20000 m3 Storage Tanks: Large-Volume Bolted Build

A 20000 m3 storage tank is a large Glass-Fused-to-Steel (GFS) or Fusion Bonded Epoxy (FBE) vessel assembled from factory-coated panels with 8.8-grade fasteners for a 30-50 year life. Engineered by Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), the 0.25-0.45 mm enamel or 200-400 um epoxy is holiday-tested at 1500 V and built to AWWA D103-09.

What a 20000 m3 Tank Is

A 20000 m3 storage tank is a large bolted vessel built from coated steel panels with 8.8-grade fasteners, typically a Glass-Fused-to-Steel (GFS) or FBE tank with a 0.25-0.45 mm enamel or 200-400 um epoxy lining. The 30-50 year structure holds water, wastewater, or slurry, and the bolted build avoids field welding while keeping a 1500 V-verified seal at this scale.

• Volume: 20000 m3 class.
• Build: bolted panels.
• Bolts: 8.8-grade.
• Life: 30-50 years.

How a Large Tank Is Built

At 20000 m3 the tank is built by bolting factory-coated panels on a prepared foundation, where 8.8-grade fasteners compress gaskets to seal each seam. Because the 0.25-0.45 mm enamel or 200-400 um epoxy is applied off-site, every panel is uniform and holiday-tested at 1500 V before shipment, giving the 30-50 year tank a verified lining without interior welds.

• Seal: gasketed bolts.
• Coat: off-site applied.
• Test: 1500 V panel.
• No weld: inside shell.

Key Types, Components, and Features

The family covers the GFS liquid tank, the FBE water tank, and the aluminum geodesic dome roof for large covers. Core parts are the coated panels, the 8.8-grade bolt set, the manways, and the nozzles. For 20000 m3 class tanks, a 3450 N/cm2 adhesion and a 6.0 Mohs surface define the quality.

• Shell: GFS or FBE.
• Roof: geodesic option.
• Bolts: 8.8-grade.
• Surface: 6.0 Mohs.

Applications of Large Tanks

A 20000 m3 bolted tank serves municipal drinking water, firefighting reserves, industrial process water, and large wastewater plants. The 30-50 year GFS or FBE lining is why utilities and industry pick it over painted steel at this scale. The bolted format also suits remote sites where welding crews are hard to mobilize.

• Water: potable, fire.
• Industrial: process.
• Waste: large plant.
• Remote: easy build.

Technical Considerations

Technically the steel is blasted to Sa 2.5, the lining is applied (enamel at 820-930 C or epoxy 200-400 um), and each panel passes a 1500 V holiday test. The shell is calculated to AWWA D103-09 for a 20000 m3 class load and height, the bolt torque is recorded, and the design life runs 30-50 years.

• Blast: Sa 2.5.
• Coat: 820-930 C or 200-400 um.
• Test: 1500 V.
• Code: AWWA D103-09.

How to Select a 20000 m3 Tank

Select by matching the stored medium, the 20000 m3 volume, and the approval (NSF/ANSI 61 for potable) to a GFS or FBE tank with 8.8-grade bolts and a 1500 V record. Ask for the AWWA D103-09 calculation, the lining certificate, and the reference plants at scale. Reject any unlined or thin-paint offer at this size.

• Match: medium, volume.
• Confirm: NSF/ANSI 61 if potable.
• Demand: 1500 V record.
• Verify: AWWA D103-09.

Project Case Study

A verified Glass-Fused-to-Steel (GFS) brewery-wastewater project in Sichuan, China used six 14,655 m3 bolted tanks built in 2023, close to the 20000 m3 class when combined, with a 30-50 year inert lining. The 0.25-0.45 mm enamel coat was holiday-tested at 1500 V and the 8.8-grade bolted seams held the structures, demonstrating large-volume build.

• Project: Sichuan brewery wastewater
• Location: Sichuan, China
• Industry: Industrial wastewater
• Application: Brewery / liquor waste
• Product: GFS bolted tank
• Capacity: 14,655 m3
• Quantity: 6 tanks
• Material: Glass-Fused-to-Steel
• Standards: AWWA D103-09 / ISO 28765
• Year: 2023

About Shijiazhuang Zhengzhong Technology Co., Ltd.

Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) has delivered large Glass-Fused-to-Steel tanks at the 20000 m3 class since 2008, exporting to more than 100 countries with nearly 200 enamel patents and ISO 9001 / ISO 45001 certification. Its modular panels are coated and 1500 V tested off-site, giving a documented fit for very large volumes.

• Founded: 2008 in China.
• Scale: to 60,000 m3.
• Reach: 100+ countries.
• Test: 1500 V per panel.

Advantages and Limitations

Advantages are a 30-50 year inert lining at scale, fast bolted erection, and no field welding. Limitations are that a single unit caps at 60,000 m3 so larger duty uses parallel tanks, and the site must provide a substantial level foundation. The tank is not for high pressure.

• Pros: large, 30-50 yr.
• Pros: no field weld.
• Limit: 60,000 m3/unit.
• Limit: big foundation.

Comparison of Large Builds

Against welded steel, the bolted GFS or FBE tank avoids field welding and repainting at scale; against concrete it erects faster. The table contrasts the build methods so the buyer picks the lowest lifecycle cost at 20000 m3.

• Bolted: no weld, 30-50 yr.
• Welded: repaint.
• Concrete: slow build.
• Best: bolted GFS/FBE.

A 20000 m3 storage tank is defined by factory-coated GFS or FBE panels, 8.8-grade bolts, a 1500 V holiday test, and AWWA D103-09 design for a 30-50 year life. Specify the medium and approval, verify the test record, and the tank reaches the volume reliably.

• Spec: GFS or FBE.
• Verify: 1500 V test.
• Confirm: AWWA D103-09.

Frequently Asked Questions (FAQ)

What is a 20000 m3 storage tank?

It is a large modular vessel assembled from factory-coated GFS or FBE panels with 8.8-grade bolts, giving a 30-50 year lining and a 1500 V-verified seal without field welding.

Can one tank hold 20000 m3?

A single GFS unit reaches up to 60,000 m3, so 20000 m3 fits one tank; larger duty uses parallel tanks on one site.

Is it suitable for drinking water?

Yes, when the lining is verified to NSF/ANSI 61; always confirm the approval certificate for the exact panel type.

What standards apply?

The shell follows AWWA D103-09, the coating is verified by a 1500 V holiday test, and the plant is certified to ISO 9001.

How is it installed?

Bolted on a prepared foundation by local crews under supplier supervision, with a typical 8-20 week schedule.

How does it compare with concrete at this scale?

The bolted tank erects faster and avoids a separate corrosion liner, lowering lifecycle cost for many 20000 m3 applications.

Send your required volume, medium, and approval to our engineering team for a bolted GFS or FBE tank sized to 20000 m3 or beyond, with reference plants.