MVE VCS-525 — 525L Vertical Cryogenic Storage Tank

What is the current vacuum reading, and what is the NER?

The listing does not provide vacuum readings or evaporation rate data for this unit. Request current vacuum level (typically measured in microns) and the documented normal evaporation rate (NER) from the seller, along with the date those readings were taken. On vertical dewars of this vintage, vacuum degradation is common and NER above 2-3% per day typically indicates insulation failure or a compromised vacuum jacket.

Is the data plate legible, and is the U-1A available?

The listing does not confirm data plate condition or availability of ASME Form U-1A documentation. Both are critical for pressure vessel recertification and regulatory compliance—the data plate must be readable to verify design pressure, MAWP, and original construction code, and the U-1A provides the manufacturer's data report required by most jurisdictions. Request photos of the data plate and a copy of the U-1A from the seller before proceeding.

What is involved in relocating and re-commissioning it?

Cryogenic dewars of this size typically require a flatbed or box truck, rigging equipment rated for the empty weight (usually 800-1200 lbs for a 525L vertical), and careful handling to avoid vacuum jacket damage. Re-commissioning will require hydrostatic testing if the vessel is due for requalification, leak testing of all valves and connections, vacuum and NER verification, and pressure relief device inspection or replacement per CGA S-1.3. Verify local jurisdiction requirements for in-service inspection intervals, which vary but are often 5-10 years for cryogenic service.