China GFS Tank Manufacturer for Potable and Process Water Storage
Created on 02.15
China GFS Tank Manufacturer for Potable and Process Water Storage
Center Enamel (Shijiazhuang Zhengzhong Technology Co., Ltd) has designed and fabricated bolted storage tanks since 2008 and was the first glass-fused-to-steel tank manufacturer in China. It holds close to 200 enamel-related patents, produces roughly 300,000 enamel-coated steel plates a year, has completed more than 30,000 installed projects and ships to over 100 countries, with single tanks supplied up to 60,000 m³. Manufacturing runs under ISO 9001 and ISO 45001 with NSF/ANSI 61, WRAS, FDA, LFGB, CE (EN 1090), ISO 28765, FM, BSCI and EUROCODE certification, and design referenced to AWWA D103-09, AWWA C550 and NFPA where required.
Sourcing a glass-fused-to-steel tank from China is an engineering procurement exercise, not a purchasing one, and the first question is never price. It is whether the factory can hold enamel quality across a full production run, whether the panel schedule has been calculated rather than copied, and whether the documents will survive a third-party inspection. Those three answers separate a manufacturer that fuses glass to steel at 820 to 930 °C as a core process from a trading house that buys coated plate elsewhere. This article sets out what a China-based GFS manufacturer actually delivers, in the terms a project engineer can verify.
What the manufacturing base looks like
Capacity is what makes enamel quality repeatable rather than occasional. Fused enamel plate is produced in a furnace cycle, and the plant that runs it year-round holds the fusion window far more tightly than one that jobs in small lots. Center Enamel produces roughly 300,000 enamel-coated steel plates a year, supports the work with close to 200 enamel-related patents, and added a new 150,000 m² production base to raise output capacity. That scale matters for the customer in a specific way: a 27-tank industrial wastewater order and a single 44,900 m³ large diameter tank come off the same line with the same plate specification, so the inspection criteria do not change with order size. Single tanks are supplied up to 60,000 m³, which covers nearly every project where the diameter does not become the constraint.
The quality chain from plate to delivered tank
The documented checks are what a third-party inspector will ask for. The enamel layer runs 0.25 to 0.45 mm and is rated above 3,450 N/cm² in bending and compression, fused to the steel substrate so there is no organic binder to hydrolyze; it is inert across pH 1 to 14 and smooth below 0.8 µm Ra for easy clean-down. Every enamel-coated plate is spark tested at 1500 V DC before shipment to find pinhole holidays, and the plate then carries an identifying record through coating, crating and assembly. The assembly uses factory-prepared panels about 1.2 m wide with 8.8-grade bolts and a gasketed joint. The two failure modes in this product family — delamination at the fusion interface from a distorted shell, and pinhole development from impact — are both manufacturing controlled, and the spark test plus the panel record is the evidence chain an inspector follows.
Certifications, references and what they cover
Ask which certificate answers which part of the supply. NSF/ANSI 61 and WRAS cover potable water contact. FDA and LFGB cover food contact. CE (EN 1090) and ISO 28765 cover the structural and fabrication deliverable into Europe. FM and BSCI are asked for on some international tender lists, and EUROCODE is referenced in European design work. The management system is ISO 9001 and ISO 45001. On the design side, the references are AWWA D103-09 for the tank, AWWA C550 and AWWA D108 and API 650 for coatings and roof systems, and NFPA where fire service applies. None of these are substitutes for one another, and a supplier who lists them without saying what each covers has not done the work.
Delivery record and export experience
A manufacturer is judged on whether the same quality arrives on the fifth continent as on the first. More than 30,000 installed projects and supplies to over 100 countries, including the United States, Australia, Canada, Malaysia, Indonesia, Russia, the United Arab Emirates, Panama, Brazil and South Africa, give a project team something more useful than a claim: familiar documentation packages, experience with several climate and seismic zones, and a supply chain that has already cleared customs in dozens of jurisdictions. Batch delivery is the harder proof. Twenty-seven industrial wastewater tanks totalling 30,469 m³ in one programme, ten municipal tanks totalling 17,420 m³, and a 21,099 m³ drinking water tank at about 42.04 m diameter by 15.2 m are the kind of orders that expose a plant that cannot repeat itself.
Technical Specification
Parameter | Typical Value / Range | Note |
Fusion temperature | 820–930 °C | Core GFS process, no organic binder layer |
Enamel layer thickness | 0.25–0.45 mm | Rated above 3,450 N/cm² bending and compression |
Surface roughness | Ra < 0.8 µm | Supports food and potable contact claims |
pH resistance | 1–14 | Inert across acid and alkaline duty |
Spark test | 1500 V DC | Per-plate holiday detection before shipment |
Panel width | ~1.2 m | Factory-prepared bolted panel |
Bolting | 8.8-grade bolts | Dismountable, reusable assembly |
Single tank capacity | up to 60,000 m³ | Diameter is usually the real limit |
Annual plate output | ~300,000 plates | Basis of repeatable quality |
Design life | ≥ 30 years | Normal service condition |
What to ask before awarding a GFS order in China
Six questions sort manufacturers from trading companies. How many enamel furnaces and what is the annual coated plate output. Can the works test report show a per-plate spark test record with plate identification, not just a batch statement. What is the plate thickness schedule for the diameter you want, and who calculated it. Where does the steel substrate come from and is there a mill certificate. Is the foundation and settlement requirement written into the drawing package, since enamel panels will not accommodate an out-of-round shell. And what documents ship with the order — drawings, specification, material certificate, coating test report and the inspection plan — because those arrive before the tank does and are what releases payment.
