At 12:54 PM 6/25/02 -0500, you wrote: >Don't think I will try, but according to the instructor, >you can weld tanks which have already had fuel in them, >by filling them with water. I've heard of steam cleaning plus filling them with CO2. People have died doing things like this. Say, anyone have any first hand knowledge of flashback arrestor design? I'm trying to cob one together for a small Hyrogen-Oxygen torch. Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com 9/11 United we Stand -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu