Preface
Hydrogen Safety Precautions
xxvi
TRACE 1300 and TRACE 1310 Hardware Manual
Thermo Scientific
If necessary, the piping system should have uninterruptible pressure relief. The pressure
relief system should be designed to provide a discharge rate sufficient to avoid further
pressure increase and should vent to a safe location outside or to a ventilation system
exhaust.
Purchasing Hydrogen
Use the following guidelines when purchasing hydrogen:
• Hydrogen Generator—Because it minimizes the amount of hydrogen present and reduces
the degree of hazard, a hydrogen generator (also called an electrolyzer) is the safest way to
purchase hydrogen in the quantity used in gas chromatography/mass spectroscopy
systems.
However, to minimize the degree of hazard, operate the hydrogen generator only in a
non-explosive environment because hydrogen buildup can be ignitable. Thus, your
ventilation system for the room or lab hood where the hydrogen generator operates must
maintain an air exchange rate at least two orders of magnitude greater than the maximum
hydrogen production rate of the hydrogen generator. Follow the manufacturers'
directions about proper use and maintenance of the regulator.
To prevent the possibility of releasing hydrogen, set the hydrogen generator to shut down
if:
−
There is a loss of flow to the ventilation system
−
A hydrogen detector alarms at 25% of the lower flammable limit of hydrogen in air.
Vent the oxygen exhausted by the electrolyzer to the outside as well.
• Hydrogen Cylinder—Hydrogen can be delivered in standard laboratory gas bottles or
cylinders. These cylinders have a limited amount of hydrogen in them and are a safe way
to transport and store hydrogen. Always secure, compressed hydrogen gas cylinders, like
all compressed gas cylinders, in an upright position, ideally with a non-combustible chain
or cable. If the cylinder falls over, the valve can fall off, causing the pressurized cylinder to
take off like a rocket, leading to the release of hydrogen and possibly an explosion, severe
injury, or death. Never crack a hydrogen cylinder valve to remove dust or dirt from
fittings prior to attaching a regulator, as there is a risk of self-ignition.
Properly Storing Hydrogen
Storing and handling compressed hydrogen gas and cryogenic liquid hydrogen present
potential health and safety hazards. Using proper storage and handling techniques is essential
to maintaining a safe work environment.
Use the following guidelines when storing hydrogen:
