Fabrication & Welding Shop in Bismarck, ND

BEP Petroleum & Tank LLC is your true one-stop welding and fabrication shop. We provide custom metal fabrication, heavy equipment modification, and precision repair solutions for transportation, agriculture, industrial operations, and oilfield-related industries throughout North Dakota.

Our experienced welders work with most types of metals, including steel, stainless steel, aluminum, and specialized alloys, to deliver high-quality components built to last.

Custom 20ft by 8ft structural steel truck dump bed fabrication Bismarck ND

From a Dinner Napkin to a Finished Build

Have a project in mind but don’t have formal blueprints? Don't sweat it! We have literally created projects from a sketch on a dinner napkin.

Whether you bring us detailed engineering drawings, a rough concept, or a broken physical sample, our team has the tools and field expertise to handle the design, material selection, and custom fabrication process from start to finish. We support:

One-off custom builds and prototypes
Small-batch production runs
Large, repeating production schedules

Advanced Structural & Tank Capabilities

Our shop is uniquely equipped to handle heavier-duty commercial applications and demanding structural requirements that standard garages cannot touch:

Trailer Welding & Fabrication: Full commercial trailer repairs, structural cross-member modifications, and custom heavy-duty components built to specification.
Fuel & Propane Tank Work: Dedicated fuel tank repair, fabrication services, and certified tank washouts completed with an absolute focus on safety and durability.
Custom Structural Builds: Load-bearing assemblies, flatbeds, heavy equipment platforms, custom generator stands, mounts, brackets, and couplers.

Certified welder fabricating heavy duty mounting straps on a commercial fuel tank Bismarck ND

Full-Service Cutting & Forming Equipment

Because we handle your entire project internally, your work moves seamlessly from raw material to a finished component without relying on multiple outside vendors:

Precision Metal Cutting: High-speed plasma/torch table cutting for materials up to 3" thick, alongside advanced waterjet cutting and band saw processing.
Heavy-Duty Forming: Multi-ton press brake forming, sheet metal bending, shearing, hole drilling, and a plate roller capable of rolling 1/4" material at eight feet wide.
Certified Welding Services: Expert application of GMAW, SMAW, FCAW, and GTAW welding processes tailored strictly to the material and application.

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Frequently Asked Questions

Yes. Our shop can easily plan your build during an initial consultation using a rough sketch, a physical part, or just a verbal concept. To get an accurate quote started, having basic outer dimensions, material preferences (steel, aluminum, or stainless), and a description of how the part functions is extremely helpful.
No job is too big or too small. We regularly handle everything from quick, small trailer gate or farm equipment repairs for walk-in customers to large-scale custom industrial builds and repeating fleet component production runs.