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External Visual
Walk-around inspection of the cargo tank shell, heads, piping and supports for damage, corrosion and DOT compliance.
MC306 · MC307 · DOT406/407/412
Certified federal cargo tank inspections for MC306, MC307, DOT406, DOT407 and DOT412 — performed on-site by a certified technician. Less downtime. No detours. No surprises.
Full federal compliance coverage across all five DOT cargo tank classes — from routine visual inspections to full pressure, lining and degassing services. One team, one number, one signed report.
Walk-around inspection of the cargo tank shell, heads, piping and supports for damage, corrosion and DOT compliance.
Confined-space entry to inspect interior welds, baffles, valves and lining condition — documented with full photo evidence.
Pneumatic and seal testing of all cargo tank compartments and product piping to detect even minor leaks.
Hydrostatic or pneumatic pressure testing to verify structural integrity to current 49 CFR specs.
Spark and continuity testing of interior linings to ensure chemical and corrosion protection is intact.
Volume calibration and overfill prevention system diagnostics — certified and documented for fuel haulers.
UC inspection of fifth-wheel plate, kingpin and support structure — safety-critical and federally required.
Tank washout and vapor purging to prepare trailers for inspection, repair, or product change-over.
We're not a shop you tow to. We come to you — with a federally certified inspector, full equipment, and the paperwork ready to be signed. Fewer hands on the job means fewer mistakes, faster turnarounds, and certifications you can trust.
Every report is performed and signed by CT #12790 — never a subcontractor, never a stamp-only review.
We come to your yard with the equipment and the paperwork — so your trailers stay where they earn, not in a shop bay.
Since 2013 we've built a name on doing it right the first time. Ask any of the carriers we work with monthly.
Whether you haul petroleum, chemicals, food-grade or hazmat — if it's a federally regulated cargo tank, we inspect it.
A federal cargo tank inspection isn't a walk-around. It's a full systems check — from coupling to dome. Tap any point on the tanker to see which inspection covers it.
Every federal cargo tank inspection covers structural, internal, mechanical and safety systems. Tap any of the numbered points on the tanker to see exactly what we check — and which inspections you'll need for your fleet.
Confined-space entry through the dome to inspect interior welds, baffles, valves and tank lining condition. Spark and continuity testing verifies the lining protects the shell from corrosive or reactive products.
Full walk-around inspection of the cargo tank shell, heads, piping, supports and reflective markings. Looking for corrosion, dents, weld cracks and anything that fails 49 CFR specifications.
Pneumatic and seal testing of every compartment and product line. Hydrostatic or pneumatic pressure testing verifies the tank holds its rated MAWP without leaks or deformation.
Volume calibration of every compartment and full diagnostic of overfill prevention sensors and Scully systems. Required documentation for petroleum and fuel haulers.
UC inspection of the fifth-wheel plate, kingpin and support structure. This is the most safety-critical connection on the trailer — and the most overlooked.
Pre-inspection tank washout and vapor purging. Required before internal inspection, repair work or any product change-over — performed on-site with the right containment.
From the first call to a certified report in your hands, we keep the process simple and fast — because we know what every day off the road costs you.
Call, text, or fill out the form. We confirm a date within the hour and show up where your trailer lives — no transport required.
A certified technician performs every required test using calibrated equipment — documented with photos, readings and notes.
You receive a signed, federally compliant inspection report. Audit-ready, fleet-ready, road-ready.
Since 2013, Triple D Inspections has built its reputation one tanker at a time. Founded and personally run by Dustin Cothern, every inspection is performed by a certified technician — never outsourced, never rushed.
We work fast because we know what every hour off the road costs you.
Tell us a little about your fleet and what you need inspected. We'll get back to you the same business day — usually within the hour.