CPI 20" — 35.0 cu ft, 4000 PSIG ASME Packaged Pressure Vessel

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

This vessel is ASME N.B. certified with Grade J construction, which qualifies it for stationary high-pressure gas storage installations subject to ASME Section VIII rules. ASME vessels are designed for fixed installations at plants and facilities, not for transportation, and must be installed per the applicable jurisdiction's boiler and pressure vessel code.

What is the MAWP and capacity at service pressure?

The vessel is rated for 4000 PSIG with a capacity of 35.0 cubic feet. The listing does not specify whether 4000 PSIG is the MAWP or a design pressure with a different working pressure, so confirm the nameplate MAWP and any temperature derating with the seller before sizing your application.

What is the requalification or inspection status?

The listing does not provide current inspection or requalification status. Ask the seller for the last internal and external inspection dates, any recent hydrostatic test documentation, and the National Board Form R-1 history if available, as most jurisdictions require periodic inspections for ASME pressure vessels in service.

What should I inspect before putting it into service?

Verify the nameplate data, National Board stamp legibility, and check for corrosion, dents, or arc strikes on the shell and heads. Inspect all nozzles, pressure relief devices, and threaded connections, and confirm that any previous service history is compatible with your intended gas—vessels used for sour gas, hydrogen, or other embrittling services may have material integrity concerns. A hydrostatic test and internal inspection by an authorized inspector are typically required before returning a used ASME vessel to service.