Another example of cutting with preheat

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Here is another example of cutting with preheat.... 1/2" plate. http://i147.photobucket.com/albums/r...t/P1010011.jpghttp://i147.photobucket.com/albums/r...t/P1010010.jpghttp://i147.photobucket.com/albums/r...t/P1010012.jpgNo clean up at all on my part.... just a nice clean cut._________________Chris
Reply:Wow! That is nice, I can do that on 3/8", but not 1/2". I will try the pre heat next time, Thanks."If you live in Sacramento you have seen my work."
Reply:Just so there is no confusion..... the machine is doing the cutting and I am providing the preheat with the cutting torch_________________Chris
Reply:Lorenzo,   Is the back torch (one to the left with the big pipe) just feeding oxy, or both oxygen/acetylene. I read somewhere that if you get preheat right you could conceivably run out or stop the acetylene and the super heat in the steel would burn with just oxygen flowing. I've never played around with something like this and don't know if that's true (seeing is believing)..
Reply:Here is another example of cutting with preheat.... 1/2" plate.
Reply:Originally Posted by SandyFor material of that thickness ±, do you set up the cut for normal conditions and the preheat is an added advantage? Or is the cut set up with the preheat as a necessary component of the cut?  I guess what I'm trying to ask is------are there any other adjustments you could have made to that set-up to acheive that quality of cut without the preheat?
Reply:Originally Posted by o.c.d.or stop the acetylene and the super heat in the steel would burn with just oxygen flowing. I've
Reply:Careful,,,  I posted just a suggestion to preheat before cutting or welding about a month ago.  You wouldn't believe the abuse directed at me.  The jist of what I said went right over everyone's head.  They chose to focus on my opinion that contaminants like water, oil, and gases penetrate the surface of steel.  I now hesitate to agree with you that preheated steel cuts smoother, with less slag, using less oxygen.
Reply:FWIW, watching how steel vaults were made, all the plate was cut with a preheat torch running ahead of the cutting torch.They had very little work in final fitting because of the clean cuts.Craftsman 230a Buzz-box,  Lincoln 140T & 180T, Century K2789, PUROX W202 O/A14" cheapo chop saw that cuts straight and square!A toolbox of the cheapest Chinese tools money can buy"Real" tools all old reliable Husky/Craftsman/Proto stuff
Reply:Originally Posted by TopdeadcenterCareful,,,  I posted just a suggestion to preheat before cutting or welding about a month ago.  You wouldn't believe the abuse directed at me.  The jist of what I said went right over everyone's head.  They chose to focus on my opinion that contaminants like water, oil, and gases penetrate the surface of steel.  I now hesitate to agree with you that preheated steel cuts smoother, with less slag, using less oxygen.
Reply:Originally Posted by lorenzoYour thread is what lead me to post the threads I did with regard to this matter..... in one of the threads I even stated that it is not my intention to debate the issue of whether or not steel absorbs water!