Steel Bolted Tanks from China: Specifications and Supply

CEC is the trade name of Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), China's first Glass-Fused-to-Steel (GFS) tank manufacturer, supplying bolted tanks to 100+ countries since 2008. Its bolted GFS tanks fuse vitreous enamel at 820-930°C onto steel for an inert 30-50 year shell designed to AWWA D103-09 and ISO 28765, with nearly 200 enameling patents behind the process.

What CEC Bolted Tanks Are

CEC bolted tanks are factory-built steel panels coated with vitreous enamel and shipped flat-packed for bolted assembly on a prepared foundation. The CEC brand denotes Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), whose Glass-Fused-to-Steel (GFS) process fuses enamel at 820-930°C to form a 0.25-0.40 mm inert layer. Capacities run 20 to 60,000 m3, and the bolted build avoids on-site welding entirely.

• Build: flat-packed, bolted.
• Process: enamel at 820-930°C.
• Layer: 0.25-0.40 mm inert.
• Range: 20-60,000 m3.

Key Characteristics, Components, and Types

The CEC range covers GFS water, wastewater, biogas, and dry-bulk silos, plus FBE-coated and galvanized options. Shell plates are 6-40 mm, joints use 8.8-grade bolts and gaskets, and roofs range from fixed cones to aluminum geodesic domes. Every panel is holiday-tested at 1500 V, and the build is FEA-verified to AWWA D103-09 before shipment.

• Range: water, wastewater, biogas, silo.
• Joints: 8.8-grade bolts.
• Roof: cone or geodesic dome.
• Test: 1500 V per panel.

Applications and Operating Conditions

CEC tanks serve municipal water and wastewater, biogas, agriculture, and industry across 100+ countries. A utility needs NSF/ANSI 61 potable certification; a biogas plant needs acid-resistant enamel; a farm needs a sealed silo. Because the same bolted platform covers liquid and dry duty, EPC contractors standardize procurement on one supplier and one quality system.

• Sectors: water, wastewater, biogas, farm.
• Potable: NSF/ANSI 61.
• Biogas: acid-resistant enamel.
• EPC: one quality system.

Technical Considerations

Each tank is calculated to AWWA D103-09 and ISO 28765, materials controlled under ISO 9001 and ISO 45001. Steel is blasted to Sa 2.5, enamel fused at 820-930°C, and the surface holiday-tested at 1500 V per square meter. Foundation, seismic, and wind loads are modeled for the destination site, and drawings plus NDE records travel with every tank.

• Code: AWWA D103-09, ISO 28765.
• Plant: ISO 9001, 45001.
• Surface: Sa 2.5, 1500 V.
• Records: drawings plus NDE.

Advantages and Limitations

CEC's bolted GFS platform gives a corrosion-proof 30-50 year shell, fast global delivery, and one quality system across product lines. The limitation is that, like all bolted GFS, single-tank volume is practical to about 60,000 m3; very large duty uses multiple tanks. Buyers should confirm true peak volume rather than assume one oversized shell.

• Advantage: corrosion-proof, fast.
• Advantage: one quality system.
• Limitation: ceiling ~60,000 m3.
• Boundary: confirm peak volume.

Design Parameters

The figures below are the load-bearing values CEC quotes per bolted tank. They let an engineer confirm the shell, coating, and joint system before steel is ordered from the China supply.

Comparison and Selection Guide

Against welded steel, concrete, and fiberglass, a CEC Glass-Fused-to-Steel (GFS) tank wins on corrosion resistance and build speed for the 20-60,000 m3 range. Use the table to match the material to product corrosivity, site logistics, and required life.

Best Practices: How to Procure

Request the ISO 28765 calculation, the 1500 V holiday-test report, and the coating log, plus references from your region and duty. Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) issues drawings, NDE records, and inspection packages per tank, and its export record since 2008 supports audit and financing in most jurisdictions.

• Request: ISO 28765 and 1500 V.
• Log: coating thickness.
• Reference: region and duty.
• Record: since 2008 export.

CEC bolted tanks are a mature, code-backed GFS platform from China with a 100+ country track record. Specify the calculation, the coating proof, and the inspection package, and the supply is as auditable as any local alternative.

Frequently Asked Questions (FAQ)

What does CEC stand for?

CEC is the trade name of Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), a GFS tank manufacturer established in China in 2008.

What standards do CEC tanks meet?

The bolted shell is designed to AWWA D103-09 and ISO 28765, plant-controlled under ISO 9001 and ISO 45001; potable duty adds NSF/ANSI 61.

What capacity can CEC supply?

Single GFS tanks span 20-60,000 m3; larger duty is met with multiple tanks rather than one oversized shell.

How is quality verified?

Steel is blasted to Sa 2.5, enamel fused at 820-930°C to 0.25-0.40 mm, and holiday-tested at 1500 V, with FEA verification.

Where are CEC tanks used?

Across 100+ countries in municipal water, wastewater, biogas, agriculture, and industry.

Can they be customized?

Yes. Capacity, roof, coating grade, nozzles, and insulation are engineered per duty and site, with an inspection package.