Morocco Gas Mains!! You must be joking, it would have blown up a long time ago. All the bottles you saw was natural gas, available at every corner shop for £3 per refill. It's used in homes for cooking and heating. For a gas forge u need a slightly bigger orifice and longer burner tube than what you Would use for propane. As for pros and cons only time will tell.
The forge gets to welding temperature in no time but the only problem I found is the welding flux damages the bricks. Does anyone have any idea of what sort of material that would stand flux??
If you built it in the uk, where did you get the lining from? I have been looking for some locally, but no one seems to be able to tell me where I can get it.
back gone the days where you can source things locally , you will need to google ceramic blanket and you will get plenty. The best I could find is this one http://www.ebay.co.uk/itm/121107083350?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 then you will need fire brick for the bottom http://www.ebay.co.uk/itm/25mm-X-11...afts_Other_Crafts_EH&hash=item35c610c82a#shId
Flux is damaging to all refractory materials. High density cast refractory with high alumina content is the most flux resistant (affordable) bottom liner. You could go with zirconium brick . . . which costs about as much as gold brick.
Thanks Gary, I would love to. Where about are you? Maybe if there is enough interest in the forum we could arrange a day around the fire for people this side of the pond.