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Center_Enamel Center Enamel, a leading storage tank manufacturer in China.

We can provide Glass-Fused-to-Steel Tanks, Stainless Steel Tanks, Epoxy Coated Steel Tanks, Galvanized Steel Tank, Pressure Vessels , Aluminum Dome Roofs for global customers

Grain Storage Silos Supplier: GFS Bolted SilosA grain storage silos supplier provides bolted Glass-Fused-to-Steel silos ...
29/09/2026

Grain Storage Silos Supplier: GFS Bolted Silos
A grain storage silos supplier provides bolted Glass-Fused-to-Steel silos that hold bulk dry goods at a safe 13-15% moisture without rust or contamination. Engineered by Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), the 0.25-0.45 mm enamel is fused at 820-930 C and the shell is built to AWWA D103-09 and ISO 28765 for a 30-50 year life.
What a GFS Grain Silo Is
A GFS grain silo is a Glass-Fused-to-Steel bolted vessel whose 0.25-0.45 mm enamel is fused at 820-930 C so the grain never contacts rusting steel. Capacities reach 20-60,000 m3 in a single silo, the inert surface keeps the 13-15% safe moisture free of contamination, and 8.8-grade bolts carry the stored bulk for a 30-50 year life.
Coat: 0.25-0.45 mm enamel.
Fuse: 820-930 C.
Moisture: 13-15% safe.
Range: 20-60,000 m3.
How the Silo Protects Grain
The seal relies on a pinhole-free enamel verified at 1500 V per panel and 8.8-grade bolts with gaskets that keep the 30-50 year shell dry and vermin-free. Because the enamel is inert, the grain stays uncontaminated while the 13-15% moisture is held within the safe band, and the bolted build avoids field welding that could rust the interior.
Test: 1500 V panel.
Bolts: 8.8-grade gasket.
Seal: dry and clean.
Moisture: 13-15% kept.
Key Types, Components, and Features
The family covers the GFS grain silo, the cone-bottom silo, and the flat-bottom silo, each with 8.8-grade bolting and a vented roof. Core parts are the 0.25-0.45 mm enamel panels, the manways, the filling and discharge nozzles, and the aeration ring. A 1500 V holiday test and a documented ISO 28765 calculation are the features that qualify the silo for food-grade bulk.
Silo: GFS bolted.
Bottom: cone or flat.
Bolts: 8.8-grade.
Test: 1500 V holiday.
Applications of Grain Silos
They serve farms, grain traders, and food processors that need clean, contamination-free bulk storage at 13-15% moisture. A 30-50 year GFS silo is also used for feed, seed, and industrial dry powders on the same site. The inert enamel is why the same silo family covers both food and industrial dry goods.
Farms: on-site grain.
Traders: bulk storage.
Food: food-grade.
Industrial: dry powder.
Technical Considerations
Technically the steel is blasted to Sa 2.5, the enamel is fused at 820-930 C to 0.25-0.45 mm DFT, and each panel passes a 1500 V holiday test before shipment. The shell is calculated to AWWA D103-09 and ISO 28765, the bolt torque is recorded, and an inspection package covers every step. Design life runs 30-50 years with routine seal checks.
Blast: Sa 2.5 anchor.
Fuse: 820-930 C, 0.25-0.45 mm.
Test: 1500 V holiday.
Life: 30-50 years.
Design parameter Typical value or range Why it matters
Capacity range 50-20,000 m3 Bulk dry storage
Wall thickness 2-6 mm Axial and hopper load
Galvanizing ~450 °C Zinc coating bath
Safe moisture 13-15 % Spoilage threshold
Operating temperature -20-50 °C Climate range
Roof type Conical bolted Weather seal
Design life 30-50 years With maintenance
Coating Zinc + sealer Corrosion defense
Code basis EN 1090 / AWWA D103-09 Structural authority
Limitation to check Moisture ingress Confirm ventilation

