Aboveground storage tanks operate under demanding conditions—extreme heat, chemical exposure, heavy loads, and 24/7 operational pressure. A substandard tank is not just a liability. It's a danger.
Siegen builds AGTs using A36 high-grade mild steel and stainless steel, precision-rolled and welded using the double V-butt method for zero-compromise structural integrity. Every tank is finished with our 3-Point Japanese Method non-corrosive coating system and pressure-tested to 5 PSI before leaving our fabrication floor.
Why Siegen AGTs Stand Apart:
✔ API 650-compliant fabrication — the international gold standard
✔ Single-wall and double-wall configurations available
✔ Compatible with petroleum products, diesel, chemicals, and
ethanol blends
✔ Machine precision rolling for uniform curvature and shell quality
✔ Flat heads with strongback stiffeners for superior reinforcement
✔ Horizontal and vertical orientation options with saddles, skids,
and stabilizers
Brand Trust Section — Awards & Values
The Most Valuable Asset of SIEGEN Is Our People
We believe genuine commitment to our clients is only possible when we care deeply for the people who make our work possible—our employees, suppliers, partners, and investors.
This shared commitment creates the God-fearing, customer-centered service experience that only Siegen delivers.
Industry Recognition
🏆 Best Storage Tank Engineering Firm 2020 – South East Asia
Business Awards
🏅 Elite Leadership Award 2019
🏅 Elite Business Excellence Award 2019
These awards reflect our dedication to engineering quality, safety, and long-term reliability.
Aboveground storage tanks are engineered to meet the demanding needs of many industries, providing sensible and safe solutions for storing petroleum products and chemicals at bulk plants, transportation facilities, industrial sites, military bases, and airports.
Siegen Tank uses historically proven steel design and construction to provide high-performance and dependable storage tanks.
Tanks are manufactured to API 650 specifications using flat heads in single-wall and double-wall configurations. Constructed of A36 high-grade mild steel or stainless steel, they are compatible with the full range of petroleum products, including those with higher methanol and ethanol contents.
Standard Construction Features
Engineered with durability and long-term performance in mind.
✔ API 650 Labeled
Ensures standardized fabrication, material selection, and structural integrity.
✔ Flat Heads with Strongback Stiffeners
Provides superior reinforcement and structural stability.
✔ Machine Precision Rolling
Guarantees uniform curvature, shell quality, and proper tank alignment.
✔ Double V-Butt Welding
Deep penetration welds for superior strength and leak-free performance.
✔ 3-Point Japanese Method Non-Corrosive Coating System
High-performance protective coating that extends tank lifespan.
✔ 5 PSI Pressure Decay Test
Ensures tank integrity, leak prevention, and safety compliance.
Application
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Water Storage Tank
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Potable Water Storage Tank
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Fuel Storage Tank
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Diesel Storage Tank
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Oil Storage Tank
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Chemical Storage Tank
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Waste Storage Tank
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Fuel Day Tank for Gen-Set
Tank Capacity
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1,000 Liters
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5,000 Liters
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10,000 liters
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20,000 Liters
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30,000 Liters
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50,000 Liters
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100,000 Liters
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Custom Engineered Tanks.
© 2026 United Siegen Philippines Corp.
0917-878-2977 | 0921-718-0505 | Email: uspc@siegenphilippines.com