GFS tank

Description:

Enamelled steel tank, also known as Glass-Fused-to-Steel tank (GFS tank) and Glass-lined steel tank (GLS tank), contains the impermeable layers thanks to enamel protection coating. They are produced by firing at above 800°C, making the molten glass to react with the surface of the steel plate.

The enamelling process entails applying and firing one or more layers of enamel on both sides of a suitable steel substrate. This technique perfectly combines the strength and impact resistance of steel with the excellent corrosion resistance of glass.

Successful enamelling is characterised by:

• Good adhesion of enamel to steel
• Good surface appearance after firing of enamel

Manufacturing Process of Steel Plate with Enamel Coating

1. Steel Plate – Raw material preparation.
2. Laser Cutting – Cutting holes and shaping the plate.
3. Surface Treatment / Shot Blasting – Cleaning and roughening the surface for better adhesion.
4. Rolling / Arc Forming – Forming the steel plate into a cylindrical or curved shape.
5. Alkaline Cleaning – Degreasing and removing contaminants to ensure a perfectly clean surface.
6. First Enameling (Base Coat Spray) – Application of the ground coat.
7. First Firing (Base Coat Firing at 900°C) – Fusing the ground coat to the steel substrate.
8. Second Enameling (Cover Coat Spray) – Application of the top coat.
9. Second Firing at 880℃
10. Thickness Inspection (380 – 450 µm) – Quality control check for coating thickness.
11. Second Firing (Cover Coat Firing at 880°C) – Fusing the top coat to achieve the final finish.
12. Conductivity Test (1500V) – Final quality inspection to check for coating defects or pinholes.

Advantages:

• Corrosion resistance
• Impact and abrasion resistant
• Mechanical strength of the enamelled surface
• Resistance to heat and cold
• Thermal shock resistance
• Fire resistance
• Maintenance free
• Hygiene and ease of cleaning
• Wide choice of colour versions

Specifications of Glass-Fused-to-Steel Tanks

Application Area: