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Whats up Gentlemen, here with another question: Just got my early xmas present from the girlfriend and its a Smith Medium duty oxyacetylene outfit MBA-3510. The outfit comes with a MT 603 rosebud heating tip. Reference this link for additional info: http://store.cyberweld.com/smhetipmtse.htmlIt appears that this is the smallest heating tip that smith makes for my torch handle. I just picked up a 250cf oxy cylinder and a number 4 acetylene cylinder. It reads on the Acetylene cylinder that its a 145 cf tank. Per 1/7 draw rate rule, I should only draw no more than 20cfh from this tank. Well the heating tip in the literature says it draws 28cfh (reference chart in link). So what are my options? Looks like they don't make any smaller rosebuds for my handle, and I just bought this full acetylene. Is it foolish to ask if Id be alright just using the rosebud with my #4 acetylene? Or am I asking for death?By the way, Id like to plan to bend metal with this heating tip, so I might need to use it for more than just a couple minutes.Dynasty 200DX (2014)Millermatic 211 (2015)Optrel 864 (2014)Smith Medium duty MBA 30510 (Xmas 2014)Tennsmith 16ga 4ft finger brake (2015)Trailblazer 325 EFI and excel Thermal dynamics Cutmaster 82Miller maxtron 450
Reply:You can exceed the 1/7 per hour for short periods with a nearly full cylinder.
Reply:One option if you need to withdraw a lot of acetylene would be to manifold a 2nd cylinder to what you have. That would give you a greater total CF available to work with. Down side is the need to buy not only the manifold parts, but a 2nd acetylene cylinder as well. If you really need a lot of heating to do, this or a larger acetylene cylinder might be one way to go.You may simply find that torch is the wrong size for what you need. Maybe you can still return it and exchange it for a smaller torch body that takes a smaller rose bud. Next option would be to see if it's possible to use what you have with propane and see if your supplier will allow you to exchange the cylinder that you got of Acetylene for a large 100 lb or larger propane cylinder. Most guys who do a lot of heating go with propane so they don't have to deal with the withdrawal rate issue.As mentioned you can get away with using the rosebud for shorter periods of time. Based simply on math, you have about 2/3rds the gas supply you need. I'd say you should be ok for brief periods, say 3-5 minutes at a shot and then letting it recover for the same amount of time. You'll need to watch the flame for signs you are burning acetone though to make sure you are still OK.Down side to rose buds is that they need a lot of fuel gas flow to keep the tip cool and avoid the flame from burning in the tip. Unfortunately you simply can't just back down on the acetylene past a given point or you will have issues and melt the torch tip, possibly the torch and start bigger issues..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Originally Posted by DSWOne option if you need to withdraw a lot of acetylene would be to manifold a 2nd cylinder to what you have. That would give you a greater total CF available to work with. Down side is the need to buy not only the manifold parts, but a 2nd acetylene cylinder as well. If you really need a lot of heating to do, this or a larger acetylene cylinder might be one way to go.You may simply find that torch is the wrong size for what you need. Maybe you can still return it and exchange it for a smaller torch body that takes a smaller rose bud. Next option would be to see if it's possible to use what you have with propane and see if your supplier will allow you to exchange the cylinder that you got of Acetylene for a large 100 lb or larger propane cylinder. Most guys who do a lot of heating go with propane so they don't have to deal with the withdrawal rate issue.As mentioned you can get away with using the rosebud for shorter periods of time. Based simply on math, you have about 2/3rds the gas supply you need. I'd say you should be ok for brief periods, say 3-5 minutes at a shot and then letting it recover for the same amount of time. You'll need to watch the flame for signs you are burning acetone though to make sure you are still OK.Down side to rose buds is that they need a lot of fuel gas flow to keep the tip cool and avoid the flame from burning in the tip. Unfortunately you simply can't just back down on the acetylene past a given point or you will have issues and melt the torch tip, possibly the torch and start bigger issues.
Reply:never heard of the 1/7 ruling till i joined the ww.i.u.o.e. # 15queens, ny and sunny fla
Reply:You know....if you're mainly going to be heating stuff with a rosebud MAPP (or HPG) gas would be a better choice than acetylene for you. It takes different style tips to use it (both for cutting and heating with a rosebud). One big advantage of using that (in smaller sized bottles) is you won't have to worry about that pesky 1/7 with draw rate rule.
Reply:It just dawned on me that I can't recall seeing any discussion of any of the alternative (to acetylene) fuel gases that are out there on the forums in the past year I've been a member. There's some advantages to it (especially from a safety and transportation standpoint) to using it that might make it a better fuel gas choice than acetylene for some of the home / hobby / garage guys. When it comes to doing a lot of rose bud work (preheating and such) HPG and O2 is way better than C2H2 and O2. To start with there's more BTUs in the secondary flame of HPG than there is with acetylene. A bottle of HPG will out last a least 3 comparitable sized bottles of acetylene so there's less logistics involved in bottle handling.
Reply:There have been any number of discussions of the advantages/disadvantages of acetylene vs propane. Other gases such as propylene don't get as much discussion as they aren't always as readily available to many as propane is. When acetylene was more scare a year or so ago, there was a fair amount of discussion of other alternative fuel gases..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Keep for gas welding and get propane tips for cutting and heating . You can use natural gas too. |
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发表于 2021-8-31 22:48:17