Cylinder Storage Instructions; Cryogenic Liquids - Agilent Technologies 4100 Site Preparation Manual

Laboratory Facilities

Cylinder storage instructions

Cylinders containing gas under pressure should be firmly secured to
a rigid structure, and the storage area must be adequately ventilated.
Never locate gas cylinders in a position that is subject to direct heat.
Gas storage cylinders often incorporate a pressure release device
which will discharge the gas at a predetermined temperature, usually
around 52 °C (125 °F).
If gases are to be plumbed from a remote storage area to the
instrument site, ensure that the local outlets are fitted with stop
valves, pressure gauges and suitable regulators which are easily
accessible to the instrument operator. The gas outlets must be
provided within 1.5 meters (5 feet) of the instrument.

Cryogenic liquids

Cryogenic liquid gases are stored under pressure at very low
temperatures in Portable Liquid Cylinders (PLC).
WARNING Extreme Cold
Contact with the super-cold liquid, gas or pipe surfaces can cause severe
skin damage. The Portable Liquid Cylinders should be located in a shielded
position, and all piping should be routed or covered to prevent skin contact.
For high gas flow rates and/or low ambient temperatures, it may be
necessary to obtain sufficient gas pressure by passing the liquid
through an external evaporator rather than use the internal pressure
building facility of the PLCs.
Liquid argon and liquid nitrogen may not be stored for extended
periods and often have special storage requirements. Contact your
local authorities and cryogenic gas supplier for more detailed
information on storage requirements and boil-off rates for local types
of PLCs.
34 Agilent 4100 Microwave Plasma Atomic Emission Spectrometer Site Preparation Guide