Fiba 34.1 cu.ft. — 5500 PSIG ASME Packaged Vessel

Is this ASME or DOT rated, and what does that allow me to do with it?

This vessel is ASME Code certified, which means it's designed for stationary installation at your facility. ASME vessels are not approved for highway transport of compressed gases—if you need to move gas over the road, you'll need DOT-certified cylinders or tube trailers.

What is the MAWP and capacity at service pressure?

The listing states a pressure rating of 5500 PSIG and a capacity of 34.1 cubic feet. ASME vessels typically have the Maximum Allowable Working Pressure (MAWP) stamped on the nameplate along with design temperature range—ask the seller for nameplate photos to confirm MAWP and whether the 5500 PSIG is MAWP or a different rating. The 34.1 cu.ft. is likely water volume; for gas capacity at your working pressure, you'll need to calculate based on actual MAWP and your fill pressure.

What is the requalification or inspection status?

The listing indicates this is new equipment. As an ASME vessel for stationary service, it's not subject to the periodic requalification intervals required for DOT cylinders, but your jurisdiction may require periodic in-service inspections under local pressure vessel codes or your insurance carrier's requirements.

What should I inspect before putting it into service?

Verify the ASME nameplate is intact and legible, confirm all stamped data matches your service conditions (pressure, temperature, and gas compatibility), and check that relief valves are sized and set correctly for your application. Inspect all valve threads, packings, and connections for damage from shipping or storage, and confirm the Grade J construction is compatible with your intended gas service—some gases require additional material certifications or cleaning beyond standard Grade J.