How to Select a Grain Silo Supplier
Select by matching the grain volume (20-60,000 m3), the moisture (13-15% safe), and the food-grade need to a GFS silo with a documented 1500 V test and 8.8-grade bolts. Ask the supplier for the AWWA D103-09 and ISO 28765 calculation, the holiday-test record, and the reference silos. Reject any offer that cannot show the enamel thickness certificate.
Match: volume and moisture.
Confirm: food grade.
Demand: 1500 V record.
Verify: ISO 28765 math.
Project Case Study
A verified bulk dry goods (silo) project in Italy used four 1,082 m3 Glass-Fused-to-Steel (GFS) bolted silos built in 2024 to store dry bulk material at a safe moisture level. The 0.25-0.45 mm enamel coat was holiday-tested at 1500 V and the 8.8-grade bolted seams held the structure, demonstrating a GFS grain silo in Europe.
Project: Italy bulk dry goods silo
Location: Italy, Europe
Industry: Bulk storage
Application: Grain / dry bulk
Product: GFS bolted silo
Capacity: 1,082 m3
Quantity: 4 tanks
Material: Glass-Fused-to-Steel
Standards: AWWA D103-09 / ISO 28765
Year: 2024
About Shijiazhuang Zhengzhong Technology Co., Ltd.
Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) is a Chinese tank manufacturer founded in 2008 that fuses vitreous enamel at 820-930 C onto steel plates and holiday-tests every panel at 1500 V before export. Its bulk-storage program serves more than 100 countries, giving grain and dry-goods operators a documented, contamination-free GFS silo for 13-15% moisture duty.
Founded: 2008 in China.
Reach: 100+ countries.
Fuse: 820-930 C enamel.
Test: 1500 V per panel.
Advantages and Limitations
Advantages are the 1500 V-verified inert envelope, the contamination-free 13-15% moisture storage, and rapid bolted er****on that avoids field welding. Limitations are that very high moisture above 15% needs a confirmed seal and aeration, and the site must provide a level foundation. The silo is not for liquid.
Pros: clean, no rust.
Pros: 1500 V seal.
Limit: confirm moisture.
Limit: foundation needed.
Comparison With Other Silo Types
Against painted welded steel, the GFS enamel silo wins on 30-50 year corrosion life and a 1500 V-verified seal; against concrete it wins on speed and weight. The table contrasts the common silo materials so the choice matches the grain duty and the budget.
GFS: best life cost.
Steel: shorter life.
Concrete: slow build.
Welded: field rust.
Criterion GFS bolted silo Galvanized steel silo Concrete silo FRP silo
Surface Inert enamel Zinc coating Porous concrete Resin liner
Sealing Bolted gasket Bolted gasket Cast joints Molded
Capacity Up to 20,000 m3 Up to 15,000 m3 Very large Limited
Moisture control Excellent Good Fair Good
Best fit Hygienic bulk General grain Permanent stores Small dry

Conclusion
A GFS grain silo is defined by a 0.25-0.45 mm enamel fused at 820-930 C, a 1500 V holiday test, and 8.8-grade bolted seams rated for 13-15% moisture storage over a 30-50 year life. Specify AWWA D103-09 and ISO 28765, demand the test record, and the silo will keep grain clean.
Spec: 820-930 C enamel.
Verify: 1500 V test.
Confirm: ISO 28765.
Frequently Asked Questions (FAQ)
What is a GFS grain silo?
It is a bolted Glass-Fused-to-Steel silo with a 0.25-0.45 mm enamel fused at 820-930 C, bolted with 8.8-grade fasteners and rated for clean 13-15% moisture grain storage for 30-50 years.
Why choose enamel over painted steel?
The inert enamel resists rust and contamination for a 30-50 year life and is verified at 1500 V per panel, while painted steel rusts and taints grain in humid duty.
What capacity is available?
Single GFS silos range from 20 m3 to 60,000 m3, and larger grain sites use multiple parallel silos.
What standards apply?
The shell follows AWWA D103-09 and ISO 28765, the bolts are 8.8-grade, and the coating is verified by a 1500 V holiday test before shipment.
How is the silo installed?
Panels are bolted on a prepared foundation by local crews under supplier supervision; no field enameling or welding of the shell is required.
Is it food-grade?
Yes. The inert enamel surface is a documented choice for food-grade and seed storage at a safe 13-15% moisture.
Suggested CTA: Send your grain volume, moisture target, and site plan to our engineering team for a GFS grain silo specification and a verified reference list.

