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Tool Talk Discussion Forum

MAAP vs propane

Hersel · 2007-12-12

Advantages - disadvantages of MAPP vs propane? Hi Hersel, It depends on if your talking LP/Oxy(4380�) or Propaylene/Oxy(5900�) VS Mapp/Oxy5300�) or Acet/Oxy5900�). Propaylene is a mix of LP and Xzylene. It comes premixed or DIYS mix with a cylinder adapter. Costs about twice of straight LP and 3/4 the cost of acetylene. Acet/Oxy has a huge welding/cutting advantage as it requires less flame spread for the same BTU reqirement thus will cost less perunit(cft). For production welding/brazing/cutting then Propaylene would be a consideration to keep costs down. For a small shop that uses 2 cylinders of Acetylene year, buy the Acetylene. T_Bone Hi Hersel, It depends on if your talking LP/Oxy(4380�) or Propaylene/Oxy(5900�) VS Mapp/Oxy5300�) or Acet/Oxy5900�). Propaylene is a mix of LP and Xzylene. It comes premixed or DIYS mix with a cylinder adapter. Costs about twice of straight LP and 3/4 the cost of acetylene. Acet/Oxy has a huge welding/cutting advantage as it requires less flame spread for the same BTU reqirement thus will cost less perunit(cft). For production welding/brazing/cutting then Propaylene would be a consideration to keep costs down. For a small shop that uses 2 cylinders of Acetylene year, buy the Acetylene. T_Bone Hersel: assuming you re discussing the common hand-held torches with a cylinder about the size of a 1-liter soda bottle, the basic differences are MAPP is hotter but costs more, as was covered already. One other thing to think about--while the common torches will work for either gas, using MAPP in a torch not designed for it will burn out the torch much faster. Best thing to do if you plan on using MAPP very much is to spend around $50 for a decent torch (Weller is one of the better known brands, though of course there are others) made for it. You can then use both MAPP and propane without fear of premature torch failure. I keep a MAPP torch around for when propane isn t enough and factors such as location prohibit easy use of my O/A rig. Hersel: assuming you re discussing the common hand-held torches with a cylinder about the size of a 1-liter soda bottle, the basic differences are MAPP is hotter but costs more, as was covered already. One other thing to think about--while the common torches will work for either gas, using MAPP in a torch not designed for it will burn out the torch much faster. Best thing to do if you plan on using MAPP very much is to spend around $50 for a decent torch (Weller is one of the better known brands, though of course there are others) made for it. You can then use both MAPP and propane without fear of premature torch failure. I keep a MAPP torch around for when propane isn t enough and factors such as location prohibit easy use of my O/A rig. Where do you get your information from on the torch burnning up/out of what ever you are talking about. I have only bought one new mapp torch tip in 30 years and that was because my grandson was trying to cut without instructions his first time and dropped the tip down into molten metal. I cut and welded hundreds of feet of pipe and never had to buy an new mapp tip. Where do you get your information from on the torch burnning up/out of what ever you are talking about. I have only bought one new mapp torch tip in 30 years and that was because my grandson was trying to cut without instructions his first time and dropped the tip down into molten metal. I cut and welded hundreds of feet of pipe and never had to buy an new mapp tip. Dick Lemmon: My post was in reference to the small plumber-type torches that screw directly into the top of a gas bottle. If you have one of these torches that is designed for propane-only use and use it with MAPP gas, the higher heat of the MAPP will cause the torch to fail fairly quickly. From your comment of cutting and welding , I m assuming you are using a hose-fed oxy-MAPP torch, in which case I can t comment on expected torch tip life, as I ve never used that particular setup. Dick Lemmon: My post was in reference to the small plumber-type torches that screw directly into the top of a gas bottle. If you have one of these torches that is designed for propane-only use and use it with MAPP gas, the higher heat of the MAPP will cause the torch to fail fairly quickly. From your comment of cutting and welding , I m assuming you are using a hose-fed oxy-MAPP torch, in which case I can t comment on expected torch tip life, as I ve never used that particular setup. Hi Tim, You can buy a orifice that s rated for Mapp gas for the Benz-O-Matic type of torchs. I bought my torch in a kit that included both orifice sizes for LP or Mapp. I didn t like using Mapp gas for general use tho. If I remember correct, it was because the Mapp gas caused excessive metal sweating before the filler metal could be applied where LP gas won t do that. To many years ago but I think the problem was on a low temp metal I was repairing. As the BTU content of a combustable gas increases, the orifice size has to decrease to stop the very same thing you were talking about, torch venturia melt down! T_Bone Hi Tim, You can buy a orifice that s rated for Mapp gas for the Benz-O-Matic type of torchs. I bought my torch in a kit that included both orifice sizes for LP or Mapp. I didn t like using Mapp gas for general use tho. If I remember correct, it was because the Mapp gas caused excessive metal sweating before the filler metal could be applied where LP gas won t do that. To many years ago but I think the problem was on a low temp metal I was repairing. As the BTU content of a combustable gas increases, the orifice size has to decrease to stop the very same thing you were talking about, torch venturia melt down! T_Bone Hi Hersel, You can get your MAPP bottle refilled at most places that sell acetylene. You can get propane just about anywhere, any time. No biggie if you're only using it in a shop that keeps regular shop business hours. For personal use it might be convenient to be able to get it on the weekend. All the best, Stan Hi Hersel, You can get your MAPP bottle refilled at most places that sell acetylene. You can get propane just about anywhere, any time. No biggie if you're only using it in a shop that keeps regular shop business hours. For personal use it might be convenient to be able to get it on the weekend. All the best, Stan I have used mapp since about 1965. It might be more expensive to buy but am not sure it is more expensive in the long run. A tank of mapp seems to last forever. We dont use the torch a lot here anymore but I have not had a refill in two years. Get an oxygen refill about three times a year. I have used mapp since about 1965. It might be more expensive to buy but am not sure it is more expensive in the long run. A tank of mapp seems to last forever. We dont use the torch a lot here anymore but I have not had a refill in two years. Get an oxygen refill about three times a year. Mapp will burn hotter than propane, but it is also more expensive. Mapp will burn hotter than propane, but it is also more expensive. It does burn hotter which might allow for slightly faster cutting speeds. I worked in a shop that uses it and heard that a shop that builds heavy pressure vessel components uses it. They go through 200 tips a month! It could be that although it's more expensive, it uses less fuel to get the same result. I've heard that different brands of torches can use different amounts of fuel for the same tip size. Dave It does burn hotter which might allow for slightly faster cutting speeds. I worked in a shop that uses it and heard that a shop that builds heavy pressure vessel components uses it. They go through 200 tips a month! It could be that although it's more expensive, it uses less fuel to get the same result. I've heard that different brands of torches can use different amounts of fuel for the same tip size. Dave MAAP burns hotter. Gerald J. MAAP burns hotter. Gerald J.

