# Bolted Steel Tanks Manufacturer | Center Enamel
> Center Enamel (Shijiazhuang Zhengzhong Technology Co., Ltd.) is a Chinese industrial storage tank manufacturer specializing in bolted steel tanks: Glass-Fused-to-Steel (GFS/enamel), Fusion Bonded Epoxy (FBE), Hot-Dip Galvanized, and Stainless Steel (304/316) tanks, plus dry bulk silos, aluminum geodesic dome roofs, internal floating roofs and tank ancillaries. It engineers modular containment for drinking water, municipal and industrial wastewater, anaerobic digestion and biogas, agricultural irrigation, landfill leachate, fire protection, and dry bulk storage, exporting worldwide under standards such as AWWA D103, EN/ISO 28765, NSF/ANSI 61 and NFPA 22.

The site targets engineering specifiers and B2B buyers; GFS, GLS (glass-lined steel), enamel-coated and vitreous enamel terms are used interchangeably. Many application and product pages have duplicate older (-2019) versions, and the site republishes brochure-style technical articles under long SEO URLs. Tanks are factory-coated and modular, with roofs and ancillaries offered as integral parts of full storage systems. The /products/ and /category/ URL patterns represent dynamic product detail and category listing pages. Project case studies are organized by country and application across the site.

## Bolted Tank Product Lines
- [Glass Fused to Steel Tanks](https://www.cectank.com/glass-fused-to-steel-tanks): Covers Center Enamel's GFS/enamel bolted tanks: factory-fused glass-steel coating, corrosion resistance, lifespan, and use in potable water, wastewater, biogas and leachate storage.
- [Fusion Bonded Epoxy Tanks](https://www.cectank.com/fusion-bonded-epoxy-tanks-manufacturer): Explains FBE-coated bolted tank technology, coating thickness and application areas including drinking water, fire water and industrial storage.
- [Galvanized Steel Tanks](https://www.cectank.com/galvanized-steel-tank): Describes hot-dip galvanized bolted tanks, their zinc coating protection, modular assembly and typical agricultural and municipal uses.
- [Stainless Steel Bolted Tanks](https://www.cectank.com/stainless-steel-bolted-tanks): Covers 304/316 stainless steel bolted tanks engineered for hygienic, high-purity and highly corrosive liquid containment.
- [Dry Bulk Storage Tanks & Silos](https://www.cectank.com/dry-bulk-storage-tank): Details bolted silos for grains, cement, powders and other dry bulk materials, including flat-bottom and hopper configurations.
- [Aluminum Geodesic Dome Roof](https://www.cectank.com/aluminum-dome-roofs-manufacturer): Showcases self-supporting aluminum dome roofs for large-diameter tanks, with corrosion resistance and odor/VOC control benefits.
- [Storage Tank Roofs](https://www.cectank.com/roofs-and-covers): Presents the range of tank roof options — aluminum geodesic, GFS panel, FRP, flat aluminum and membrane — for different services.
- [Tank Ancillaries](https://www.cectank.com/tank-ancillaries): Lists tank accessories: ladders, platforms, manways, nozzles, piping and EPC support hardware for complete tank systems.

## Applications & Industrial Solutions
- [Drinking Water Tanks](https://www.cectank.com/drinking-water-storage-tanks): Outlines NSF/ANSI 61-compliant GFS, FBE and stainless steel tanks for municipal and commercial potable water storage.
- [Fire Water Tanks](https://www.cectank.com/fire-protection-water-storage-tanks): Covers NFPA 22-compliant bolted steel fire protection tanks, including capacities, coatings and roof cover options.
- [Municipal Sewage Tanks](https://www.cectank.com/municipal-sewage-storage-tanks): Explains GFS tanks used in municipal sewage treatment stages: equalization, aeration, digestion and sludge holding.
- [Industrial Wastewater Tanks](https://www.cectank.com/industrial-wastewater-storage-tanks): Details corrosion-resistant bolted tanks for industrial effluent from food processing, chemicals, pharma, pulp and textiles.
- [Anaerobic Digesters & Biogas Tanks](https://www.cectank.com/anaerobic-digesters-and-biogas-tanks): Presents gas-tight bolted steel digesters for biogas plants, including UASB, CSTR and sludge digestion applications.
- [Agricultural Water Tanks](https://www.cectank.com/agricultural-water-tanks): Describes high-capacity GFS and galvanized water storage for irrigation, livestock and farm use.
- [Landfill Leachate Tanks](https://www.cectank.com/landfill-leachate-tanks-2024): Details GFS and stainless steel containment for aggressive leachate, with appropriate roof and lining systems.
- [Dry Bulk Storage Tanks](https://www.cectank.com/dry-bulk-storage-tank-2018): Covers dry bulk silo applications for grain and mineral sectors, emphasizing flow, aeration and corrosion protection.