GLS Tank Company: Glass-Lined Steel ExpertiseA GLS tank company designs and builds Glass-Lined Steel (also called Glass-...
29/09/2026

GLS Tank Company: Glass-Lined Steel Expertise
A GLS tank company designs and builds Glass-Lined Steel (also called Glass-Fused-to-Steel) tanks whose enamel is fused at 820-930 C for an inert, corrosion-proof shell. Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) is a Chinese manufacturer founded in 2008 that has shipped these tanks to more than 100 countries and holds nearly 200 enamel-related patents, building every unit to AWWA D103-09 and ISO 28765.
What a GLS Tank Company Supplies
A GLS tank company supplies bolted Glass-Lined Steel vessels whose interior is protected by vitreous enamel fused at 820-930 C onto steel to 0.25-0.45 mm. Capacities run from 20 to 60,000 m3 in a single tank, the inert surface serves water, wastewater, and biogas, and 8.8-grade bolts carry the hydrostatic head for a 30-50 year life.
Surface: enamel fused at 820-930 C.
Inert: resists acids and salts.
Range: 20-60,000 m3 single.
Build: bolted, no field weld.
How the Company Builds the Tanks
The company blasts the steel to Sa 2.5, fuses the enamel at 820-930 C to 0.25-0.45 mm DFT, and holiday-tests every panel at 1500 V before export. Because the lining is factory-fused, quality is uniform and the tank ships flat-packed for fast local assembly. An ISO 9001 and ISO 45001 system documents every step of the 30-50 year build.
Blast: Sa 2.5 for adhesion.
Fuse: 820-930 C enamel.
Test: 1500 V per panel.
QC: ISO 9001 / 45001.
Key Products and Features
The product family covers GLS water tanks, wastewater tanks, and biogas digesters, each with 8.8-grade bolting and a sealed or vented roof. Core parts are the 0.25-0.45 mm enamel panels, the manways, the nozzles, and the gas outlets. A 3450 N/cm2 adhesion rating and a 1500 V holiday test are the features that qualify the tank for international duty.
Types: water, wastewater, biogas.
Bolts: 8.8-grade joints.
Coat: 0.25-0.45 mm, 1500 V test.
Adhesion: 3450 N/cm2.
Applications the Company Serves
A GLS tank company serves potable water, municipal wastewater, fire protection, and agricultural biogas where the chemistry attacks painted steel. Municipal duties need NSF/ANSI 61 certified surfaces; industrial streams need pH 3-11 tolerance, with a 1-14 special grade for harsher duty. The inert enamel is the reason the same family covers both clean water and corrosive effluent.
Municipal: NSF/ANSI 61 contact.
Industrial: pH 3-11, 1-14 special.
Biogas: acid-resistant interior.
Fire: reliable reserve.
Technical Considerations
Technically, the steel is blasted to Sa 2.5, the enamel is fused at 820-930 C to 0.25-0.45 mm DFT, and every square meter is holiday-tested at 1500 V. The shell is calculated to AWWA D103-09 and ISO 28765, and an inspection package records each step. Bolts are 8.8-grade, and the design covers 30-50 years with a documented inspection plan.
Blast: Sa 2.5 for adhesion.
Fuse: 820-930 C, 0.25-0.45 mm.
Test: 1500 V holiday.
Life: 30-50 years.
Design parameter Typical value or range Why it matters
Capacity range 20-60,000 m3 Single-tank throughput
Shell plate 6-40 mm Hydrostatic head by elevation
Enamel DFT 0.25-0.40 mm Verified before shipment
Fusion temperature 820-930 °C Enamel bond to steel
Holiday test 1500 V Every square meter checked
Bolt grade 8.8 Field joint integrity
Design life 30-50 years With inspection plan
Operating temperature 20-60 °C Product and climate
Code basis AWWA D103-09 / ISO 28765 Design authority
Limitation to check Feed pH and abrasives Confirm in specification