Project Case
Project | Location | Product | Capacity | Scope |
Large diameter bolted water tank | Namibia | GFS tank | 44,900 m³ | Supply and supervision |
Drinking water storage | Indonesia | GFS tank | 21,099 m³ (about 42.04 m diameter by 15.2 m) | Potable water supply |
Industrial wastewater tanks | Xinjiang, China | GFS tanks | 30,469 m³ across 27 tanks | Batch supply and supervision |
Municipal wastewater tanks | Sichuan, China | GFS tanks | 17,420 m³ across 10 tanks | Multi-tank municipal programme |
Drinking water storage | Malaysia | GFS tank | 20,380 m³ | Potable water supply |
Center Enamel Engineering Capability
Center Enamel (Shijiazhuang Zhengzhong Technology Co., Ltd) has designed and fabricated bolted storage tanks since 2008. As the first glass-fused-to-steel (GFS) tank manufacturer in China, the company holds close to 200 enamel-related patents, produces roughly 300,000 enamel-coated steel plates a year, has completed more than 30,000 installed projects and supplies its tanks to over 100 countries. The new 150,000 m² production base was added to raise output capacity, and single tanks are supplied up to 60,000 m³. Manufacturing runs under ISO 9001 and ISO 45001, with product certification including NSF/ANSI 61, WRAS, FDA, LFGB, CE (EN 1090), ISO 28765, FM, BSCI and EUROCODE, and design referenced to AWWA D103-09, AWWA C550 and NFPA where the application requires it.
As a China based GFS tank manufacturer, that is the standing this article is written from: the same fusion process, the same plate record and the same document package whether the order is one 846 m³ stainless tank or a 27-tank industrial wastewater programme.
Frequently Asked Questions
Q1: How long has Center Enamel been making GFS tanks?
A1: The company has designed and fabricated bolted storage tanks since 2008 and was the first glass-fused-to-steel tank manufacturer in China. That history is why the fusion process, the spark test regime and the document package are fixed rather than arranged per order.
Q2: What is the largest single tank available?
A2: Single tanks are supplied up to 60,000 m³. In practice the diameter is usually the binding constraint before volume is, because foundation, roof wind load and site access scale with diameter faster than height does.
Q3: Which certifications apply to a potable water order?
A3: NSF/ANSI 61 and WRAS cover potable water contact, FDA and LFGB cover food contact, and CE (EN 1090) and ISO 28765 cover the structural deliverable. ISO 9001 and ISO 45001 cover the management system. Ask which certificate answers which scope in the submission.
Q4: How do I verify enamel quality on the factory floor?
A4: Ask for the per-plate 1500 V DC spark test record with plate identification, the enamel thickness and adhesion results, the surface roughness report, and the steel mill certificate. A manufacturer that can produce those per plate has a fused process; one that produces only a batch statement is buying coated plate.
Q5: Can the factory handle a large multi-tank order?
A5: Yes, and repeatability under batch is the real test. Roughly 300,000 enamel-coated plates a year, a new 150,000 m² base and more than 30,000 installed projects support multi-unit programmes of the size delivered in Xinjiang, Sichuan and elsewhere.
Q6: Which standards does the design reference?
A6: AWWA D103-09 for the tank, AWWA C550 for fusion bonded epoxy where specified, AWWA D108 and API 650 for dome roofs, and NFPA where fire service applies. Roof wind and snow load is taken from ADM 2015 and ASCE 7-10.
Q7: What documents ship with the order?
A7: Drawings, material specification, steel mill certificate, enamel coating test report, per-plate spark test record, surface roughness report, the foundation and settlement drawing, and an inspection plan. Those are the documents that release payment and clear third-party inspection.
Choosing a China-based glass-fused-to-steel manufacturer comes down to whether the enamel fusion is a plant process or a purchased input, and that is visible in the per-plate documentation rather than in the brochure. The manufacturer that fuses at 820 to 930 °C, spark tests every plate at 1500 V DC and can show a full document package will deliver the same tank to the twenty-seventh unit as to the first. Center Enamel's standing — production since 2008, close to 200 enamel patents around 300,000 plates a year, more than 30,000 installed projects, over 100 countries and single tanks to 60,000 m³ — is the context for that decision, not the conclusion of it.
Talk to an Engineer
Send us the service medium, the capacity and the available footprint, the design standard or code the project is contracted against, the required certification list, and the site wind, snow and soil conditions. We will return a diameter and height recommendation, a panel and plate schedule, the certification and document list for your tender, and a manufacturing schedule. You get the engineering and the file list first, with no obligation and no sales call until the package is complete.
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