Shijiazhuang ZhengzhongTechnology Co., Ltd.
About
Center Enamel (CEC Tanks), operating as Shijiazhuang Zhengzhong Technology Co., Ltd., is a Chinese bolted storage tank manufacturer headquartered in Shijiazhuang. The company claims to be the first Chinese manufacturer of glass-fused-to-steel tanks, having successfully developed double-side enameled hot-rolled steel plate in Asia in 2005. Founded in 2008, CEC has completed over 30,000 projects across more than 100 countries with annual production capacity of 300,000 steel plates and a production area exceeding 150,000 m². The flagship product is the glass-fused-to-steel (GFS) tank, where steel panels receive a double-sided enamel coating fired at 820–930°C to create a permanent corrosion-resistant bond with a stated 30+ year service life — CEC holds nearly 200 enameling patents. Notable milestones include the highest GFS tank at 34.8m (2017), the largest single tank volume at 21,094 m³ (2020), and the largest GFS tank at 32,000 m³ (2024). The product range also includes fusion bonded epoxy (FBE) tanks, stainless steel tanks, galvanized steel tanks, aluminum geodesic dome roofs, welded steel tanks, and double membrane roofs for biogas containment. For EPC projects, CEC supplies mechanical bar screens, solid-liquid separators, submersible mixers, gas holders, biogas generators, desulfurization tanks, sludge dewatering machines, centrifuges, sewage pumps, three-phase separators, and PAM dosing devices. Products carry ISO 9001, NSF/ANSI 61, EN 1090, ISO 28765, WRAS, FM, LFGB, BSCI, ISO 45001, CE, FDA, and RoHS certifications and comply with AWWA D103-09, OSHA, NFPA, and EUROCODE design standards. CEC is notably the only GFS tank manufacturer in China widely accepted in the US market.
Key Products
Bolted steel tanks with glass enamel coating fired at 820-930°C creating a permanent corrosion-resistant bond with 30+ year service life for water and wastewater storage
Epoxy-coated steel bolted tanks providing cost-effective corrosion protection for potable water and industrial storage
High-purity storage tanks in stainless steel construction for applications requiring superior hygiene and chemical resistance
Standard bolted galvanized steel tanks for general-purpose liquid and bulk material storage
Self-supporting aluminum dome roof systems providing weather protection for open-top tanks without requiring internal columns
Custom-welded storage solutions for large-capacity applications requiring monolithic construction
Gas-tight roof systems for anaerobic digester and biogas applications providing biogas containment and collection
Solid waste screening equipment for removing debris from wastewater intake at treatment plants
Equipment for separating solids from liquid waste streams in wastewater and industrial processing
Mixing equipment for anaerobic digesters and treatment tanks to maintain suspension and process uniformity
Biogas storage and collection systems for anaerobic digestion applications
Power generation equipment converting biogas from anaerobic digestion into electricity and heat
Gas treatment systems removing hydrogen sulfide from biogas to protect downstream equipment and meet emission standards
Equipment for reducing sludge moisture content to minimize volume for transport and disposal
High-speed separation equipment for sludge processing and solid-liquid separation in wastewater treatment
Pumping equipment for wastewater transport and lift station applications
Equipment separating gas, liquid, and solid phases in anaerobic digestion and industrial processing
Chemical dosing systems using polyacrylamide for flocculation and sludge conditioning in wastewater treatment
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