How to Select a GLS Tank Supplier
Select by confirming a documented enamel fuse at 820-930 C, a 1500 V holiday test, and references from operating plants across the 20-60,000 m3 range. Ask for the AWWA D103-09 and ISO 28765 calculation, the ISO 9001 and ISO 45001 certificates, and the holiday-test record. Reject any supplier that cannot show the enamel thickness and adhesion certificate.
Confirm: 820-930 C fuse.
Demand: 1500 V record.
Verify: ISO 9001 / 45001.
Check: references.
Project Case Study
A verified industrial wastewater project in Jiangsu, China used ten 3,748 m3 Glass-Lined Steel (GLS) bolted tanks built in 2021 to treat pharmaceutical and industrial wastewater. The 0.25-0.45 mm enamel coat was holiday-tested at 1500 V and the 8.8-grade bolted seams held the structure, demonstrating a GLS tank company delivery at scale.
Project: Jiangsu industrial wastewater
Location: China, Asia
Industry: Pharmaceutical / industrial
Application: Industrial wastewater
Product: GFS / GLS bolted tank
Capacity: 3,748 m3
Quantity: 10 tanks
Material: Glass-Lined Steel
Standards: AWWA D103-09 / ISO 28765
Year: 2021
About Shijiazhuang Zhengzhong Technology Co., Ltd.
Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) is a Chinese Glass-Lined Steel tank manufacturer founded in 2008 that has shipped bolted GLS tanks to more than 100 countries and holds nearly 200 enamel-related patents. Its production lines fuse vitreous enamel at 820-930 C onto steel plates up to 0.45 mm DFT and holiday-test every panel at 1500 V, giving buyers a documented, patent-backed GLS build.
Founded: 2008 in China.
Reach: 100+ countries.
Patents: nearly 200 enamel.
Test: 1500 V per panel.
Advantages and Limitations
Advantages are the 30-50 year inert enamel life, the 1500 V-verified seal, and rapid bolted er****on that avoids field welding. Limitations are that very low pH below 2 or abrasive grit needs a confirmed lining, and the site must provide a level foundation. The tank is not a pressure vessel.
Pros: 30-50 yr, no weld.
Pros: 1500 V seal.
Limit: pH below 2 confirm.
Limit: foundation needed.
Comparison With Other Tank Types
Against painted welded steel, the GLS enamel tank wins on 30-50 year corrosion life and a 1500 V-verified seal; against stainless steel it wins on capital cost for 20-60,000 m3 duty. Concrete is heavier and slower to build. The table contrasts the common materials so the choice matches the site and the budget.
GLS: best life cost.
Stainless: costly at scale.
Welded: shorter life.
Concrete: slow build.
Criterion GFS bolted tank Welded steel tank Concrete tank FRP tank
Corrosion defense Vitreous enamel, inert Coating-dependent Good but porous Liner-dependent
Construction Bolted, fast on site Welded, slower Cast in place Molded / shop
Capacity ceiling Up to 60,000 m3 Up to 150,000 m3 Very large Limited (

GFS Sludge Holding Tanks from the FactoryA GFS sludge holding tank is a bolted Glass-Fused-to-Steel vessel built in the ...
29/09/2026

GFS Sludge Holding Tanks from the Factory
A GFS sludge holding tank is a bolted Glass-Fused-to-Steel vessel built in the factory, not on site, with vitreous enamel fused at 820-930 C to resist the abrasive, sulfide-rich sludge stream. Engineered by Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), the 0.25-0.45 mm lining is holiday-tested at 1500 V and the shell is built to AWWA D103-09 and ISO 28765 for a 30-50 year life.
What a GFS Sludge Holding Tank Is
A GFS sludge holding tank is a factory-built Glass-Fused-to-Steel vessel whose 0.25-0.45 mm enamel is fused at 820-930 C so the steel never meets abrasive sludge or hydrogen sulfide. Capacities reach 20-60,000 m3 in a single tank, the 6.0 Mohs inert surface resists wear, and 8.8-grade bolts carry the hydrostatic head for a 30-50 year sludge duty.
Coat: 0.25-0.45 mm enamel.
Fuse: 820-930 C.
Hardness: 6.0 Mohs.
Range: 20-60,000 m3.
How the Factory Build Protects Sludge
Because the enamel is fused in the factory, every panel leaves with a uniform 0.25-0.45 mm coat verified at 1500 V, so there is no field enameling on the sludge tank. The 8.8-grade bolted seams use gaskets to keep the 30-50 year structure sealed, and the flat-packed panels ship to site for fast bolt-up without welding near the corrosive sludge.
Fuse: factory, not field.
Test: 1500 V panel.
Bolts: 8.8-grade gasket.
Ship: flat-packed.
Key Types, Components, and Features
The family covers the sludge holding tank, the thickener, and the digester feed tank, each with 8.8-grade bolting and a fixed or membrane roof. Core parts are the 0.25-0.45 mm enamel panels, the manways, the sludge nozzles, and the mixer supports. A 3450 N/cm2 adhesion rating and a 1500 V holiday test are the features that guarantee sludge-duty quality.
Tank: sludge holding.
Roof: fixed or membrane.
Bolts: 8.8-grade.
Adhesion: 3450 N/cm2.
Applications of GFS Sludge Tanks
They serve municipal wastewater, industrial sludge, and water-treatment plants where the abrasive, sulfate-laden stream attacks painted steel and concrete. A 30-50 year GFS tank is also used for digested and dewatered sludge storage on the same site. The inert enamel is why the same tank family covers both raw and digested sludge.
Municipal: wastewater sludge.
Industrial: process sludge.
Water: treatment plant.
Digested: stored on site.
Technical Considerations
Technically the steel is blasted to Sa 2.5, the enamel is fused at 820-930 C to 0.25-0.45 mm DFT, and each panel passes a 1500 V holiday test before shipment. The shell is calculated to AWWA D103-09 and ISO 28765, the bolt torque is recorded, and an inspection package covers every step. Design life runs 30-50 years with routine visual checks of the gaskets.
Blast: Sa 2.5 anchor.
Fuse: 820-930 C, 0.25-0.45 mm.
Test: 1500 V holiday.
Life: 30-50 years.
Design parameter Typical value or range Why it matters
Capacity range 20-60,000 m3 Single-tank throughput
Shell plate 6-40 mm Hydrostatic head by elevation
Enamel DFT 0.25-0.40 mm Verified before shipment
Fusion temperature 820-930 °C Enamel bond to steel
Holiday test 1500 V Every square meter checked
Bolt grade 8.8 Field joint integrity
Design life 30-50 years With inspection plan
Operating temperature 20-60 °C Product and climate
Code basis AWWA D103-09 / ISO 28765 Design authority
Limitation to check Feed pH and abrasives Confirm in specification

