass-fused tank technology and propel your biogas projects to new heights of success.

[First published on 20 September . Updated March .]