Hi Brian,
I have received liquid helium from FedEx and agree in your sentiment about =
how odd it is that they can transport it. I have not received a delivery
with the safety valve off though.
Cheers,
Jessica
Dr. Jessica M. Roberts, Ph.D.
Assistant Professor of Instruction
NMR Facility Manager
Department of Chemistry and Biochemistry
Ohio University
245 Chemistry
Athens, OH 45701
740.593.0038
jroberts_at_ohio.edu
--
On May 10, 2025 9:55 AM, "b-myers via groups.io" wrote:
Two days ago, while off campus, colleagues helped receive a 100 L dewar of
liquid helium. Today, I checked the dewar and found the safety valve off.
Opening it released a lot of pressure, so I opened the side vent, and a 2
meter jet of helium shot out for a few minutes. Thankfully, no one was near
the vent. None of the valves were shrink-wrapped, and my colleagues said
they didn’t touch them. I know the tank has blast safety burst caps,
so it’s unlikely it would explode, but it was disturbing. I am guessing
that if the burst cap had ruptured after we took the dewar, we’d
have had to replace the helium. It’s also strange that FedEx could
transport liquid helium.
In any event, I am curious to know if others in this group have received a
liquid helium dewar with the safety valve off? And is it common to get
deliveries of liquid helium by FEDEX (box truck)?
Brian
--------
Brian Myers, Ph.D.
Professor of Chemistry
Meyer Hall of Science (rm 256)
Ohio Northern University
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#2325): https://urldefense.com/v3/__https://ammrl.groups=
.io/g/main/message/2325__;!!PvDODwlR4mBZyAb0!Sze8skLZA8XVL_pfhUFNzPeQNw5LCk=
spNxiJ_CggMRMUkoVDeEt3ORaDI8TFlimvmosrltCZVx099xaY-jAhy_o_RwqJ$
Mute This Topic: https://urldefense.com/v3/__https://groups.io/mt/113040337=
/7559972__;!!PvDODwlR4mBZyAb0!Sze8skLZA8XVL_pfhUFNzPeQNw5LCkspNxiJ_CggMRMUk=
oVDeEt3ORaDI8TFlimvmosrltCZVx099xaY-jAhy_kLFv6J$
Group Owner: main+owner_at_ammrl.groups.io
-=-=-=-=-=-=-=-=-=-=-=-
Received on Sat May 10 2025 - 07:12:29 MST