UN DOT 3AX-2538 — 2,650 gal High-Pressure Tube Trailer

What is the actual gas capacity at service pressure?

The trailer has a rated capacity of 2,650 gallons at 109,000 PSIG. For compressed gases, actual delivered capacity depends on the specific gas and operating pressure range—hydrogen service at full pressure will yield significantly different usable volumes than nitrogen or helium, so confirm your service gas and typical fill/delivery pressures when evaluating suitability.

What should I inspect on a used tube trailer before buying?

Verify current hydro dates and DOT markings on all tubes, inspect manifold valving and isolation valves for leaks and operation, check tube exterior for corrosion or impact damage, and examine the ISO frame and trailer suspension for structural integrity. Request copies of all previous test records and any repair documentation, and if the tubes are near requalification due date, factor that testing and potential rejection risk into your evaluation.