High Corrosion Resistance GFS Tanks for Biogas Digesters - Leading China Suppliers & Factory
Description
The core requirement for anaerobic digester tanks is corrosion resistance. The internal environment of a biogas digester is highly acidic (pH 3–11) and rich in corrosive gases such as hydrogen sulfide. GFS (Glass-Fused-to-Steel) is an ideal material for biogas digester tanks.
The Glass Fused to Steel (GFS) tank is a kind of bolted storage tank made from two materials: glass and steel. High-strength TRS (titanium-rich steel) plates and enamels are perfectly fused at high temperatures to form a highly inert inorganic glaze layer. This coating system has excellent anti-corrosion properties and is the best choice for tank construction.
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.
Features of Glass Fused to Steel Tanks
- ⚡ Fast installation and short construction period
- 🛡️ Excellent anti-corrosion properties
- 🏗️ Low construction environment requirements
- 🌡️ Strong temperature adaptability
- 🔗 Wide range of applications, seamlessly integrated to form assembled reactors
- ✨ Aesthetically pleasing appearance
- 🔄 Flexible for relocation, expansion and recycling
- 🔧 Simple maintenance and service life in excess of 30 years
Specification
| Parameter | Value |
|---|---|
| Coating thickness | 250 ~ 450 µm |
| pH range | Standard grade 3 ~ 11 | Special grade 1 ~ 14 |
| Coating process | Standard 2 coats 2 fire; 3 coats 3 fire available |
| Hardness | 6.0 Mohs |
| Elasticity | 500 KN/mm |
| Service life | More than 30 years |
ⓘ The requirements for biogas digester tanks are essentially comprehensive requirements for safety, corrosion resistance, sealing, and functionality. The corrosion resistance and ease of construction of enameled bolted tanks / GFS bolted tanks are their main advantages for anaerobic reactors.
Uses of Glass Fused to Steel Tanks
Glass Fused to Steel Tanks are widely used in various industries and serve different purposes in different environments. These tanks are mainly used for:
- Municipal drinking water, sewage treatment, sludge storage, wastewater treatment and anaerobic digestion and biogas.
- Industrial wastewater treatment, storage, anaerobic digestion and biogas, process water storage and bulk solids storage.
- Agricultural slurry storage, on- and off-farm biogas production, storage of livestock feeds such as hay, maize and high-moisture grains, and bulk solids storage.
Renowned for their extended service life and minimal maintenance requirements owing to corrosion resistance and UV stability, glass-fused tanks cater to municipal, industrial, and agricultural needs.
Their superior corrosion resistance, durability and ease of maintenance make them ideal for storing and handling a wide range of liquids, chemicals and gases. Additionally, these glass fused bolted steel tanks can be used for rainwater harvesting, firefighting and storage of various industrial liquids.
Frequently Asked Questions
❓ What is a Glass-Fused-to-Steel (GFS) tank?
A Glass-Fused-to-Steel (GFS) tank is a bolted storage tank constructed by fusing high-strength TRS (titanium-rich steel) plates with specially formulated enamel at high temperatures. This process creates a highly inert inorganic glaze layer that provides exceptional corrosion resistance, making it ideal for applications such as biogas digesters, wastewater treatment, and liquid storage.
❓ What pH range can GFS tanks handle?
GFS tanks are available in two grades: the standard grade handles a pH range of 3 to 11, while the special grade can accommodate extreme conditions from pH 1 to 14. This makes them suitable for highly acidic or alkaline environments, including biogas digesters rich in hydrogen sulfide.
❓ How long is the service life of a Glass-Fused-to-Steel tank?
With proper installation and minimal maintenance, GFS tanks have a service life in excess of 30 years. Their UV stability and superior corrosion resistance contribute significantly to this extended lifespan, making them a cost-effective long-term investment for industrial, municipal, and agricultural applications.
❓ What industries use Glass-Fused-to-Steel tanks?
GFS tanks are used across a wide range of industries. Municipal applications include drinking water storage, sewage treatment, and sludge storage. Industrial uses include wastewater treatment, process water storage, and bulk solids storage. Agricultural applications include slurry storage, biogas production, and livestock feed storage such as hay, maize, and high-moisture grains.
❓ What are the main advantages of GFS tanks over conventional tanks?
GFS tanks offer several key advantages: excellent corrosion resistance against acids, alkalis, and corrosive gases; fast and straightforward installation with short construction periods; low maintenance requirements; strong adaptability to temperature variations; aesthetic appearance; and flexibility for relocation, expansion, or recycling. These features make them superior to conventional concrete or standard steel tanks in demanding environments.
❓ What is the coating thickness and hardness of GFS tanks?
The enamel coating on GFS tanks ranges from 250 to 450 micrometers in thickness and achieves a hardness of 6.0 on the Mohs scale. The standard coating process involves 2 coats and 2 firings, with an option for 3 coats and 3 firings for enhanced protection. The elasticity of the coating is rated at 500 KN/mm, ensuring durability under structural stress.