years ago i used acetylene and converted to propane. recently i
bought a hydrogen cylinder and regulator to use for casting. i am
well acquainted with the flame characteristics of acetylene and
propane but not hydrogen.
after a little experimentation, i’ve found the cleanliness of
the flame wonderful but have found that the reflection of the
flame off the crucible seems to be much greater than that of
propane or acetylene. i’ve set the hose pressure to 20lbs, the
oxy the same. this is probably excessive but i don’t really know.
my fuel supplier has been marginally helpful. other than a msds
sheet and what i already know, i’ve been on my own until i’ve
posed the question to my fellows here on orchid.
other than the safety and chemical characteristics of hydrogen
available on an msds sheet, what are the flame characteristics?
for example, is it similar to propane in that the flame is a very
consistant temp throughout, or is it like acetylene, with a wide
variance of temp? my observation is that it seems to be less hot
at the tip of the flame than near the tip of the cone. but it is
only a guess. the great reflection of flame off of the crucible
is no guess! it really has some extension. what are typical
regulator settings used for a hydrogen/ oxy set-up? certainly
less oxy is neccessary than other fuels.
i’ve used this set-up for about 3 melts and am really impressed
with the cleanliness of the flame but find it a little awkward
because of my inexperience with this fuel.
what is the word from other hydrogen users? your comments to add
to my experience will be extremely helpful. thanks!