Glass Fused to Steel Tank: Evaluating Suppliers and Specs
Created on 09.30
Glass Fused to Steel Tank: Evaluating Suppliers and Specs
What Is a Glass Fused to Steel Tank?
A glass fused to steel tank combines the structural strength of steel with a vitreous enamel interior fused at 820–930°C, producing an inert, corrosion-resistant composite. For buyers, the key is verifying the supplier's enameling control, standards compliance, and verified project references before purchase.
How Does It Work?
Evaluate the supplier's furnace and enameling process, the holiday-test and adhesion evidence per panel, the applicable standards (ISO 28765, AWWA D103-09, NSF/ANSI 61 for potable), and comparable completed projects. Bolted GFS tanks then deliver with factory-controlled quality and fast erection.
Key Types, Components, and Features
Bolted GFS tank. Standard water/WW/biogas build.
GFS digester. Gas-tight for anaerobic duty.
Key components: enameled panel, gasket, fastener, roof, foundation, nozzles.
Applications
· - Drinking and process water - Wastewater and leachate - Anaerobic digestion and biogas - Fire-protection reserves
Technical Considerations
Materials. Steel + vitreous enamel.
Capacity. 20–60,000 m³; modular.
Corrosion. Inert enamel barrier.
Standards. ISO 28765, AWWA D103-09, NSF/ANSI 61.
Installation / maintenance. Handle panels; minimal recoat.
Service life. 30+ years documented.
Project Case Study
Case Study — Malaysia — Drinking water (20380m³, 4, completed 2025-10)
Project Background
Project type: Potable water storage. Industry: Municipal water supply. Location: Malaysia. Application: Drinking water storage / treatment. Objective: provide a reliable, standards-referenced above-ground containment with controlled quality and a practical erection schedule.
Project Requirements
- Storage capacity: 20380m³
- Quantity: 4
- Tank size: φ17.58×21 m(H) 4 unit
- Storage medium: Drinking water
- Applicable standards: NSF/ANSI 61, ISO 28765, AWWA D103-09
- Site limitation: controlled quality, practical schedule
Technical Challenges
The duty required a large, code-compliant volume with quality that did not depend on variable field welding. A factory-controlled bolted system reduces on-site variables in coating and joint quality.
Engineering / Product Solution
- Tank type: Glass-Fused-to-Steel (GFS) bolted tank
- Material: low-carbon steel panels with vitreous enamel coating fused at 820–930°C
- Roof: Aluminum dome roof
- Structural configuration: bolted panel shell on a concrete ring beam with gasketed joints
- Foundation: engineered concrete ring beam with anchor bolts
- Standards applied: NSF/ANSI 61, ISO 28765, AWWA D103-09
Project Implementation
Panels were manufactured and (for GFS) shop-enameled under factory quality control, then shipped for bolted erection on site. Gasketed joints and structural fasteners were installed to procedure and inspected per the project quality plan. (Specific commissioning steps beyond the supplied record are not stated.)
Project Outcome
- Status: Completed (2025-10)
- Capacity achieved: 20380m³ across 4
- Outcome: above-ground storage delivered as a bolted, standards-referenced system
Project Information | Details |
Project Type | Potable water storage |
Location | Malaysia |
Industry | Municipal water supply |
Application | Drinking water storage / treatment |
Product | Glass-Fused-to-Steel (GFS) bolted tank |
Capacity | 20380m³ |
Quantity | 4 |
Material | Glass-Fused-to-Steel (GFS) |
Standards | NSF/ANSI 61, ISO 28765, AWWA D103-09 |
Project Status | Completed (2025-10) |
Additional Reference — Costa Rica — Drinking water (12650m³, 1, completed 2025-06)
Project Background
Project type: Potable water storage. Industry: Municipal water supply. Location: Costa Rica. Application: Drinking water storage / treatment. Objective: provide a reliable, standards-referenced above-ground containment with controlled quality and a practical erection schedule.
Project Requirements
- Storage capacity: 12650m³
- Quantity: 1
- Tank size: φ40.49×9.6 m(H) 1 unit
- Storage medium: Drinking water
- Applicable standards: NSF/ANSI 61, ISO 28765, AWWA D103-09
- Site limitation: controlled quality, practical schedule
Technical Challenges
The duty required a large, code-compliant volume with quality that did not depend on variable field welding. A factory-controlled bolted system reduces on-site variables in coating and joint quality.
