Cargo Tank Testing, DOT Inspections & R-Stamp Repair | Bismarck, ND
Certified Fleet Compliance, Code Welding, and Tank Modifications
At BEP Petroleum & Tank, we understand that down-time costs you money. We have three Registered Inspectors on-site to handle your complete cargo tank testing, DOT compliance inspections, certified pressure vessel modifications, and bulk storage tank repairs. By keeping your inspections, certifications, and structural changes under one roof, we fast-track your compliance and get your equipment back in service.
Custom Tank Trailer Modifications & Conversions
When your transport requirements change, you don't have to buy entirely new over-the-road equipment. Our experienced code welders alter and re-certify cargo trailers to maximize your fleet's investment:
Tank Barrel & Product Conversions: We perform safe, certified conversions to shift your trailer into a high-demand application (e.g., Anhydrous Ammonia to Propane/LPG, or chemical units to vacuum tank service).
Commercial Trailer Chassis Stretching: We cut, extend, and structurally reinforce your existing trailer frame to add extra barrels of carrying capacity while ensuring complete tracking alignment and compliance.
Stationary Bulk Storage Tank Repairs & Maintenance
In addition to our over-the-road trailer services, we specialize in the ongoing repair, alteration, and maintenance of stationary bulk storage tanks at fuel terminals, bulk plants, and agricultural facilities. Whether you need on-site R-stamp crack repairs, emergency valve replacements, or structural shell modifications to meet safety compliance codes, our mobile teams and shop welders keep your storage infrastructure operational.
Bobtail Truck Meter Calibration & Programming
We provide liquid volumetric meter prover system calibrations, electronic programming, and mechanical repairs for fuel and LPG bobtail delivery trucks. Whether you need an emergency calibration in our shop or scheduled fleet servicing onsite at your bulk facility, we keep your delivery meters accurate and legally certified.
National Board R-Stamp Certified Welding
We are a fully certified National Board R-Stamp repair facility. When the pressure boundary of a cargo tank or industrial pressure vessel is affected, standard commercial welding shops cannot legally touch it. Our team follows strict National Board Inspection Code (NBIC) and ASME standards to perform:
Structural Code Welding: Certified repair and alteration work on tank shells, heads, and piping systems.
Corrosion Restoration & Crack Repair: Splicing and reinforcing fatigued, pitted, or damaged metal surfaces.
Nozzle & Fitting Replacements: Precision fitting modifications to maintain complete pressure integrity.
Complete DOT Cargo Tank Inspections & Testing
Federal regulations require commercial cargo tanks to undergo routine testing [ctrl46] to remain in service. Our on-site Registered Inspectors are fully qualified to perform and certify the complete array of V-K-I-P-T-UC compliance tests [ctrl46]:
V – External Visual Inspection: Required Annually [ctrl46]
K – Leakage Test: Required Annually [ctrl46]
I – Internal Visual Inspection: Required Every 5 Years [ctrl46]
P – Pressure Test: Required Every 5 Years [ctrl46]
T – Thickness Test: Required Every 2 Years [ctrl46]
UC – Upper Coupler Inspection: Required Every 5 Years [ctrl46]
Schedule Your Fleet or Bulk Tank Service Today
Need to book a DOT inspection, pull a tanker into our R-Stamp bay, or schedule an on-site bulk tank modification?
📞 Call our Bismarck shop directly at 701.258.5427 to schedule an appointment with our inspectors, or use the button below to request an estimate online:
[ Request an Inspection or Repair Quote ] (Make this button Red!)
Test & Inspection Requirements
V – External Visual Inspection – Annual Test
K – Leakage Test – Annual Inspection
I – Internal Visual Inspection – Five Year Test
P – Pressure Test – Five Year Test
T – Thickness Test – Two Year Test
UC – Upper Coupler Inspection – Five Year Test