Fiba 24" ASME N.B. Packaged Vessel — 46.0 gal, 4000 PSIG

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

This is an ASME National Board Grade J vessel, meaning it's built for stationary installation at a fixed facility rather than transport. ASME vessels are designed for permanent plant installation and cannot be legally transported over the road when filled—if you need a transportable vessel, you'd require DOT certification instead.

What is the MAWP and capacity at service pressure?

The vessel is rated for 4000 PSIG with a 46.0 gallon capacity. The listing does not specify whether this capacity is water volume or at rated pressure, so confirm with the seller whether 46.0 gallons refers to the vessel's internal water capacity or usable gas volume at 4000 PSIG.

What is the requalification or inspection status?

The unit is listed as new condition but the listing does not state whether it carries a current National Board certification or hydrostatic test date. Since this is described as new, confirm with the seller that it includes current NB certification paperwork and verify the hydrostatic test date—ASME vessels typically require requalification intervals based on the code year and service, commonly every 3 to 5 years depending on jurisdiction and application.

What should I inspect before putting it into service?

Verify the National Board stamp, nameplate data, and that all certification paperwork matches the physical vessel. Inspect all three ports and their threaded connections for shipping damage, verify pressure relief device presence and settings, and check for any cosmetic damage to the exterior coating that might have occurred during storage or transport even though the unit is new.