Propane forge not seeming to ignite properly | The Forge Fire | Forum

Going forward Dreygan, choke adjustment, gas orifice offset/depth, flow rate & burner end to cone/chamber opening recess ratio all affect the ability of the flame to "cone out" or run a neutral (blue cone)/and or oxygen rich (purpleish) flame.  In my forge I can run it as low as ~2 psi and it'll hold a weak perfectly neutral cone or I can run it at 50psi+ and the ambient temperature causes complete gas ignition when it's entering the chamber.  Very very small tweaks can make a HUGE difference between running efficiently and inefficiently at the seemingly same settings.  Always keep a carbon monoxide detector that updates frequently (I have one that intervals at 30 seconds) handy if you're forging [semi]/indoors in a garage.

-Daniel