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Fuel storage is critical to your operation. Your tank must be safe, compliant, and ready for heavy-duty performance.
Siegen builds AGT systems that protect your people, your site, and your long-term operations.
Why Choose Siegen Aboveground Tanks?
Engineered for the Demands of Heavy Industries — Built on API 650 Principles
Aboveground storage tanks must perform in the harshest environments — bulk plants, industrial sites, military bases, transport facilities, power generation, and airports.
Siegen uses historically proven steel engineering, precision fabrication, and international standards to create AGTs that are dependable, safe, and cost-efficient.
✔ API 650 standard fabrication
✔ Compatible with petroleum products, diesel, and chemicals
✔ Safe for fuels with higher methanol/ethanol contents
✔ Built using A36 High Grade Mild Steel or Stainless Steel
✔ Available in single-wall and double-wall configurations
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.
Explore Our Work
Our Storage Projects
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
Orientation
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Horizontal and Vertical are available with an array of options that provide solutions for many applications and your specific needs.
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Supports, stabilizers, saddles and skids are available for permanent or temporary tank locating.
Available Tank Configurations & Options
Every project is unique—and your tank must match your environment and operational needs.
Configuration Options
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Horizontal AGT
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Vertical AGT
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Single-wall or Double-wall tanks
Support Structures for Any Application
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Standard saddle
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Skid-type saddle
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Stabilizers and skids for temporary or permanent installation