Precautions In Handling And Storage - Thermo Scientific TVA2020 Instruction Manual

Precautions in
Handling and
Thermo Fisher Scientific
clockwise) until the rubber tank boot is flush with the instrument sidepack
and a slight resistance is felt. Do not overtighten.
WARNING A safe refill operation means there are no hydrogen leaks.
Before any valves are opened, use a wrench to firmly tighten connections to
the hydrogen supply tanks and the tank fill adapter. If escaping hydrogen is
heard during the filling operation, close all valves and correct the leak
before proceeding. Leak test with soapy water or equivalent.
CAUTION Do not fill hydrogen tank to a pressure greater than 15.2 MPa
(2200 psig).
Note Use prepurified ZERO grade hydrogen (certified total hydrocarbons
as methane <0.5 ppm recommended).
Note The hydrogen filling assembly contains a flow-limiting safety device.
Approximately two minutes are required to fill the tank.
The major hazard associated with the handling of hydrogen is flammability.
The following specific rules apply when handling hydrogen:
Storage
Never use cylinders of hydrogen in areas where flames, excessive heat,
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or sparks may occur.
Use only explosion-proof equipment and spark-proof tools in areas
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where hydrogen is handled.
Ground all equipment and lines used with hydrogen.
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Never use a flame to detect hydrogen leaks — use soapy water.
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Do not store reserve stocks of hydrogen with cylinders containing
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oxygen or other highly oxidizing or combustible materials.
Store hydrogen tanks in a well ventilated area.
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Follow all regulatory safety and labeling precautions when shipping
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hydrogen in the TVA2020.
Note A bleeder assembly is provided in the tool kit to allow the hydrogen
tank to be emptied for common carrier shipment. To use the bleeder,
manually screw the bleeder onto the tank valve and allow the hydrogen to
vent. This process will take about two minutes to complete.
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Preventive Maintenance
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TVA2020 Instruction Manual
Hydrogen Gas Tank
5-5