Large-scale crude oil storage tanks (≥100m³) are core oil depot equipment for storing crude oil and petroleum products. Composed of tank wall, roof, bottom and complete accessories, our tanks deliver long service life, excellent corrosion resistance, high temperature/pressure resistance and anti-scale performance. Widely used in oilfields, refineries and oil depots, all tanks comply with API and international petrochemical standards for safe and stable long-term storage.
We offer full customized tank solutions in capacity, pressure grade, anti-corrosion, insulation and accessories. Strict NDT and pressure testing ensure zero leakage and reliable quality.
1. Core Product Features
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API Standard Compliance – Follow API & petrochemical standards for stable, safe and globally applicable tank structure.
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Flexible Large Capacity – Custom volume 10–100,000m³, vertical/horizontal types for diverse site conditions.
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Premium Anti-Corrosion Performance – Multi-layer industrial coating, anti-rust and oil-resistant, adaptive to coastal and harsh environments.
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Complete Safety Configuration – Equipped with breathing valve, fire arrester, liquid level gauge, lightning and static protection for full safety.
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Anti-Condensation System – Optional heating and insulation layers to avoid crude oil condensation in low-temperature areas.
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Zero Leakage Design – Precise welding + full NDT inspection, reliable sealing for long-term fixed storage.
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Full Turnkey Service – Cover design, fabrication, on-site installation, commissioning and after-sales support.
2. Product Technical Specifications
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Applicable Medium: Crude oil, heavy crude oil and various petroleum products
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Volume Range: 10–100,000m³ (customized), large-scale tank starting from 100m³
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Structure Type: Vertical, horizontal, fixed-roof, floating-roof and spherical tanks
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Design Standard: API 650, API 620, API 12D, GB international standards
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Main Steel Grade: A537CL1, Q345R, 16MnDR, Q370R, S30408, A516 Grade 70/60, Q235B
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Working Pressure: Atmospheric pressure / customizable low pressure
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Working Temperature: -20℃ ~ +80℃
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Core Performance: Anti-corrosion, salt spray resistant, anti-scale, high temperature resistant
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Optional System: Heating, insulation, fire protection, automatic liquid level monitoring and full accessories
3. Tank Structure Classification & Professional API Standards System
We provide three mainstream tank structures: fixed-roof, floating-roof and spherical tanks. Fixed-roof tanks are cost-effective for medium and small storage projects; floating-roof tanks reduce oil volatilization and meet environmental standards for large reserve bases; spherical tanks offer superior pressure resistance for high-demand scenarios.
Our tanks adopt three authoritative API standards to match different pressure, temperature and project demands:
API standard detailed comparison is as follows:
|
Standard |
Core Application Scenarios |
Working Pressure |
Working Temperature |
Key Features & Advantages |
|
API 650 |
The most universal standard for welded atmospheric storage tanks; widely used in oilfields, refineries and conventional oil depots for storing crude oil, gasoline, chemicals and produced water. |
≤ 2.5 PSI (Atmospheric pressure type) |
Normal atmospheric working temperature |
Covers full processes of tank design, fabrication, welding, inspection and erection; high universality, stable structure and low maintenance cost, serving as the mainstream standard for global conventional crude oil storage projects. |
|
API 620 |
Large-diameter low-pressure steel storage tanks, applicable for special medium storage such as Liquefied Natural Gas (LNG) and high-pressure petroleum chemicals, suitable for super-large industrial storage projects. |
Up to 15 PSI (Higher than API 650) |
≤ 250°F |
Designed for ultra-large tanks (diameter over 300 feet); supports higher bearing pressure and stricter industrial storage demands, filling the technical gap of high-pressure medium storage that API 650 cannot cover. |
|
API 12D |
Specialized for field welded production liquid storage tanks, mainly adopted by upstream petrochemical and oilfield enterprises, matching field temporary and fixed oil storage projects. |
Standard customized design pressure & vacuum parameters |
Adaptable to field conventional working temperature |
Matched with shop-built tank standard API 12F; standardized tank dimensions, accessories and testing rules, no redundant secondary engineering design, shortens project cycle and reduces overall construction cost effectively. |
4. Application Scope
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Onshore & offshore oil field storage
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Refinery crude oil storage
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Port & terminal oil reserve projects
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Petrochemical industrial park facilities
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National & commercial oil reserve bases
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Energy enterprise supporting storage equipment
5. Our Advantages
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Professional Manufacturing – 10+ years of tank fabrication experience, strict quality control system.
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Global Project Experience – Served Middle East, Africa, Southeast Asia and South America energy projects.
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Free Custom Design – Tailor solutions per site condition, capacity and local standards.
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Rigorous Quality Control – Full NDT welding test, 100% hydraulic & air pressure test.
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One-Stop Turnkey Service – Design, production, installation and long-term after-sales support.
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Factory Direct Price – No middlemen, cost-effective with stable quality.
6. FAQ
Q1: What standards do your tanks adopt? A: Strictly follow API 650/620/12D and international petrochemical standards for global project acceptance.
Q2: Is customized service available? A: Yes, full customization on size, structure, heating, anti-corrosion and accessories.
Q3: Do you provide overseas installation? A: Yes, we offer overseas on-site guidance and full turnkey construction support.
Q4: What is the tank service life? A: 15–25 years under standard maintenance, adapting to various working environments.
