Liquid Argon Storage Tank

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

The listing does not provide current vacuum performance data or the normal evaporation rate. Request recent vacuum hold test results and current boil-off rate data from the seller, ideally with date and ambient conditions noted. For vacuum-insulated cryogenic tanks of this vintage, elevated NER typically indicates degraded vacuum insulation that may require re-evacuation or perlite replacement.

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

The listing confirms National Board number 40630 and CRN 5530 MA WP-1 registration, but does not indicate data plate condition or whether the original U-1A manufacturer's data report is available. Request photos of the actual nameplate and a copy of the U-1A from the seller, as both are typically required for pressure vessel transfers and re-registration in most jurisdictions.

What is involved in relocating and re-commissioning it?

The listing shows the current location as Waxahachie, TX (though fabrication location was Versailles, KY). Relocation typically requires draining, purging, nitrogen blanketing during transport, and a qualified rigging contractor familiar with vacuum-jacketed vessels to prevent insulation damage. Re-commissioning generally includes hydrostatic or pneumatic testing per jurisdiction requirements, vacuum performance verification, safety valve recertification, and National Board Form R-1 filing if moving between states or provinces.