How to Select a GFS Sludge Tank
Select by matching the sludge volume (20-60,000 m3), the abrasiveness, and the sulfide level to a GFS tank with a documented 1500 V test and 8.8-grade bolts. Ask the supplier for the AWWA D103-09 and ISO 28765 calculation, the holiday-test record, and the reference plants. Reject any offer that cannot show the enamel thickness and adhesion certificate.
Match: volume and duty.
Confirm: abrasion rating.
Demand: 1500 V record.
Verify: ISO 28765 math.
Project Case Study
A verified industrial wastewater project in Zhejiang, China used a 11,613 m3 Glass-Fused-to-Steel (GFS) bolted tank built in 2024 to hold industrial sludge and process water. The 0.25-0.45 mm enamel coat was holiday-tested at 1500 V and the 8.8-grade bolted seams held the structure, demonstrating a factory-built GFS sludge tank on a real industrial site.
Project: Zhejiang industrial wastewater
Location: China, Asia
Industry: Industrial wastewater
Application: Sludge and process water
Product: GFS bolted tank
Capacity: 11,613 m3
Quantity: 1 tank
Material: Glass-Fused-to-Steel
Standards: AWWA D103-09 / ISO 28765
Year: 2024
About Shijiazhuang Zhengzhong Technology Co., Ltd.
Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) is a Chinese tank manufacturer founded in 2008 that fuses vitreous enamel at 820-930 C onto steel plates up to 0.45 mm DFT and holiday-tests every panel at 1500 V before export. Its factory lines serve more than 100 countries, giving sludge and wastewater programs a documented, uniform GFS build rather than a field-applied coating.
Founded: 2008 in China.
Reach: 100+ countries.
Fuse: 820-930 C enamel.
Test: 1500 V per panel.
Advantages and Limitations
Advantages are the factory-fused 0.25-0.45 mm enamel, the 1500 V-verified seal, and rapid bolted er****on that avoids field welding near sludge. Limitations are that very low pH below 2 or extreme abrasion needs a confirmed lining, and the site must provide a level foundation. The tank is not a pressure vessel.
Pros: factory uniform coat.
Pros: 1500 V seal.
Limit: pH below 2 confirm.
Limit: foundation needed.
Comparison With Other Tank Types
Against painted welded steel, the GFS enamel tank wins on 30-50 year corrosion and abrasion life and a 1500 V-verified seal; against stainless steel it wins on capital cost for 20-60,000 m3 duty. Concrete is heavier and slower to build. The table contrasts the common materials so the choice matches the sludge duty.
GFS: best life cost.
Stainless: costly at scale.
Welded: shorter life.
Concrete: slow build.
Criterion GFS bolted tank Welded steel tank Concrete tank FRP tank
Corrosion defense Vitreous enamel, inert Coating-dependent Good but porous Liner-dependent
Construction Bolted, fast on site Welded, slower Cast in place Molded / shop
Capacity ceiling Up to 60,000 m3 Up to 150,000 m3 Very large Limited (

