CPI ASME Cryogenic Storage Vessel — 39.5L High-Pressure

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

This is an ASME-certified vessel. ASME certification qualifies it for stationary installation at your facility, including use as a bulk storage tank, buffer vessel, or process supply system. DOT certification would be required for highway transport as a portable container, which this unit does not carry.

What is the MAWP and capacity at service pressure?

The listing states a 4000 PSIG pressure rating and 39.5-liter capacity. The seller has not specified whether 4000 PSIG represents the MAWP or a derated service pressure, nor whether the 39.5-liter capacity is water volume or usable product capacity at service conditions. You should ask the seller for the nameplate MAWP, design temperature range, and whether capacity is stated as water volume or product volume at intended service pressure and temperature.

What is the requalification or inspection status?

The listing does not provide information on the last ASME inspection, hydrostatic test date, or current certification status. For stationary ASME vessels, your jurisdiction and insurance carrier typically dictate inspection intervals—often annual external exams and periodic internal inspections or hydrotests. Ask the seller for the most recent inspection records, nameplate date of manufacture, and any available service history.

What should I inspect before putting it into service?

Inspect the vacuum jacket for integrity by checking vacuum port gauge and looking for frost patterns indicating vacuum loss, then verify all pressure relief devices are present, in-test, and set correctly for your service. Examine the inner vessel welds and shell for cracks or corrosion using appropriate NDT methods, check all pipe connections and valve seats for damage, and verify the nameplate data matches your application requirements. ASME vessels used in cryogenic service should be hydrostatically tested and inspected per Section VIII requirements before returning to service after extended storage.