18,800 Gallon LNG Cryogenic Storage Tank – 70 PSI – Process Engineering

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

The listing does not provide the current vacuum reading or normal evaporation rate (NER). Request the most recent vacuum gauge reading in microns and the measured NER in pounds or gallons per day—these figures indicate insulation integrity and operating economics. On vacuum-jacketed LNG tanks, readings above 50 microns typically signal degraded insulation, and NER should be well under 0.5% of capacity per day for a tank of this size.

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

The listing states the data plate is mounted externally with the original also attached to the inner vessel, and provides the National Board Number 10650, but does not confirm legibility or U-1A availability. Request photos of both plates showing all stamped information clearly, and ask for the original U-1A manufacturer's data report—jurisdictions typically require these documents for re-certification and some will not accept reproductions.

What is involved in relocating and re-commissioning it?

The listing notes it was designed for trailer transport to site when empty, but provides no information on current installed condition, connections, or foundation. Ask whether it's skid-mounted or on a permanent pad, what needs to be disconnected, and if any permits are required for removal. Re-commissioning typically requires vacuum system integrity testing, pressure testing, relief valve recertification, and jurisdictional inspection with the U-1A and National Board documentation before returning to LNG service.