OllyOz

Many thanks for your advice tink the NARBs look interesting and certainly make sense, I just won’t use this forge often enough to warrent investing too much time into researching the best forge so just keeping it simple for now I’ve seen the brick pile types forges and had considered it The forge I had in mind wouldn’t be entombed in the 4mm steel, the top section would unbolt allowing full access to replace the brickS etc

Many thanks for the reply frosty, much appreciated I think you’ve answered everything to be honest burner position should be centred and towards the top of forge, got that 1” burner is plenty, check IFB, I’ve no idea of target temp having never run a gas forge before. I’ll just run the highest grade therefore I should have specified I intended to put the ceramic wool outside the IFB as additional insulation not within the chamber. The question only related to wether this extra insulation would be beneficial or have negligible effect considering the IFB is already 3” thick.

Hi all, I'm going to keep this really brief as I know this subject has been covered to death I’m building a gas forge, the internal dims of the chamber will be 6” x 6” x 13.5” long. Opening 4” x 4” It will be lined with insulating firebrick within a 4mm steel box I intend on using a single Amal burner fed in through the side of the forge Questions 1. Is there an ideal location for the burner ie towards front or back? 2. I have a load of ceramic wool left over from a job, as well as the 76mm thick IFB is it sensible to back this with a few inches of insulation? 3. I have an option of 4 grades of brick from my supplier rated at 1260, 1430, 1530, 1650 degrees centigrade. Obviously there a price difference so realistically what would be most sensible to use? 4. The internal volume in cubic inches comes out to around 486 so by both the calculations of Tim Gunn and Frosty this indicates a 1” burner would be a sensible choice if I have my calculation correct? This forge is for occasional use as a tool that’s part of a larger varied workshop not for everyday forging. Max bar to be heated around 40mm. Do not require welding temps. Quick heat up and efficiency are primary requirements