2017 ThaiWater,booth no.: Y36 - Bangkok (Jun.7th-10th)
2017 IndoWater,booth no.: CA05 - Djakarta (Jul.12th-14th)
2017 Brazil Fenasan,booth no.: F30 - Sao Paulo (Oct.2nd-6th)

As the leading GFS tanks manufacturer in China for many years, Center Enamel has developed its own brands ZZTANK ® and CECTANKS ™. We offer OEM service as well, producing based on customers' detailed requirement.

Timely and quality guaranteed!

Glass-Fused-to-Steel Tanks Production Steps

Fusion between steel sheet and glass coating is very important for Glass-Fused-to Steel tank, because it directly effect the GFS tank service life. In order to provide high quality product to our clients, Center Enamel conduct very strict quality control from raw material to final product. Before mass production, raw material and small sample test need to be done to check the quality of raw material and fusion between coating and steel panel, if qualified then mass production will be carried out. Tanks are produced on the automatic production line, to make sure good and stable quality control. After the production all steel panels need to be tested by 1500V spark holiday test, all steel panels are 0 discontinuity.

CNC Laser Cutting

Inputting the Confirmed drawing into the computer, bolt holes and openings will be cut

on CNC laser cutting machine automatically.

Steel Pre-treatment - Shot Blasting

Shot blasting according to SSPC SP10 standard, steel surface is in silver white color

Arch Bending

After shot blasting,steel panel need to be arch bent to a radian according to tank diameter.

Automatic Enamel Spraying

Spray the glass coating on both side of steel panels automatically. Coating thickness is controlled within 230 micron to 450 micron.

High Temperature Tunnel Oven

After enameling and drying, then firing steel panels in the oven at the temperatures ranging from 850℃ -940℃, which facilitates the interfacial fusion reactions that combine the two materials.

Product Inspection

Quality inspection need to be conducted after production, including: coating thickness, holiday test, color consistency.

Quantity Control

Quality Control is of immense importance and contributes directly to a manufacturer’s reputation and development. Therefore, we’re making consistently efforts on enhancing our quality control management throughout whole production processes from raw materials purchasing to finished products inspection, to assure that all Glass-Fused-to-Steel Tanks delivered by Center Enamel meet the international quality requirements.

Inspection & Analysis of Incoming Raw Materials

Batch-by-batch sampling plan for retrieval, make sure the actual operation conforms to the standards as all incoming materials need to be inspected for quality.

Acid & Alkali Resistance Test

Use 10g of solid citric acidor solid sodium carbonate to diluted with 100mldistilledwater (10% citric acid / 10% sodium carbonate solution) to test the acid and alkali resistance of the enameled panel.

1500V Holiday Test

Center Enamel conducts 1500V holiday test on double sides of all produced sheets, to make sure all delivered sheets are in best quality condition with zero discontinuity.

Impact Test

Use the hydraulic machine (pressing up to 15MPa)to test the fusion performance of enameled panel, make sure to offer increased longevity, ability to withstand higher mechanical stress and provide a safe solution to challenging storage applications.

Coating Thickness Test

Use the coating thickness gauges to test the enameling coating thickness, make sure Center Enamel’s Glass-Fused-to-Steel Tanks enameling coating thickness is in the standard range.

Tank Color Consistency Test

To make sure different thickness sheets from different batches can have same color shade, not only color pigments but alsoe nameled sheets need to be tested separately by a colorimeter.

Fish Scale Test

Put one standard enameled panel into the oven and fire at 400 ℃ for one hour, if no fish scale problem happens then it means the whole batch fabrication quality result is satisfied.

R&D capacity is the source of power for a company in the fierce competition today. Center Enamel laid great emphasis on R&D from its beginning. A group of skilled technicians comes out with the best solution for customers. We are proud of more than 200 patents of enamel frit formulas being made over the past 20 years. The special laboratory was set up for test and research. We also developed our own quality control system.

All Shijiazhuang Zhengzhong Technology Co., Ltd people work like a big family, it’s our pleasure to provide our best products and service to customers all over the world.

Sales team

This is a young group full of passion and dreams, they are keen to study and willing to provide our best service for overseas clients at any time.

R&D team

With a professional enamel frit research team and advanced laboratory equipment, Shijiazhuang Zhengzhong Technology Co., Ltd can develop new formulas which meet customized requests for all the different projects.

Design team

Experienced GFS tank design team, can provide professional tank design solutions according to different project requirements. Tank design complies with international standards such as AWWA D103-09, OSHA, ISO28765, and AUS1657, etc.

Production team

Product quality is the foundation of the company’s long-term development, with a professional production team and advanced production line, Shijiazhuang Zhengzhong Technology Co., Ltd offers high-quality tanks at the most favorable cost.

Installation team

The experienced installation team already installed glass fused-to-steel tanks in more than 30 countries.