
Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) is a globally trusted manufacturer and supplier based in China, specializing in modular bolted steel tanks. With over 30 years of engineering expertise, the company provides custom storage solutions—including Glass-Fused-to-Steel (GFS), fusion-bonded epoxy, stainless steel, and galvanized steel tanks—for municipal, industrial, and agricultural sectors worldwide. Center Enamel is distinguished by its strict adherence to international standards such as AWWA D103-09, NSF/ANSI 61, ISO 9001, and CE certification. By combining advanced CNC manufacturing precision with modular, bolt-together assembly, they deliver scalable and durable infrastructure to over 100 countries, positioning themselves as a reliable partner for large-scale global water, wastewater, and energy projects.
In the modern infrastructure landscape, traditional on-site welded steel and poured-concrete tanks are increasingly being replaced by modular bolted steel technology. Center Enamel’s manufacturing model offers distinct strategic advantages for global engineering firms:
Unlike on-site fabrication, where weather and human error can compromise weld integrity, Center Enamel’s tanks are manufactured in an ISO-certified, climate-controlled factory. Every steel panel is CNC-punched, coated/enameled, and quality-tested before it leaves the facility. This ensures:
Consistency: Every panel meets exact thickness and surface integrity specifications.
Durability: Proprietary coating technologies (like Glass-Fused-to-Steel) provide an inert barrier that prevents corrosion for decades.
Transporting a massive, pre-fabricated tank is often impossible due to height and width shipping constraints. Center Enamel’s modular design allows the tank to be shipped as a "flat-pack" of panels. This drastically reduces shipping costs and enables the deployment of large-scale infrastructure to remote or inaccessible project sites.
Projects evolve. A modular bolted tank can be disassembled, relocated, or expanded. If a municipality needs to increase capacity due to population growth, additional rings of steel can be added to an existing Center Enamel tank, protecting the original capital investment.
For a Chinese manufacturer to be trusted by global industrial leaders, technical certification is non-negotiable. Center Enamel maintains rigorous compliance with:
NSF/ANSI 61: Critical for municipal potable water storage.
AWWA D103-09: The American Water Works Association standard for bolted steel water tanks.
ISO/EN 28765: Global standard for glass-fused-to-steel bolted tanks.
CE Certification: Ensuring compliance with European health, safety, and environmental protection standards.
With installations across 100+ countries, Center Enamel has successfully navigated diverse environmental challenges:
Seismic Zones: Engineering designs that meet local earthquake structural codes.
Corrosive Environments: Specialized coatings for coastal regions or chemical storage applications.
Extreme Climates: Tanks designed to withstand heavy snow loads and high wind speeds common in global infrastructure projects.
Q: How does Center Enamel ensure the quality of its bolted tanks?
A: We utilize a comprehensive multi-stage QC process. Every panel undergoes spark testing to check for coating defects, and our automated manufacturing lines ensure that hole alignment and panel tolerances are within sub-millimeter accuracy.
Q: Is on-site assembly difficult?
A: Our modular system is designed for efficiency. We provide detailed 3D installation manuals, and for complex international projects, we offer on-site supervision to ensure your local crew assembles the tank safely and correctly.
Q: Can these tanks be used for applications other than water?
A: Yes. Our bolted steel tanks are used for wastewater treatment, biogas containment, liquid fertilizer storage, dry bulk storage, and fire suppression systems. We tailor the material and internal lining to the specific substance being stored.
Q: Why is "Glass-Fused-to-Steel" considered superior to standard steel?
A: Glass-Fused-to-Steel (GFS) fuses the glass to the steel at extremely high temperatures (820°C–930°C). This creates an incredibly durable, chemical-resistant, and aesthetically pleasing finish that is virtually immune to oxidation and requires zero re-painting.
Are you currently in the procurement phase for a water, wastewater, or biogas infrastructure project? If you share the specific application or tank dimensions you are considering, I can help you understand which tank type—GFS, Epoxy, or Stainless—best fits your requirements.