Center Enamel: China’s Leading Water Storage Tanks Manufacturer
- Market Pioneer:Established in 2008, Shijiazhuang Zhengzhong Technology Co., Ltd. (known globally as Center Enamel) is Asia’s first and most experienced manufacturer of Glass-Fused-to-Steel (GFS) bolted tanks.
- Diversified Portfolio:Engineers and manufactures GFS tanks, Fusion Bonded Epoxy (FBE) tanks, Stainless Steel bolted tanks, Galvanized Steel tanks, and Aluminum Geodesic Dome Roofs.
- Global Compliance:Only Chinese bolted tank manufacturer whose engineering designs and quality systems are widely accepted in the rigorous US municipal and industrial markets, strictly meeting AWWA D103-09, NSF/ANSI 61, ISO 28765, WRAS, and FM Approval.
- International Footprint:Successful installations in over 100 countries with key clients including Veolia, Coca-Cola, Sabesp, Heineken, and PetroChina.
Over 30 Years of Engineered Excellence
Finding a containment supplier that balances advanced technology with decades of field-proven durability can be a challenge. In the industrial and municipal water sectors, Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) has set the gold standard in Asia since 1989.
What started as a pioneer in enamel formula research has evolved into a global, state-of-the-art smart manufacturing leader. Based in Shijiazhuang, China, the company operates an advanced production facility utilizing CNC laser cutting and automated spraying with tunnel baking ovens. This facility produces up to 300,000 steel plates annually, ensuring that global infrastructure projects are supplied on time without compromising quality.
A major point of pride came in 2008 when Center Enamel was selected as the direct wastewater treatment tank supplier for the Beijing Olympic Games, proving its capability to deliver under the most demanding global spotlights.
Innovative Tank Technologies: GFS, FBE, and Beyond
Industrial liquid storage demands specific materials depending on the chemical composition, temperature, and location of the project. Center Enamel designs customized solutions across several advanced tank types:
- Tanques de Vidro-Fundido ao Aço (GFS)
Also known as glass-lined steel (GLS) tanks, these are Center Enamel’s flagship product. In this process, raw steel plates are sprayed with a specialized glass enamel coating and fired in a high-temperature furnace at 820°C to 930°C.
This high heat triggers a physical and chemical fusion, bonding the inert glass coating permanently to the strength-contributing steel. The result is a tank that combines the structural strength of steel with the unparalleled chemical and corrosion resistance of glass, yielding an expected service life of over 30 years with minimal maintenance.
- Fusion Bonded Epoxy (FBE) Tanks
For projects prioritizing cost-effectiveness alongside robust impact resistance, Center Enamel offers Fusion Bonded Epoxy (FBE) tanks. Employing a electrostatic powder coating system, the steel plates are coated in a controlled environment and heat-cured. Designed in collaboration with world-renowned coating manufacturers, these tanks meet the strict AWWA D103-09 and ISO 9227 standards, providing an ideal solution for municipal wastewater, fire protection, and agricultural applications.
- Stainless Steel Bolted Tanks
For highly corrosive industrial chemicals, food-grade processing, or ultra-pure water storage, Center Enamel manufactures bolted stainless steel tanks (utilizing SUS304, SUS316L, or Duplex Stainless Steel). The bolted design eliminates the need for on-site field welding, significantly reducing installation time and eliminating the risk of localized weld corrosion.
Global Standards, Certifications, and Engineering Codes
Engineering integrity is non-negotiable when dealing with large-scale liquid containment. Center Enamel is the only Asian manufacturer capable of meeting the stringent requirements of the United States and European markets over multiple decades.
The company’s structural designs are backed by rigorous calculation software and strictly adhere to the following global standards:
- AWWA D103-09:The American Water Works Association standard for bolted steel water tanks, governing seismic design, wind loading, and structural safety factors.
- NSF/ANSI 61 & WRAS:Drinking water system components certifications, confirming that the tank materials and glass coatings do not leach harmful impurities into municipal drinking water.
- ISO 28765:The international standard specifically regulating vitreous and porcelain enameling for bolted steel tanks.
- FM Approved:Certifies that Center Enamel’s tanks meet the ultra-strict safety guidelines required for fire protection water storage.
Technical Comparison Matrix of Center Enamel Tanks
The following matrix highlights the differences between Center Enamel’s primary liquid containment technologies to help project managers select the ideal solution:
| Tank Type | Primary Material / Coating | Relevant Design Standards | Key Application Fields | Expected Service Life |
| Vidro-Fundido ao Aço (GFS) | Enamel Fused to Steel at 820°C–930°C | AWWA D103, NSF/ANSI 61, ISO 28765, WRAS | Municipal Sewage, Industrial Wastewater, Biogas, Potable Water, Leachate | Mais de 30 Anos |
| Epóxi Ligado por Fusão (FBE) | Thermosetting Electrostatic Epoxy Powder | AWWA D103-09, ISO 9227/ASTM B117 | Fire Water Tanks, Municipal Sewage, Irrigation, Food/Bulk Solids | 20 to 25 Years |
| Stainless Steel Bolted | Bolted SUS304, SUS316L, or Duplex Steel | AWWA D103, ISO 9001 | High-Purity Water, Highly Corrosive Chemicals, Food Processing | Mais de 30 Anos |
| Galvanized Steel | Hot-Dip Zinc Coating | AWWA D103, ISO 1461 | Agricultural Irrigation, Fire Fighting Water, Fire Sprinkler Systems | 15 to 20 Years |
Perguntas Frequentes (FAQ)
What is a Glass-Fused-to-Steel (GFS) tank, and how does it prevent rust?
A GFS tank is made by firing specialized glass enamel onto steel plates at temperatures reaching up to 930°C. This process chemically fuses the glass and steel. Because glass is entirely inert, it acts as a permanent physical barrier that prevents water, acids, and corrosive chemicals from ever coming into contact with the underlying steel, completely eliminating rust and oxidation.
Are Center Enamel tanks safe for storing municipal drinking water?
Yes, absolutely. Center Enamel’s drinking water storage tanks are fully certified under NSF/ANSI 61 and the UK’s WRAS (Water Regulations Approval Scheme). These international standards guarantee that the coatings used are completely non-toxic, do not affect the taste or odor of the water, and do not leach chemicals into the supply.
Why choose bolted tanks over field-welded concrete or steel options?
Bolted steel tanks offer massive advantages in installation speed, cost, and maintenance:
- Quick Assembly:They are assembled on-site using specialized jacks and bolts, requiring no welding or heavy scaffolding.
- Weather Independence:Unlike concrete, which cannot be poured in freezing or wet conditions, bolted tanks can be constructed in almost any weather.
- Expandability & Transport:They can be disassembled, shipped in compact containers, and even expanded in height later if capacity needs increase.
Can Center Enamel design tanks for high-wind or seismic zones?
Yes. Every tank engineered by Center Enamel undergoes custom structural calculations based on its installation location. The engineering department utilizes advanced modeling to ensure compliance with local seismic, wind load, and snow load requirements, strictly adhering to AWWA D103-09 e Eurocode standards.
