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EPV Tanks specializes in the engineering, design, and manufacturing of ASME Pressure Vessels and Tanks.

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API 650 Storage Solutions

CUSTOM FABRICATION OF API-650 STORAGE TANKS

Shop-built Annex J atmospheric tanks for oil, water, and chemicals across the USA and Canada.

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Our Core Offering: API-650 Atmospheric Storage Tanks

API-650 Atmospheric Storage Tanks are the global standard for large-volume liquid storage at atmospheric pressure. At "EPV Tanks, we specialize in engineering each tank to API Standard 650 to support structural integrity and leak prevention, then fabricated in-house for dependable field performance.

Manufacturing Capabilities

  • Shop-Assembled (Annex J): Built, tested, and prepared for installation, subject to transportation constraints.
  • Materials: Custom fabrication in Carbon Steel and Stainless Steel based on stored media and site conditions.
  • Roof Options: Fixed roof tanks (cone or dome) and floating roof tanks (internal or external) to reduce vapor loss.

API-650 Atmospheric Storage Tank Diagram

API-650 Tank: The global standard for atmospheric storage.

Why Choose EPV for Your API-650 Storage Tank?

API 650 Code Compliance

Every tank is engineered and fabricated to API Standard 650 to support structural integrity and leak prevention. We document builds for clear review and reliable acceptance in the field.

Materials and Linings

We fabricate in Carbon Steel and Stainless Steel, with optional corrosion resistant linings and coatings for chemical service or potable water storage requirements.

Shop-Built Speed and Quality

Our shop-assembled Annex J approach delivers tested tanks that arrive ready for installation, reducing field labor and keeping schedules predictable.

Typical Applications

Bulk Fuel Terminals

Atmospheric storage for diesel, gasoline, and other fuel products, designed to minimize leaks and support safe operations.

Fire Water Storage

Fixed roof tanks for fire protection water service, aligned with common industrial storage needs and site requirements.

Chemicals and Water

Storage for chemical feedstocks, process liquids, and water in carbon steel or stainless steel with optional coatings.

Frequently Asked Questions About API-650 Storage Tanks

Find quick answers to common questions about our API-650 atmospheric storage tanks and shop-built Annex J fabrication.

An API storage tank is a liquid storage tank designed, fabricated, constructed, and inspected according to standards developed by the American Petroleum Institute (API). These standards ensure safety, reliability, and environmental performance for tanks primarily used in the oil, gas, and petrochemical industries.

Yes, the tanks are fully tested and delivered installation‑ready, reducing field labor and maintaining schedule predictability.

We fabricate using Carbon Steel, Stainless Steel (304/316), and corrosion-resistant Alloys such as Inconel and Hastelloy. Material selection depends on your process requirements and is designed for maximum thermal efficiency and durability.

API Standard 650 Annex J permits only self-supporting fixed roofs: specifically, the cone roof, dome roof, and umbrella roof. Floating roofs (internal or external) are not specified as primary roof types within the standard's requirements for Annex J shop-assembled tanks.

API 650 Annex J storage tanks are shop-assembled, vertical, cylindrical tanks used for storing a variety of liquids at or near atmospheric pressure. They are commonly found in industrial facilities like oil and natural gas terminals, processing plants, and pipeline facilities due to their smaller size (typically not exceeding 4.2 meters or 14 feet in diameter) and ease of transport and installation in one piece.
Planning a Storage Project?

Send Us Your Specifications for a Competitive Quote on API-650 Tanks.

Share your capacity, roof type, media, and site constraints. Our team will respond with a clear path to scope, schedule, and pricing.

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