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Im looking into leasing some cylinders soon and im trying to pair cylinder size with roughly the same time it will take to deplete a 12in. spool of wire. Also using the same principal i would like to have a better idea on pairing the size of oxygen and acetylene to buy making refueling alot more practical, (considering they would used frequently and not moved outta the garage). thanks again,
Reply:Oxy-Acetylene Welding1.1:1 ratioOxy-Acetylene Cutting1.5:1 ratioHowever, normally we go through 1 acetylene to 2 oxygen when cutting.So for every 1-300 C.F. acet. we order 2-300 C.F. oxy. CF=cubic footI can't answer the 12" spool one sorry, never really paid that much attention, but maybe someone else can chime in on that oneSemper FiJesus may have been a Carpenter, but his dad was a Millwright" A grinder and a can of paint, will make a welder what he aint' "I've done so much, with so little, for so long, that now I can do anything with nothing!
Reply:Take shielding gas flowrate and divide that into the volume of gas in the proposed cylinder.  That will give you the amount of time that the cylinder can flow gas at that flowrate.(s) ft3 / (f) ft3/hr = (t) time in hrs = size of cylinder in ft3f = flowrate in ft3/hrt = time in hrex:  An 80 ft3 cylinder flowing gas at 20 cfh will last for 4 hours of arc/on time.For how long a 12 inch spool of solid wire will last, you have to know how many pounds of wire are on that spool (25, 33, 44, etc) and how fast you are feeding that wire (in either ipm of WFS or in deposition rate in lbs/hr).  Both depend on the wire diameter and the amperage/WFS.It is left to the student to determine the possible range of answers, using a matrix of available wire sizes and at least three representative amperage/WFS values for the solid wire type under consideration. Extra credit assignment is to determine the same numbers for both a specific gas-shielded flux-core wire and a gas-shielded metal-core wire.Your homework assigment is due by Monday 13:00.    The best laid schemes ... Gang oft agley ...
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Reply:I didn't expect anybody to figure it out for me, thought maybe somebody had a quick answer guess not.
Reply:Uh, you may just want to do yourself a big favor and buy big cylinders all around and just have a back up!I don't think one could EVER gauge cylinder usage with consumables being every tank has slightly different pressures even for same sized cylinders.I have about 16 cylinders I own and still run out of various gases.This is a futile effort so give it up and be aheadhttp://jackalopefab.com/MM210Synchrowave 200DXMiller XMT350 w/60series feederMiller Bobcat 250 with SGA 100 and spoolgunHTP PlasmaFull Machine shop with everything
Reply:Originally Posted by MoonRiseTake shielding gas flowrate and divide that into the volume of gas in the proposed cylinder.  That will give you the amount of time that the cylinder can flow gas at that flowrate.(s) ft3 / (f) ft3/hr = (t) time in hrs = size of cylinder in ft3f = flowrate in ft3/hrt = time in hrex:  An 80 ft3 cylinder flowing gas at 20 cfh will last for 4 hours of arc/on time.For how long a 12 inch spool of solid wire will last, you have to know how many pounds of wire are on that spool (25, 33, 44, etc) and how fast you are feeding that wire (in either ipm of WFS or in deposition rate in lbs/hr).  Both depend on the wire diameter and the amperage/WFS.It is left to the student to determine the possible range of answers, using a matrix of available wire sizes and at least three representative amperage/WFS values for the solid wire type under consideration. Extra credit assignment is to determine the same numbers for both a specific gas-shielded flux-core wire and a gas-shielded metal-core wire.Your homework assigment is due by Monday 13:00.
Reply:craigslist.....just go buy them.....lol alot cheaper and easier then leasing.I forgot how to change this.
Reply:I would recommend oxy-propane. Propane is much cheaper, available everywhere, safer (NOT that acet is unsafe) and it lasts a long long time.I agree with buying the big cylinders off craigs or anywhere cheap. Just make sure you have a place to get them filled. Usually he mom & pop places will do it."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:As far as the shielding gas goes, just buy the biggest cylinder available and keep a couple of spools of wire on hand. When you run out of gas check you r wire to see if you need more. You could also get 2 bottles of gas and 2 spools of wire, then when you run out of gas swap bottles and refill at your convenience.
Reply:Anybody ever use this?  [ame]http://www.youtube.com/watch?v=YWAnv3r0CSw[/ame]
Reply:I remember when they sold the plant I worked at propylene.They said it was cheaper; hotter & cut faster. All of us in maintenance hated the stuff.Petrogen might be good for demo, but I doubt you can weld with it.I've used oxygen lances for demo before, but I wouldn't want to try and get a nice clean cut with it for fabrication.I think it's just another tool. Here is a site 'GasData". It gives some info on gases.Semper FiJesus may have been a Carpenter, but his dad was a Millwright" A grinder and a can of paint, will make a welder what he aint' "I've done so much, with so little, for so long, that now I can do anything with nothing!
Reply:Should say on your wire package how many feet of wire their is in their, you should be able to generalize or approximate the amount of wire based on common settings then using moonrises calculations figure it out.You will run out of gas first.You still have room to cut the flow.Keep an eye on your wire and buy a spare.Consider propane for torches, a 100lb tank of propane will last forever.
Reply:Just came across your post on the Petrogen torch so I figured I would share my experience with you guys,  I was turned onto the Petrogen Gas torch about ten years ago. Back in the day I handled a whole lot of scrap. Profit margins were low because overhead was high. Acetylene prices are crazy and now gettin worst and if I pulled out the propane my Oxy bill went up 40%.  The gas torch used same SCFH as Acetylene but eliminated filling and renting cylinders completely.  A couple gallons of gas would last from dusk till dawn.  The damn thing is fast, takes a min to get used to the speed. Major diff VS Acet n Propane is flame adjustment.  Few hrs of practice n no problem. I have not used another torch since.  Currently own 3.  prices have gone up over the years, but so has everything else in this crazy *** country.  With the money I have spent on the three torches I must have saved 50X that in gas n oxy savings.  If you use it, it sure dont take long to get ur money back.  I think its still made in the USA and recently heard that they are releasing some new torch or system that runs off  a variety of fuels besides gas. Like military fuels, kerosene, diesal,and some other ones. I'm actually gonna give them a ring next week.  I'll let you fellas know what I find out
Reply:Originally Posted by gott2besafeJust came across your post on the Petrogen torch so I figured I would share my experience with you guys,  I was turned onto the Petrogen Gas torch about ten years ago. Back in the day I handled a whole lot of scrap. Profit margins were low because overhead was high. Acetylene prices are crazy and now gettin worst and if I pulled out the propane my Oxy bill went up 40%.  The gas torch used same SCFH as Acetylene but eliminated filling and renting cylinders completely.  A couple gallons of gas would last from dusk till dawn.  The damn thing is fast, takes a min to get used to the speed. Major diff VS Acet n Propane is flame adjustment.  Few hrs of practice n no problem. I have not used another torch since.  Currently own 3.  prices have gone up over the years, but so has everything else in this crazy *** country.  With the money I have spent on the three torches I must have saved 50X that in gas n oxy savings.  If you use it, it sure dont take long to get ur money back.  I think its still made in the USA and recently heard that they are releasing some new torch or system that runs off  a variety of fuels besides gas. Like military fuels, kerosene, diesal,and some other ones. I'm actually gonna give them a ring next week.  I'll let you fellas know what I find out
Reply:Originally Posted by gott2besafe? Anyone have any feedback on this?
Reply:Originally Posted by gott2besafe? Anyone have any feedback on this?