Steel Storage Tank Manufacturer

Underground Storage Tanks

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Structural Steel Fabrication

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ASME Pressure Vessels

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Modern Welding Company is the largest underground and aboveground steel tank manufacturer in the United States. Modern has eleven manufacturing subsidiaries nationwide offering regional service and competitive pricing.

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Aboveground Tanks

Modern Welding's steel atmospheric tanks are intended for aboveground storage of noncorrosive, stable, flammable, and combustible liquids that have a specific gravity not exceeding that of water. Maximum allowable working pressure is 0.5 psig as measured from top of the tank. API tanks can be built to withstand pressures up to 15 psig.

Underground Tanks

When it comes to steel storage tank manufacturers, our underground tanks provide the ultimate in structural strength and compatibility for biofuels and additives, such as our Glasteel II double wall tank installed for underground fuel tank storage and other applications.

Pressure Vessels

Modern Welding manufactures ASME pressure vessels and LPG tanks for storage of gases or liquids at high pressures commonly used in chemical and petroleum storage amongst a variety of other industry or custom applications. As a tank and vessel builder, our commitment is safety providing pressure vessel tanks that are delivered to code specifications.

Structural & Custom Fabrication

Modern Welding Company has over 85 years of fabrication experience to meet your structural steel requirements. Contact us at either of our two structural steel subsidiaries.

Quality Assurance

Our Quality Program Encompasses All the Acronyms.

ASME, NBIC, AWS, AISC, UL, STI, and API, we have it covered.

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Safety Compliance & Performance

500,000 Hours with No Lost Time Injury.

Our culture is family and our commitment is to a safe workplace so everyone goes home.

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Built to Last. Designed to Lead.

Faster Lead Times

Robust Supply Chain

Certified Fabricators

Made in USA

AISC Certified Fabricator

At the Modern Welding Company of Kentucky, Inc. (our Elizabethtown plant), we specialize in custom plate and chute work, wear products, and structural steel fabrication with a proven record of high-quality production and dependable service. We custom fabricate steel products to serve the energy, construction, distillery, agriculture, defense, and mining industries.

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Why Steel Versus Fiberglass?

Quality steel fabrication provides a safer and more secure product.

Why Steel Tanks?

At Modern Welding Company, we take pride in delivering innovative, high-quality tank storage solutions across diverse industries. Our Project Stories showcase the breadth of our expertise—from advanced fuel storage systems at Reno-Tahoe International Airport to custom fabrication for U-Dump Trailers. Each project reflects our commitment to excellence and our ability to meet unique customer needs. Browse our projects to see how we bring engineering precision and reliability to every endeavor.