Used tank car buyer's checklist

Before buying a used tank car, confirm its DOT specification is allowed for your commodity, check the tank's qualification and inspection dates, and verify the lining, valves and fittings, last commodity and cleaning certificate.

This checklist is general guidance, not regulatory advice. Hazardous-materials tank cars are governed by U.S. DOT regulations (49 CFR, mainly Parts 173, 179 and 180), administered by PHMSA and FRA, and by Transport Canada in Canada. Confirm requirements for your commodity with the regulations or a qualified consultant.

1. Specification and commodity

• DOT specification (for example DOT-111, DOT-117, DOT-105, DOT-112) is stenciled on the car. The spec decides which commodities it may legally carry.
• Flammable liquids (Class 3). Federal rules phase legacy DOT-111 and CPC-1232 cars out of flammable-liquid service on fixed deadlines, with newer DOT-117 or retrofitted DOT-117R cars taking their place. A legacy car may still carry other, non-flammable commodities. Check the current deadline for your commodity before you buy.
• Pressure versus general-service. Pressure cars (such as DOT-105 and DOT-112) carry gases like LPG or anhydrous ammonia; general-service cars carry liquids.
• Capacity in gallons, and whether the car is insulated, jacketed, heater-coiled or lined, all need to match the product.

2. Qualification and inspection dates

Tank cars must be requalified at intervals set in 49 CFR Part 180, Subpart F. That covers the tank itself, service equipment, safety relief devices, thickness tests and linings where applicable. Ask for the most recent dates and when each is next due. A car close to its due date needs that cost priced in; some listings note it directly (for example "qualified until 2034").

3. Linings, valves and fittings

• Interior lining or coating type and condition, if the commodity needs one
• Bottom outlet valve, top fittings, pressure relief device: type, condition and whether they suit your loading rack
• Heater coils, if your product needs heating to unload
• Head shields and thermal protection where the spec requires them

4. Last commodity and cleaning

Ask what the car last carried and whether it was cleaned. Food-grade service and many chemicals need a cleaning certificate, and a residue that isn't compatible with your product can disqualify the car or add a cleaning bill.

5. The rest of the car

• Built date and remaining interchange life (see the buying guide)
• Gross rail load (263,000 or 286,000 lb) versus your route
• Trucks, wheels, brakes, couplers (tank cars generally need double-shelf couplers) and draft gear
• Any open defects, damage or required modifications

Find tank cars

See current tank car listings and the asking-price log, which includes any tank-car prices posted publicly.

Frequently asked questions