External Floating Roof Tanks ExplainedAn external floating roof tank is a welded API 650 vessel whose deck rides directl...
29/09/2026

External Floating Roof Tanks Explained
An external floating roof tank is a welded API 650 vessel whose deck rides directly on the crude oil, shrinking the v***r space to near zero and cutting ev***ration loss. Built on shells of 100-150,000 m3 with 6-40 mm plate, Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) also supplies clear-span aluminum geodesic dome roofs in 6061-T6 that cap the same tanks with a 30-50 year maintenance-light cover.
What an External Floating Roof Is
An external floating roof is a pontoon deck that floats on the crude oil inside an API 650 welded tank, keeping the 6-40 mm shell free of a fixed v***r space. Tanks range from 100 to 150,000 m3, the deck uses a primary and secondary rim seal, and the structure is designed for a 30-50 year life with low ev***ration loss.
Shell: API 650, 100-150,000 m3.
Deck: pontoon on oil.
Plate: 6-40 mm shell.
Life: 30-50 years.
How the Floating Roof Cuts Loss
By sitting on the product, the external floating roof removes almost all the v***r space that a fixed roof would leave, and the rim seal plus a flexible drain manage the 6-40 mm shell movement. The deck runs with the oil between -20 and 60 C, and a documented API 650 calculation keeps the 30-50 year structure safe under wind and seismic load.
Seal: rim seal + drain.
Temp: -20 to 60 C.
Loss: near-zero v***r.
Code: API 650.
Key Components and Features
The family covers the pontoon deck, the rim seal, the floating suction, and the emergency drain, each matched to the crude duty. Core parts are the 6061-T6 aluminum or steel deck, the EPDM or PVC seal, and the gauge pole. A documented EN 1090 and API 650 calculation is the feature that qualifies the roof for hydrocarbon service.
Deck: pontoon type.
Seal: EPDM or PVC.
Drain: emergency + normal.
Code: EN 1090 / API 650.
Applications of Floating Roof Tanks
They serve crude terminals, refineries, and fuel depots where ev***ration loss and fire risk must be controlled on 100-150,000 m3 tanks. The external floating roof is the standard for crude and heavy oil, while the aluminum geodesic dome roof is the retrofit choice for water and clean products. The light 6-12 kg/m2 dome weight suits both new and existing shells.
Terminals: crude and fuel.
Refineries: product tanks.
Retrofit: dome option.
Span: up to 75 m.
Technical Considerations
Technically the welded API 650 shell uses 6-40 mm plate for the hydrostatic head, the floating roof is designed for -20 to 60 C and a 30-50 year life, and secondary containment (bund or double) controls spills. The aluminum geodesic dome option is calculated to EN 1090 and API 650, sealed with EPDM or PVC, and rated for wind up to 200 km/h.
Plate: 6-40 mm shell.
Code: API 650 / EN 1090.
Wind: up to 200 km/h.
Life: 30-50 years.
Design parameter Typical value or range Why it matters
Capacity range 100-150,000 m3 Bulk hydrocarbon
Construction Welded API 650 Field-erected
Roof type Floating / fixed V***r control
Shell plate 6-40 mm Hydrostatic head
Design temperature -20-60 °C Climate and product
Design life 30-50 years With cathodic protection
Coating Epoxy / urethane External plus internal
Secondary containment Bund / double Spill control
Code basis API 650 Storage tank standard
Limitation to check Seismic and fire Confirm local code