Engineering / Product Solution
- Tank type: Glass-Fused-to-Steel (GFS) bolted tank
- Material: low-carbon steel panels with vitreous enamel coating fused at 820–930°C
- Roof: Aluminum dome roof
- Structural configuration: bolted panel shell on a concrete ring beam with gasketed joints
- Foundation: engineered concrete ring beam with anchor bolts
- Standards applied: NSF/ANSI 61, ISO 28765, AWWA D103-09
Project Implementation
Panels were manufactured and (for GFS) shop-enameled under factory quality control, then shipped for bolted erection on site. Gasketed joints and structural fasteners were installed to procedure and inspected per the project quality plan. (Specific commissioning steps beyond the supplied record are not stated.)
Project Outcome
- Status: Completed (2025-06)
- Capacity achieved: 12650m³ across 1
- Outcome: above-ground storage delivered as a bolted, standards-referenced system
Project Information | Details |
Project Type | Potable water storage |
Location | Costa Rica |
Industry | Municipal water supply |
Application | Drinking water storage / treatment |
Product | Glass-Fused-to-Steel (GFS) bolted tank |
Capacity | 12650m³ |
Quantity | 1 |
Material | Glass-Fused-to-Steel (GFS) |
Standards | NSF/ANSI 61, ISO 28765, AWWA D103-09 |
Project Status | Completed (2025-06) |
Advantages and Limitations
Advantages
· - Inert interior — smooth, non-porous - Corrosion resistant — uniform enamel - Shop control — consistent firing - Fast, relocatable — bolted panels
Limitations
· - Chipping — panels handled with care - Repair — compatible enamel procedure - Temperature — below steel's high-heat ceiling - Not universal — some chemicals need FRP
Comparison of Relevant Tank Types
Criterion | Glass-Fused-to-Steel | Epoxy Coated | Stainless | Welded Steel |
Inert | Yes (enamel) | No (film) | Yes | Coated |
Capacity | 20–60,000 m³ | Similar | Small–med | Very large |
Potable | NSF/ANSI 61 | Cert-dep. | Yes | Lined |
Best for | Water, WW, biogas | Mild chem | Hygienic/aggr | Fuel/process |
How to Select the Right Solution
· - Supplier control — own enameling line and furnace - Evidence — holiday test (900–1500 V), adhesion data - Standards — ISO 28765 / AWWA D103-09 / NSF 61 - References — comparable completed projects - Deliverables — calculation, foundation input, BOM - Lifecycle — spare parts, inspection interval
Glass Fused To Steel Tank selection should follow the stored medium, capacity, standards, and site constraints. Verified project experience and documented quality (coating, holiday-test, and adhesion records) matter more than marketing claims when specifying a durable, compliant installation.
For specification support, Center Enamel provides referenced Glass Fused to Steel Tank installations, holiday-test and adhesion evidence, and budgetary quotations.
Frequently Asked Questions (FAQ)
What is a glass fused to steel tank?
It is a tank built from steel panels with a vitreous enamel interior fused at 820–930°C into an inert, corrosion-resistant composite, bolted together with gasketed joints — commonly called a GFS tank.
Center Enamel can confirm applicable approvals and share references for comparable Glass Fused to Steel Tank installations.
What should I check when buying a GFS tank?
Verify the supplier's enameling control and furnace, holiday-test (900–1500 V) and adhesion evidence per panel, standards compliance (ISO 28765, AWWA D103-09, NSF/ANSI 61 for potable), and comparable completed references.
Center Enamel supports Glass Fused to Steel Tank with factory enameling, third-party testing, and global project delivery.
How does GFS compare with epoxy coated steel?
GFS provides an inert fired-enamel barrier that is more durable and potable-approved for aggressive-water duty; epoxy is a versatile lower-cost film with a narrower inertness envelope.
What standards apply to GFS tanks?
ISO 28765 (design), AWWA D103-09 (bolted), and NSF/ANSI 61 / WRAS / ACS for potable contact, plus ISO 9001 / 45001 and EN 1090 for manufacturing.
How large and how long does a GFS tank last?
Capacities commonly 20–60,000 m³, paralleled for larger duty; documented service life of 30+ years with maintained quality records.
Send your specification; we will provide a GFS tank proposal with enameling evidence, standards compliance, and verified references.
Contact Center Enamel for a specification review and budgetary quotation on your Glass Fused to Steel Tank project.
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