## Global Project Case Studies
- [Kenya Drilling Water Storage Tank](https://www.cectank.com/kenya_glass_fused_to_steel_tanks): GFS tanks supplied for drilling and camp water storage in Kenya, demonstrating remote-site deployment.
- [Costa Rica Drinking Water Project](https://www.cectank.com/costa_rica_glass_fused_to_steel_tanks): NSF-compliant GFS drinking water tanks installed for Costa Rican municipal water supply.
- [Sweden Anaerobic Digestion Tank Project](https://www.cectank.com/sweden_glass_fused_to_steel_tanks): GFS anaerobic digestion tanks delivered for a Swedish biogas and wastewater treatment facility.
- [Saudi Arabia Treated Sewage Water Storage](https://www.cectank.com/saudi_arabia_glass_fused_to_steel_tanks): GFS tanks for treated sewage effluent storage and reuse in Saudi Arabia.
- [Philippines Potable Water Project](https://www.cectank.com/philippines_glass_fused_to_steel_tanks): GFS potable water storage tanks installed for a Philippines water utility project.
- [Malaysia Biogas Project](https://www.cectank.com/malaysia_glass_fused_to_steel_tanks): GFS tanks used in a Malaysian biogas plant, showing gas-tight digestion and storage.
- [Namibia Fresh Water Storage Project](https://www.cectank.com/namibia_glass_fused_to_steel_tanks): Fresh water storage GFS tanks delivered for Namibia water infrastructure.
- [AB InBev WWTP Project in Mozambique](https://www.cectank.com/mozambique_glass_fused_to_steel_tanks): Stainless and GFS tanks used in brewery wastewater treatment for AB InBev Mozambique.
- [France Corn Granary Project](https://www.cectank.com/france_glass_fused_to_steel_tanks): GFS tanks used as corn and grain silos in a French agricultural granary operation.
- [Colombia Drinking Water Project](https://www.cectank.com/colombia_glass_fused_to_steel_tanks): GFS drinking water tanks installed in a highland Colombian water supply project.

## Engineering Standards & Technical Guides
- [Glass-Fused-to-Steel Technology](https://www.cectank.com/glass-fused-to-steel-technology): Explains the GFS coating process, fusion temperature, chemical bond and resulting corrosion barrier.
- [AWWA D103-09 Design Standards](https://www.cectank.com/AWWA_D103_09_Design_Standards): Engineering guide to AWWA D103-09 for factory-coated bolted steel water storage tanks.
- [ISO 28765 Standard](https://www.cectank.com/ISO_28765_Standard): Testing and compliance guide for vitreous enameled bolted steel tanks under ISO 28765.
- [NSF/ANSI 61 Glass-Fused-to-Steel Tanks](https://www.cectank.com/NSF61_Glass_Fused_to_Steel_Tanks): Explains NSF/ANSI 61 compliance for potable water GFS tanks and system-level testing requirements.
- [NFPA 22 Standard for Water Tanks](https://www.cectank.com/NFPA_22_Standard_for_Water_Tanks): Complete guide to NFPA 22 requirements for private fire protection water storage tanks.
- [What Is a Bolted Tank?](https://www.cectank.com/What_Is_a_Bolted_Tank): Covers bolted tank engineering, design principles, materials and applications across municipal, industrial and agricultural sectors.
- [Glass-Fused-to-Steel Tanks: The Definitive Engineering Guide](https://www.cectank.com/Glass_Fused_to_Steel_Tanks_Engineering_Guide): Explains GFS material science, manufacturing, standards compliance and storage applications.
- [What Is a GFS Tank?](https://www.cectank.com/What_Is_a_GFS_Tank): Introductory guide to GFS tank construction, glass-steel bonding and industrial use cases.
- [UASB Reactor Technology](https://www.cectank.com/UASB_Reactor): Describes upflow anaerobic sludge blanket reactors for high-strength industrial wastewater treatment.
- [Biogas Digester: Anaerobic Digestion Explained](https://www.cectank.com/Anaerobic_Digestion): Explains the anaerobic digestion process and biogas digester tank design for waste-to-energy projects.

## Company & Support
- [About Us](https://www.cectank.com/glass-fused-to-steel-tanks-manufacturer): Introduces Shijiazhuang Zhengzhong Technology Co., Ltd. and its history as a global bolted tank manufacturer since 1989.
- [Quality Control](https://www.cectank.com/quality-control): Describes inspection and testing protocols used in panel manufacturing, including coating thickness and edge quality checks.
- [Production Steps](https://www.cectank.com/production-steps): Walks through the factory process from steel coil to finished enameled panels.
- [Certifications](https://www.cectank.com/glass-fused-to-steel-tanks-certifications): Lists AWWA D103, ISO 28765, NSF/ANSI 61, NFPA 22, CE, WRAS and other approvals held by Center Enamel.
- [Services](https://www.cectank.com/service-2019): Outlines engineering, installation, after-sales support, and turnkey project services.
- [EPC Technical Support](https://www.cectank.com/tank-ancillaries): Describes ancillary supply and technical support for EPC contractors, including tank accessories and installation guidance.
- [Resource & Download](https://www.cectank.com/resource): Provides downloadable brochures, datasheets and technical literature for tank systems.
- [News](https://www.cectank.com/news): Publishes company announcements, industry insights and project deployment updates.
- [Contact](https://www.cectank.com/contact): Provides email, phone and submission forms for sales inquiries and project consultations.
- [Request a Quote](https://www.cectank.com/request-quote): Lets buyers submit tank specifications to receive a quotation from the sales team.