What 180.405B means in plain language
FMCSR 180.405B covers the technical specifications and design requirements for cargo tanks used to transport hazardous materials. These regulations ensure that tanks meet structural, safety, and performance standards before they are placed into service carrying dangerous goods.
When an inspector cites 180.405B, they are identifying a defect or non-compliance in the tank itself—not necessarily in how it was loaded, placarded, or operated on that particular day. The issue could involve tank construction, material integrity, valve assemblies, or other built-in safety features that fall short of federal requirements.
For drivers, a 180.405B citation typically means the vehicle itself has a problem that requires repair or documentation correction before it can legally haul hazmat again.
What our enforcement data actually shows
Across our 13 million+ inspection records, 180.405B is cited very rarely. We see only 7 all-time citations for this code, with 1 citation in the last 12 months and 0 in the last 90 days. This makes 180.405B ranked 2312th out of 3,036 FMCSR codes by citation volume—far below average enforcement frequency.
When 180.405B does result in an out-of-service determination, it happens in 28.6% of citations (2 out of 7 vehicles placed OOS). This is slightly lower than the all-FMCSR average OOS rate of 31.4%, suggesting that many 180.405B findings are correctable defects rather than immediate safety failures requiring vehicle removal from service.
The rarity of this citation reflects either strong compliance with tank specifications industry-wide, or relatively infrequent inspector focus on detailed tank construction audits during roadside inspections. Either way, if you receive a 180.405B citation, you are in an uncommon situation.
Who gets cited most
Our inspection records show that Texas accounts for 1 citation in the last 180 days, with that citation resulting in an out-of-service determination (100.0% OOS rate).
All-time, the carrier with the most 180.405B citations in our database is ECO TRANSPORTES INTERNACIONALES SA DE CV (USDOT 558117) with 3 citations. Other carriers appearing in our records include MUMME OIL INC, TRANSPORTES NARI SA DE CV, LUIS BASILIO MENDOZA GOLLAS, and TRANSPORTES 365 SA DE CV, each with 1 citation.
The low overall volume means state and carrier patterns are not statistically robust enough to indicate systemic compliance problems within any specific operation.
How severe is this compared to similar codes
180.405B sits in the Hazardous Materials category alongside many more frequently cited regulations. For perspective:
General loading/unloading violations (177.834A-HMC) appear in 3,954 citations with a 99.2% out-of-service rate—nearly 600 times more common than 180.405B and almost always resulting in vehicle removal. Similarly, 177.834(a) shows 3,839 citations at 97.9% OOS rate.
Placarding violations (177.817(a)) occur 2,274 times with a 75.1% OOS rate, and 177.817(e) for deteriorated placards appears 2,038 times at just 5.2% OOS rate.
Movement of damaged hazmat packages (177.823(a)) generates 1,829 citations at 51.8% OOS rate.
Compared to these peer codes, 180.405B enforcement is exceptionally light and the out-of-service consequence is less certain. This suggests that tank specification issues are either caught before roadside inspection, corrected quickly once identified, or inspected less systematically than loading procedures and placarding.
How to avoid it
Since 180.405B relates to the tank itself rather than how you load or operate it, prevention focuses on equipment readiness before you haul hazmat:
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Schedule a pre-haul tank inspection. Before accepting a hazmat load, walk around the tank. Look for dents, corrosion, cracked welds, loose fittings, or damaged valve assemblies. If you spot visible defects, flag the vehicle as unfit for hazmat service until repairs are completed and documented.
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Verify tank documentation and certifications. Ensure the tank has current certification plates, markings, or inspection records showing it meets DOT specifications. Do not assume a tank is compliant just because it looks intact.
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Know your vehicle make and model requirements. Our data shows Volvo and other commercial vehicles appearing in citation records. Tank specifications vary by manufacturer and year; consult the owner's manual or maintenance records to confirm your tank meets current federal design standards.
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Keep maintenance records current. Regular inspections by qualified technicians help catch structural problems early. When inspectors see a documented maintenance history, it provides evidence of due diligence.
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Report suspicious tank condition to your dispatcher or fleet manager immediately. Do not attempt to haul hazmat in a tank with questionable integrity. The cost of a repair is far less than the cost of a citation, downtime, or cargo damage.