Customized Drinking Water Storage Tanks - China Suppliers & Factory for Glass-Fused-to-Steel Solutions
Description
Safety, cleanliness and odorlessness are essential requirements for drinking/potable water storage.
GFS tanks also named Glass-Fused-to-Steel tanks, its steel plates are fused with inorganic glass enamel layers on both the interior and exterior surfaces through high-temperature firing. It is specifically designed for the storage of drinking water, purified water, tap water, and demineralized water. Compared with stainless steel, concrete, plastic, and FRP tanks, it offers outstanding advantages.
Water Quality & Hygiene
- 1. Non-toxic material with zero leaching The enamel glaze is an inorganic silicate glass, free of heavy metals and plasticizers. Highly stable after high-temperature firing, it leaches no harmful substances even during long-term storage of cold or ambient-temperature drinking water. It meets the Hygienic Safety Evaluation Standards for Drinking Water Conveyance Equipment and Protective Materials, making it suitable for storing municipal tap water, purified drinking water, and raw water for bottled water.
- 2. No harmful substances growth & secondary pollution The inner wall is dense, smooth, free of micropores, non-permeable, and does not adsorb organic matter. Unlike concrete tanks, it does not leach calcium ions or alkaline substances; unlike ordinary plastic tanks, it does not release trace amounts of additives even after prolonged immersion.
Corrosion Resistance & Lifespan
- 1. Acid, alkali and residual chlorine resistance Tap water contains hypochlorous acid and chloride ions. Ordinary carbon steel is prone to rusting, and 304 stainless steel can suffer from pitting corrosion when exposed to high-chloride water environments over the long term. The enamel layer offers far superior resistance to chloride ion corrosion compared to stainless steel, ensuring that during long-term storage of tap water, it does not rust and does not produce rusty yellow water.
- 2. Tolerant to water quality fluctuations Whether the water is slightly acidic or slightly alkaline—such as groundwater or surface water—the inert enamel glaze layer will not undergo any chemical reaction. The water will not change color or develop off-flavors.
- 3. Ultra-long service life A qualified drinking-water-grade enamel tank can achieve a normal service life of 30 years or more. The enamel layer is resistant to aging and powdering, far outperforming FRP tanks (which are prone to aging and leakage) and plastic tanks (which typically age within 5–10 years).
Anti-scaling & Anti-algae
- 1. Extremely low adhesion, easy to clean The glass enamel surface has an extremely low friction coefficient, making it difficult for scale and microbial slime to adhere to the tank wall. In contrast, concrete tanks have rough, porous surfaces that readily trap sediment and promote biofilm growth, while stainless steel tanks tend to develop passive scale layers over prolonged use.
- 2. Inhibits the growth of algae and biofilms The smooth, non-porous inner wall lacks attachment sites for microorganisms. When combined with routine disinfection, biofilms and green algae are unlikely to form inside the tank. This significantly reduces the risk of odor and turbidity in the water, and decreases the frequency of water changes and tank cleaning.
Structural & Installation Advantages
- 1. Modular assembly on-site Panels are factory-shipped in sections, ideal for mountainous sites, residential areas, and compact waterworks with limited space—eliminating the need for integral tank transport and simplifying foundation requirements.
- 2. Leak-proof and impermeable Steel-plus-enamel dual protection, paired with food-grade rubber gaskets, delivers reliable sealing. Avoids the leakage issues of concrete tanks and prevents groundwater backflow contamination.
- 3. Adaptable insulation options External insulation can be installed, making it well-suited for outdoor drinking water storage—reducing summer bacterial growth from temperature rise and minimizing winter freezing risks.
Low Maintenance Cost
- The tank is not prone to corrosion or perforation, requiring minimal repair.
- Cleaning is simple—just a high-pressure water rinse is sufficient; no acid washing or grinding is needed.
- In the event of minor localized chipping or damage to the enamel layer, on-site repair is possible without the need for full tank replacement, making maintenance quick and convenient.
Material Characteristics of Glass-Fused-to-Steel Tanks
- Low Carbon, High Strength, High Titanium.
The steel substrate employed in the construction of glass-fused-to-steel tanks is a special high strength enamelled steel with a unique design and superior properties. Its mechanical properties, including yield strength, tensile strength, and elongation, far exceed those of conventional steel sheets.
Frequently Asked Questions (FAQ)
What are Glass-Fused-to-Steel (GFS) tanks?
GFS tanks are specialized storage structures where steel plates are fused with inorganic glass enamel layers on both interior and exterior surfaces through high-temperature firing. This combines the strength of steel with the chemical and physical resistance of glass.
Why are GFS tanks safer for drinking water compared to concrete or plastic?
The inorganic silicate glass enamel layer is non-toxic, free of heavy metals and plasticizers, and does not leach harmful substances. Its dense, non-porous structure prevents secondary pollution, organic adsorption, and calcium or chemical leaching commonly found in concrete and plastic tanks.
How do GFS tanks perform against chlorine and corrosion?
The enamel layer offers superior resistance to chloride ions and residual chlorine found in tap water. Unlike stainless steel, which can suffer from pitting corrosion, or carbon steel which rusts, GFS tanks do not rust and prevent rusty yellow water.
Do GFS tanks require frequent cleaning to prevent algae?
No. The smooth glass inner wall has an extremely low friction coefficient, which inhibits the attachment of scale, biofilms, and green algae. This minimizes the risk of odors and turbidity, significantly reducing the frequency of water changes and cleaning.
How are GFS tanks installed and maintained?
GFS tanks are modularly assembled on-site using factory-shipped panels, which reduces transport costs and simplifies installation. Maintenance is highly cost-effective, requiring only a simple high-pressure water rinse, and localized damage can be repaired on-site without replacing the entire tank.
What is the expected service life of a GFS tank?
A qualified drinking-water-grade GFS tank can achieve a normal service life of 30 years or more, as the enamel layer resists aging and powdering far better than FRP or plastic alternatives.