This is my Cajun fish fry thingie converted to quick and dirty forge 
service.  It was the source for my adjustable pressure regulator and 
long high pressure LP gas hose. (YES. I do actually use proper 
equipment for time to time.)  

I don't remember the actual numbers (whatever it was, it had a lot of 
zeroes between the number and where it said BTU) but it was advertised 
as being able to "bring a 30 gallon garbage can full on cold water to 
a rolling boil in 20 minutes flat." Adding a pressure gage revealed 
the original setting had the fuel set to 10 PSI and it does produce an 
awesome amount of heat.

 It also pigs aluminum and other metals. Photos on those techniques 
AFTER I remember where I left my digital camera.
