DOT Trailer Inspection Services
for Tank Trailers & Cargo Tanks
At BEP, we provide DOT trailer inspection services for cargo tanks and tank trailers used to transport regulated materials, including hazardous liquids and gases. A DOT trailer inspection is a federally required inspection governed by DOT regulations under 49 CFR and is essential for maintaining legal operation, safety standards, and overall DOT compliance.
These DOT trailer inspection requirements apply to cargo tank trailers used in fuel, crude oil, chemical, and propane transport. If a trailer is due for a DOT inspection, including an annual or periodic inspection, it cannot legally be loaded or transported until it passes. Staying current with trailer inspection requirements is critical for keeping your vehicle in service and avoiding disruptions.
Missed or failed DOT trailer inspection requirements can result in a trailer being taken out of service, fines, or delays during a roadside inspection. For operators managing a commercial vehicle or fleet, routine inspections are a key part of meeting safety regulations and maintaining uptime. At BEP, we help customers stay ahead of DOT inspection requirements with a thorough inspection process designed to keep each trailer compliant and ready for use.
DOT Inspection Types, Testing & Compliance Requirements
DOT inspection requirements for cargo tanks follow a structured inspection process designed to ensure each trailer is safe, structurally sound, and ready for transport. These federal DOT inspections go beyond a basic vehicle inspection and include multiple testing steps required for certification.
Core cargo tank inspection types include:
External visual inspection of the trailer, fittings, and structural components
Internal visual inspection to check for corrosion, wear, or internal damage
Leakage tests to confirm the tank is sealed and free from leaks
Pressure testing to verify safe operating conditions
Thickness testing to monitor material integrity over time
Lining inspections when applicable to ensure internal coatings remain intact
Each inspection is part of a defined DOT inspection process under 49 CFR and may be required as part of an annual inspection or periodic inspection cycle. These steps help ensure the trailer meets safety standards, supports proper cargo securement, and complies with all applicable regulations.
All inspections are completed by a qualified inspector with experience in DOT cargo tank inspection requirements. This ensures each trailer inspection is accurate and properly documented. Following inspection, records such as an inspection report or vehicle inspection report may be issued along with any required DOT inspection stickers.
If a trailer fails inspection, it must go through trailer repair and re-testing before returning to service. This ensures that every vehicle placed back into operation meets safety regulations and inspection standards.
DOT Trailer Inspections in North Dakota for Tank Fleets
BEP provides DOT trailer inspections in North Dakota for fleets operating tank trailers across fuel, crude, chemical, and bulk transport industries. We support a wide range of operations, including transportation companies, oil and gas distribution, agriculture, and industrial businesses that rely on compliant equipment.
One of the key advantages of working with BEP is our ability to handle both inspection and trailer repair in one location. If your trailer fails a DOT trailer inspection, we can complete the required trailer repair in-house and perform re-testing without sending your equipment elsewhere. Our tank trailer repair services help reduce downtime and keep your trailer in service.
We also offer complete tank inspections to support ongoing DOT compliance. Our team takes a practical approach to every inspection, identifying issues early and helping prevent delays during a roadside inspection or future annual inspection requirements.
As a full-service welding and fabrication shop, BEP handles drafting, cutting, bending, and repair work in-house. This allows us to complete most trailer service work without outsourcing, which helps maintain quality, reduce turnaround time, and keep costs competitiv
DOT trailer inspection is not just a requirement. It directly affects your ability to operate, pass roadside inspection checks, and maintain commercial vehicle safety. BEP supports your operation with a complete approach that combines inspection, repair, and fabrication in one place.
If your trailer is due for a DOT inspection, overdue for an annual DOT inspection, or has failed a recent inspection, now is the time to act. Contact BEP Petroleum & Tank to schedule your DOT trailer inspection and keep your equipment compliant, safe, and on the road.
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