Send Message

Shijiazhuang Zhengzhong Technology 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

The GFS tank are very durable and very strong enough. The installation work are very simple and rapid for this work job. Overall, the GFS tank are highly recommend

—— HW Chua

I'm Online Chat Now
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 all Glass-Fused-to-Steel Tanks delivered by Center Enamel meet the international quality requirements.


Inspection & Analysis of Incoming Raw Materials


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


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


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


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


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


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


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.






  • China Shijiazhuang Zhengzhong Technology Co., Ltd certification

    Standard:NSF61 certificate


    Issue Date:2016-02-14

    Scope/Range:drinking water, portable water storage

    Issued By:IAPMO R&T

  • China Shijiazhuang Zhengzhong Technology Co., Ltd certification



    Issue Date:2015-10-26

    Expiry Date:2018-10-25

    Scope/Range:enamel tank

    Issued By:IQNET and CQM

  • China Shijiazhuang Zhengzhong Technology Co., Ltd certification



    Issue Date:2015-07-06

    Scope/Range:LEDAR sealant

    Issued By:RJS center

  • China Shijiazhuang Zhengzhong Technology Co., Ltd certification


    Issue Date:2017-03-27

  • China Shijiazhuang Zhengzhong Technology Co., Ltd certification


    Issue Date:2012-08-21

Contact Details
Shijiazhuang Zhengzhong Technology Co., Ltd

Contact Person: Ms. melody wong

Tel: 0086-18520168185

Fax: 86-020-34112006

Send your inquiry directly to us (0 / 3000)