Hydrogenation
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Due to cracks in the circulating hydrogen pipeline that required hot work (operations have been halted), gas detection after pipeline purging (nitrogen purging and steam purging) showed unacceptable levels of flammable gases. It only became acceptable after being purged with water. Problem identified: There is corrosion in the circulating hydrogen pipeline. What could be the causes of this corrosion? For example, with ferrous sulfide and ammonium salt crystals, is it possible to have iron oxide-related substances? Also, do these corrosives have an adsorptive effect on hydrogen sulfide, thereby causing nitrogen to displace it? Does steam purging fail to bring the flammable gas to acceptable levels?
In the end, it was thought to be the self-decomposition of hydrogen sulfide and ammonia
Can the hydrogen circulation line be purged with steam when the cause of corrosion is unknown?