High Corrosion Resistance Biogas Digesters from China Suppliers & Factory - GFS Tanks for Acidic Environments
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.
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
| Coating thickness | 250~450um |
| 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 | 500KN/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 enamel coatings 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 withstand?
GFS tanks are available in two grades: the standard grade handles a pH range of 3 to 11, while the special grade can withstand extreme conditions from pH 1 to 14. This makes them suitable for highly acidic or alkaline environments, including biogas digesters rich in hydrogen sulfide and other corrosive gases.
How long is the service life of a Glass-Fused-to-Steel tank?
GFS tanks are engineered for a service life in excess of 30 years. Their longevity is attributed to the highly durable enamel coating (6.0 Mohs hardness), UV stability, and excellent corrosion resistance, all of which significantly reduce maintenance requirements over the tank's operational lifetime.
What industries use Glass-Fused-to-Steel tanks?
GFS tanks serve a wide range of industries. In the municipal sector, they are used for drinking water storage, sewage treatment, and sludge management. Industrially, they handle wastewater treatment, process water, and bulk solids storage. In agriculture, they are used for slurry storage, biogas production, and storing livestock feeds 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: fast installation with short construction periods, excellent corrosion and UV resistance, low construction environment requirements, strong temperature adaptability, an aesthetically pleasing appearance, and flexibility for relocation, expansion, or recycling. Their bolted assembly design also makes them easy to transport and reassemble at different sites.
What coating process is used for GFS tanks?
The standard coating process for GFS tanks is a 2-coat, 2-fire process, which applies two layers of enamel with two firing cycles to ensure strong adhesion and uniform coverage. A more advanced 3-coat, 3-fire process is also available for applications requiring even higher levels of protection. The coating thickness typically ranges from 250 to 450 micrometers.