Annealing Oven Hydrogen Purge
Annealing Oven Hydrogen Purge
(OP)
I am installing an oven that uses Hydrogen as the cover gas and the design has a hydrogen purge after burner on the unit which would be inside the plant (the manufacturer is a Japanese company with no experience fabricating equipment for the US). I seem to recall in a plant I worked at several years ago had annealing ovens that had a hydrogen burner right on the vent which was inside the building. Then it was exhaust outside the plant thru a duct. However, I cannot find any source that indicates a hydrogen purge vent burner can be install inside a building. Can anyone provide me some insight?





RE: Annealing Oven Hydrogen Purge
Perhaps NFPA 86 would have the answer to your question.
Aidan McAllister
Metallurgical Engineer
RE: Annealing Oven Hydrogen Purge
Our plants in mild climates have vent hood over them, but in the north we don't even bother with that.
Some of these are new installations and comply with all current codes.
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P.E. Metallurgy, Plymouth Tube
RE: Annealing Oven Hydrogen Purge
RE: Annealing Oven Hydrogen Purge
Depending on which plant (we bright anneal in 3 locations) we have 2400-4000 scfm of hydrogen flow, with it all vented indoors via burn-off.
We want to run ours at low temps (1200F) so we needed to modify the interlock logic to allow us to purge, heat to over 1500F, introduce hydrogen, and then reduce temperature.
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P.E. Metallurgy, Plymouth Tube
RE: Annealing Oven Hydrogen Purge
B.E.
You are judged not by what you know, but by what you can do.