Surge with cryogenic

And USDA oversight because of food production also.

 

I’ve seen a lot of LGT trucks up here in the PNW. Brown 579’s. Do they have cameras?

 

Yeah, the product is -430 or something like that! lol.. You have to super cool the pump for a while before you send it out to the storage tanks. It was pretty interesting at first, and then just got kind of boring. Hospitals can be pretty crazy as they tend to put the tanks in and then build around them as the years go by. The worst one for me was in San Francisco. if had to be the first delivery as you had to be full to get anything off.. it was on one of "those" hills, nose down. Had to drag the hose across the sidewalk and into a small door into a room where the tanks were located.. Never liked it one bit. I also went to a place where you literally had to drive through and re lock 13 different gates and then up to a dam on a reservoir to a tank.. you had to offload as a loaded truck was too heavy to cross the top of the dam (really spooky at night) My favorite places were wineries (Nitrogen). usually lots of room lots of storage and it was a simple pump off.

 

Looks like ya got a little leak there @FozzyNOK , might wanna check your o-rings.

 

I was really odd to see people just walk over the hoses without a care in the world.. When I was hauling gasoline, those dummies wouldn't walk near them.. just try and drive over them..

 

There's no job like fuel hauling to make you realize just how stupid the general public really is.

 

We do the morgue at mayo clinic with a extended hose and I can put 8 cones out and someone is going to trip every time...lol

 

Especially in the U-P

 

At least they haven't been conned into sticking their tongue to it.

 

N2 is around -310 degrees, O2 runs around -294. I constantly had to tell guys with 'frozen' pumps that it was OK that the hospital could only give them cold water as it was well over 300 degrees warmer than the frozen pump...

I was told that when a cyro trailer develops front to back surge it is a sign that the baffles have become detached, usually a sign for a rebuild, especially if it has hard time keeping a vacuum between the inner and outer shells...The caps on topo of a cryogenic trailer ae not threaded on but only held in place by the vacuum between the shells.

The cost of the double shell with no thickness loss to corrosives means that they will be re-built multiple times.

On the other hand way back when Liquid Carbonic was contacted by Con Ed to spot an N2 trailer in NYC to freeze the dielectric oil [transformer oil] inside the underground electric conduits for repairs; they always sent the unit with the worst vacuum.

We would re-fill the spotted trailer until the repairs were completed weeks later. With the trailer delivering a steady stream of N2 and it's lower vacuum meant more re-fills.....