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Hi, I would appreciate some advice on changing my Oxy Aceyt. setup to Oxy Propane. I changed the tip, using a no 1 to cut 1/4 steel Wondered about pressure settings? Seems to take forever to pre heat the edge Then looks too hot when cutting. Do you just expect a much poorer quality cuts with Propane? Would outside in the wind have an adverse effect? Thanks for any information,
Reply:Look up the charts for your particular torch - each company has charts for their tips and thicknesses to cut.Oxy/propane is not a poor quality cut - the oxygen still does the "cutting" so that part is the same.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:A number "0" tip would be better for 1/4". I run 10 & 30 or 40 for the pressures. Thinner range of the tip is 30 and thicker range of the tip is 40. Make sure you have your flame set correctly. Below is a vid which explains it. Yes, you will need a little more preheat. As far as quality of cut, I prefer propane because I think it cuts cleaner. Here are some cuts I did on 1" with propane. http://weldingweb.com/vbb/showthread.php...uot&highlight="Where's Stick man????????" - 7A749"SHHHHHH!! I sent him over to snag that MIC-4 while tbone wasn't looking!" - duaneb55"I have bought a few of Tbone's things unlike Stick-Man who helps himself" - TozziWelding"Stick-man"
Reply:Cut quality should look as clean or cleaner than acetylene-fueled cuts. Start your preheat just on the very edge of the steel, with the edge of the flame. If you use the whole flame on the steel for preheat, you'll have an overheated section to cut through which will look bad. Propane's flame is cooler, but the volume of heat is much higher. You don't need to hold your tip 1/4" off the steel like with acetylene -- you can hold it an inch or more off if you like.Pressures - hard to say. I'm using a fuel regulator that goes to 150 psi so it's a little hard to dial small numbers in precisely. I expect I'm running 8-10 psi on fuel, and 35-40 on oxygen.
Reply:Here is a good video on the subject. Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Originally Posted by CEPHere is a good video on the subject.
Reply:Acetylene regulator is fine, and you can ignore the red zone - that danger zone is for acetylene only.Propane will not freeze - its boiling point is -44 deg F.Note: you can draw the vapor faster than the air can heat up the tank (to heat the liquid) - the sides will frost up and you'll stop getting vapor pressure. The closer to -44 outside, the easier it is to overdraw the tank. Bigger is better in the cold - 100 lb cylinder is hard to over draw in the winter. I use an aluminum forklift cylinder too (better heat transfer). Little 20 lb tank the rest of the year.Last edited by MinnesotaDave; 01-22-2014 at 11:47 PM.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Originally Posted by JoseyIs it ok using the aceytlene regulator for Propane? .
Reply:Originally Posted by SuperArcAs others said, using the same regulator is fine. However, you need to change to grade "T" hoses for oxy/propane because propane gas degrades the oxy/acetylene hose, which is grade "R."
Reply:Originally Posted by Burpee. . .I can show you R hoses 20 years old on propane. . . .
Reply:My Airco tip chart says for 1/4" use a no. 0 tip and 2 pounds propane, 35 pounds oxygen.I use oxypropane for cutting and greatly prefer it to acetylene although it does take longer to preheat.Maybe all the books and teachers are wrong and I don't need to use grade R hose. But I do anyway. Why take a risk?Many rosebud tips, flushing tips and rivet washing tips which say acetylene will actually work too with propane. Propane is oh my goodness SO much cheaper than acetylene.The ONLY reason to use acetylene gas is for actual gas welding.metalmagpie
Reply:Originally Posted by Burpee"Recommended" I can show you R hoses 20 years old on propane. It's just business.In the land of Duh Fee you'd better have the right hose. The bank that REALLY owns your house and it's criminal insurance cohorts insist ! That's if your handlers even allow you to have tanks at home.
Reply:Originally Posted by SuperArcOP, switch to grade T hoses if you're using propane.
Reply:Originally Posted by SuperArcYeah and I can show you grandma with balls too, she's now grandpa.OP, switch to grade T hoses if you're using propane.
Reply:I wonder if the propane is going to cost more then acetylene ? http://weldingweb.com/vbb/showthread.php...ay-5-95-a-gall
Reply:Originally Posted by Gerry1964Yep I agree with Superarc, You need to change your Hoses, In the UK acetylene is red and Propane is Orange
Reply:Originally Posted by CEPYeah, way play with fire? Do it right, get the correct equipment!I switched to propane a few years ago, it does make nice cuts. |
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发表于 2021-8-31 22:36:07