Packaged Cryogenic Vessel — Multi-Gas Storage

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

The listing does not provide current vacuum levels or normalized evaporation rate data. Request recent vacuum gauge readings (typically measured in microns or Torr) and NER values from the seller, as these are critical indicators of insulation performance and determine whether the vessel requires re-evacuation before service.

What product has it held, and what can it be converted to?

The listing indicates the vessel is designed for multiple cryogenic gases including nitrogen, oxygen, argon, hydrogen, and helium, but does not specify which product(s) it has actually stored. Prior service history matters because converting between oxygen service and hydrocarbon/hydrogen service typically requires extensive cleaning and re-certification due to contamination and compatibility concerns, while switching among inert gases is generally straightforward.

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

The listing does not confirm data plate condition or availability of the ASME U-1A Manufacturer's Data Report. Both are essential for re-installation and jurisdictional acceptance—request photos of the nameplate showing MAWP, design temperature, serial number, and National Board number, plus a copy of the U-1A if the vessel will operate under ASME jurisdiction.

What is involved in relocating and re-commissioning it?

Relocation of cryogenic bulk tanks typically requires specialized rigging due to the vacuum-jacketed construction, proper venting and purging before transport, and verification that support saddles and anchor points remain intact. Re-commissioning generally involves vacuum integrity testing, pressure testing per the original code of construction, relief device recertification or replacement, and instrumentation calibration, with the scope depending heavily on how long the vessel has been idle and whether vacuum has been maintained.