Is it necessary to perform a hydrogen leak test before the device is put into operation for the first time?
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Is it necessary to perform a hydrogen leak test before the device is put into operation for the first time? After all, hydrogen has a higher permeability than nitrogen.
If the nitrogen pressure can reach a pressure sufficient for airtightness, nitrogen can be used to achieve airtightness.
It depends on what the device is; definitely, it must first be replaced with a gas suitable for the processing medium. :lol
Nitrogen is generally used for airtightness, with the airtightness pressure being the maximum operating pressure.
For the reforming unit, I was previously involved in dehydration tasks; back then, all hydrogen-related systems were first made airtight with nitrogen, and then made airtight with hydrogen.
Previously, we worked on dehydrogenation units; after completing the nitrogen leak testing, when we proceeded with hydrogen leak testing, new leakage points appeared in the system. It always seems that it’s safer to perform hydrogen leak testing on the hydrogen system, especially in high-temperature areas? What do you all think?
Hydrogen airtightness testing can be carried out, but only on the condition that the nitrogen airtightness test has passed
No need; generally, nitrogen is used for airtightness tests, as using hydrogen is too costly
The airtight pressure of nitrogen can reach your operating pressure, so generally there is no major issue. It is safest to increase the hydrogen pressure and then seal it airtight.
Here we use hydrogen sulfide; first, the system is sealed with nitrogen, and then sealed again with hydrogen sulfide. After that, the material is introduced, and the result is very good.