Team has anyone built/used a forge powered by natural gas. I dont6know if it burns hot enough or requires forced air or what. Just wonder if I could get by this way to quit buying propane.  Thanks 

Suggested reading:

http://www.iforgeiron.com/topic/44420-propane-vs-natural-gas-forges/

 

or you can look into the commercial johnson gas forges as were used in most middle schools' metal shops when I was attending them.  How large of a gas pipe do you have access to?  I had friends who used to blow glass using NG but they had a large high pressure service rather than the typical house one.

I came across this discussion on reddit:

https://www.reddit.com/r/Bladesmith/comments/4wmdhf/first_forge_question_chimney_bricks_or_some/d6fc3cm

...the poster there runs a NG forge off a BBQ line with regular residential pressures. It's a blown forge, and he uses a furnace air-inducer motor that can be speed controlled with a simple dimmer. He has some details and photos in his post, but what it seemed to boil down to is for him hooking NG into a regular blown burner config worked great, no extra-special high pressure NG line, not even plugged direct into a 1" pipe.