Hydrogen Safety; Safe Use Of Hydrogen Cylinders; General Guidelines; Using Hydrogen Gas Cylinders - Crowcon Gas-Tec Manual Del Usuario

Gas-Tec
XII Hydrogen Safety

Safe use of hydrogen cylinders

12.1 General guidelines

WARNING: GAS HYDROGEN CYLINDER PRESSURE MUST NOT EXCEED 1800 psi (124 bar).
It is important to maintain a supply of full hydrogen cylinders if the Gas-Tec is to be used regularly . See
Section IX to check how long the cylinders to be used will last .
Hydrogen is not a dangerous gas if released into the air in small quantities . The biggest risk is that hydro-
gen will build up inside the equipment . Beyond a certain pressure, or rapidly released into air, the gas
could ignite . This could cause an explosion .

12.2 Using Hydrogen Gas Cylinders

The following are some safehandling guidelines that have been established to help assure the safety of
your hydrogen gas operations .
• It is very important to secure all compressed gas cylinders in an upright position where that they can-
not be knocked over .
• Hydrogen gas cylinders should never be used if pressure has not been reduced by a suitable regu-
lator at the cylinder, or at the outlet of the header valve of a cylinder manifold . Use only regulators
intended to be used with hydrogen and never force connections that do not readily fit together .
• Never open a hydrogen cylinder valve to remove dust or dirt from fittings prior to attaching a regu-
lator . While this practice may be acceptable for other gases, with hydrogen there is a risk of self-
ignition .
• Once the regulator is attached, be sure that the regulator adjusting screw is in the closed position
before opening the cylinder valve . When opening the valve, turn the hand wheel slowly so that the
hydrogen does not enter the regulator suddenly . Never use a wrench, hammer, or other tool to open
or close the hand wheel .

12.3 Filling the hydrogen cylinder

When filling hydrogen please follow all safety precautions and filling panel instructions that are supplied,
or use an approved specialist to do this .
Purity of hydrogen gas required is 3 .0 Grade Hydrogen (99 .9%) .
Damaged or discarded cylinders should be treated as 'hazardous waste' .
Troubleshooting
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