Good equipment with a problem isn't scrap.

Usually, yes. The leak is found with helium leak testing, the space between the inner and outer vessel is dried and pumped back down, and the vacuum is verified before it goes back. Just pumping it down without finding the leak only buys time — we don't do it that way.

Frost or sweating on the outer shell and fast boil-off are the classic signs of lost or degraded vacuum. It can also be a stuck or leaking relief valve or economizer. Send us what you're seeing and the last vacuum reading if you have one, and we'll tell you what it likely is before anything is shipped.

Sometimes. Moving a nitrogen or argon tank to oxygen service, for example, means cleaning for oxygen service plus the right valves, relief devices and labels. Tanks built for LNG stay in LNG service. Tell us what it was used for and what you need, and we'll say whether a conversion makes sense.

Most high-pressure tubes, including DOT 3AAX tube trailer tubes, must be requalified every 5 years. Some smaller DOT 3AA cylinders in specific gas service can qualify for 10. Retests are done by qualified requalification facilities — we'll check the stamps and tell you where yours stand.

It depends on what it's built to. ASME pressure vessels can be repaired or altered by shops holding a National Board R stamp, with the paperwork to match. DOT tubes and cylinders are different: one that fails its requalification test is condemned, not repaired — but the trailer, valves and manifolds around it often can be.

Besides retesting the tubes: valves, manifolds and fittings, the frame and paint, and the running gear — brakes, axles, suspension and lights — so it's ready for the road as well as the test.

When the shell is sound and the paperwork is intact, rehab usually costs well under new and is back in service sooner. When it isn't — a damaged inner vessel, a missing data plate, a unit modified without records — replacing can be the smarter money. We'll tell you which one you have before you spend anything.

It depends on the equipment and the shop's schedule. Liquid cylinders are typically the quickest; bulk tanks and transport trailers take longer. You'll get a turnaround time in the quote, before any work starts.

Warranties come from the shop doing the work — vacuum warranties are common on cryogenic rehab. The exact terms are in your quote, so you know what's covered before you say yes.

A partner shop matched to your equipment — the one we know does that kind of job best. We handle the scope, pricing, pickup and delivery, so you deal with one point of contact the whole way.

What it is, where it is and what's wrong. A clear photo of the data plate helps more than anything else — make, model, serial, MAWP and year — plus any recent vacuum readings or test dates you have.