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Center Enamel Co.,Ltd Quality Control

It is really a great pleasure to work with this company ,I can always get the solution timely and on budget

—— Micheal Jonson

Highly recommend this company ! I am a water and wastewater project contractor ,.I am so glad to find such a trustworthy tank supplier .

—— Martin Jäger

Good service ,very patient to help me find the best solution .I will buy more tanks from them in the near future .

—— William Koh

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QC Profile

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 allGlass-Fused-to-Steel Tanks delivered by Center Enamelmeet 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 materialsneed to be inspected for quality.


Acid & Alkali Resistance Test

Use 10g of solid citric acidor solid sodiumcarbonate 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

Use the coating thickness gauges to test the enameling coating thickness, make sure Center Enamel’s Glass-Fused-to-Steel Tanksenameling coating thicknessis in standardrange.


Tank Color Consistency

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


Fish Scale Test

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






  • Standard:NSF61 certificate


    Issue Date:2016-02-14

    Scope/Range:drinking water, portable water storage

    Issued By:IAPMO R&T

  • Standard:ISO9001


    Issue Date:2015-10-26

    Expiry Date:2018-10-25

    Scope/Range:enamel tank

    Issued By:IQNET and CQM

  • Standard:FDA


    Issue Date:2015-07-06

    Scope/Range:LEDAR sealant

    Issued By:RJS center

Contact Details
Center Enamel Co.,Ltd

Contact Person: Ms. melody wong

Tel: 86-20-34061629

Fax: 86-020-34112006

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