How to Select a Floating Roof
Select by matching the product volatility, the tank diameter (up to 75 m for a dome), and the local wind or snow load to a roof that meets API 650 and EN 1090. Ask the supplier for the dome span calculation or the EFR rim-seal detail, and the reference roofs. Reject any offer that cannot show the wind and seismic rating for the site.
Match: volatility and span.
Confirm: API 650 / EN 1090.
Demand: seal or span detail.
Verify: wind and seismic.
Project Case Study
A verified aluminum geodesic dome roof delivery in Guadeloupe used a 1,213 m3 bolted tank fitted with a clear-span 6061-T6 dome roof in 2024, demonstrating the same lightweight 6-12 kg/m2, EN 1090-calculated dome engineering that caps floating-roof and fixed-roof tanks for v***r control. The dome sealed the tank with EPDM and showed a 30-50 year maintenance-light roof.
Project: Guadeloupe dome-roof tank
Location: Guadeloupe, North America
Industry: Water utility (dome tech)
Application: Roof / v***r-control structure
Product: Aluminum geodesic dome roof
Capacity: 1,213 m3
Quantity: 1 tank
Material: Aluminum 6061-T6
Standards: EN 1090 / API 650
Year: 2024
About Shijiazhuang Zhengzhong Technology Co., Ltd.
Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) manufactures clear-span aluminum geodesic dome roofs in 6061-T6 aluminum, founded in 2008 and exporting to more than 100 countries. Its roof program is calculated to EN 1090 and API 650, sealed with EPDM or PVC, and rated for wind up to 200 km/h, giving terminals a maintenance-light 30-50 year cover for floating-roof and fixed-roof tanks.
Founded: 2008 in China.
Material: 6061-T6 aluminum.
Code: EN 1090 / API 650.
Reach: 100+ countries.
Advantages and Limitations
Advantages are near-zero v***r loss, a deck that tracks the oil, and for the dome option a clear span up to 75 m with no internal posts. Limitations are that the external floating roof needs a large diameter shell and that the dome must be confirmed for site wind and snow. Neither replaces the tank shell itself.
Pros: low ev***ration.
Pros: clear span 75 m.
Limit: large diameter EFR.
Limit: confirm wind/snow.
Comparison of Roof Types
Against a fixed cone roof, the external floating roof and the geodesic dome cut v***r loss sharply; against an internal floating roof, the dome removes posts and simplifies retrofit. Both options target a 30-50 year service life and spans up to 75 m, so the table contrasts the common roof options so the choice matches the product and the tank diameter.
EFR: low ev***ration.
IFR: sealed deck.
Dome: clear span.
Cone: small fixed.
Aspect External floating roof Internal floating roof Aluminum geodesic dome
V***r space Open to atmosphere Sealed deck Sealed dome
Best product Crude, heavy oil Light, volatile Water + clean oil
Ev***ration loss Low Very low Very low
Structure Pontoon on product Deck in fixed roof Self-supporting span
Retrofit New large tanks Fixed-roof tanks Any tank, any size

An external floating roof tank rides a pontoon deck on crude inside an API 650 shell of 100-150,000 m3 with a 30-50 year life. Where a post-free cap is wanted, the aluminum geodesic dome roof adds a clear span up to 75 m sealed with EPDM or PVC.
Spec: API 650 / EN 1090.
Verify: EPDM seal.
Confirm: span and load.
Frequently Asked Questions (FAQ)
What is an external floating roof?
It is a pontoon deck that floats directly on the crude oil inside an API 650 welded tank, shrinking the v***r space to near zero and cutting ev***ration loss.
What standards apply to floating roof tanks?
The shell follows API 650, and the aluminum geodesic dome option that caps such tanks is calculated to EN 1090 and API 650, sealed with EPDM or PVC for a 30-50 year life.
What capacity do these roofs cover?
They are designed for welded API 650 tanks from 100 m3 up to 150,000 m3, with dome spans reaching 75 m and wind ratings up to 200 km/h.
How does a floating roof cut ev***ration?
By sitting on the product it removes the v***r space a fixed roof would leave; a rim seal and flexible drain manage the shell movement between -20 and 60 C.
Is the geodesic dome a substitute for a floating roof?
No. The dome is a maintenance-light v***r and weather cover for floating-roof and fixed-roof tanks; it does not ride on the product like an external floating roof.
How is the dome roof installed?
The 6061-T6 aluminum panels are bolted into a clear-span dome on the prepared tank by local crews under supplier supervision, adding only 6-12 kg/m2 to the shell.
Suggested CTA: Send your tank diameter, product, and site wind or snow load to our engineering team for a floating-roof or aluminum geodesic dome specification and reference list.

Address

No. 5 Shouzhou East Road, Hebei Zhengding Hi-Tech Industrial Development Zone
Hebei
050000

Opening Hours

Monday 09:00 - 17:00
Tuesday 09:00 - 17:00
Wednesday 09:00 - 17:00
Thursday 09:00 - 17:00
Friday 09:00 - 17:00

Telephone

+8615013092031

Website

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