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Hersel

12-12-2007 11:36:08

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Advantages - disadvantages of MAPP vs propane?

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T_Bone

12-13-2007 18:48:04

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Re: MAAP vs propane in reply to Hersel, 12-12-2007 11:36:08

Hi Hersel,

It depends on if your talking LP/Oxy(4380�) or Propaylene/Oxy(5900�) VS Mapp/Oxy5300�) or Acet/Oxy5900�).

Propaylene is a mix of LP and Xzylene. It comes premixed or DIYS mix with a cylinder adapter. Costs about twice of straight LP and 3/4 the cost of acetylene.

Acet/Oxy has a huge welding/cutting advantage as it requires less flame spread for the same BTU reqirement thus will cost less perunit(cft).

For production welding/brazing/cutting then Propaylene would be a consideration to keep costs down. For a small shop that uses 2 cylinders of Acetylene year, buy the Acetylene.

T_Bone

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TimV

12-13-2007 16:54:46

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Re: MAAP vs propane in reply to Hersel, 12-12-2007 11:36:08

Hersel: assuming you"re discussing the common hand-held torches with a cylinder about the size of a 1-liter soda bottle, the basic differences are MAPP is hotter but costs more, as was covered already. One other thing to think about--while the common torches will work for either gas, using MAPP in a torch not designed for it will burn out the torch much faster. Best thing to do if you plan on using MAPP very much is to spend around $50 for a decent torch (Weller is one of the better known brands, though of course there are others) made for it. You can then use both MAPP and propane without fear of premature torch failure. I keep a MAPP torch around for when propane isn"t enough and factors such as location prohibit easy use of my O/A rig.

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Dick Lemmon

12-14-2007 11:04:38

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Re: MAAP vs propane in reply to TimV, 12-13-2007 16:54:46

Where do you get your information from on the torch burnning up/out of what ever you are talking about. I have only bought one new mapp torch tip in 30 years and that was because my grandson was trying to cut without instructions his first time and dropped the tip down into molten metal. I cut and welded hundreds of feet of pipe and never had to buy an new mapp tip.

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TimV

12-14-2007 11:14:38

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Re: MAAP vs propane in reply to Dick Lemmon, 12-14-2007 11:04:38

Dick Lemmon: My post was in reference to the small plumber-type torches that screw directly into the top of a gas bottle. If you have one of these torches that is designed for propane-only use and use it with MAPP gas, the higher heat of the MAPP will cause the torch to fail fairly quickly. From your comment of "cutting and welding", I"m assuming you are using a hose-fed oxy-MAPP torch, in which case I can"t comment on expected torch tip life, as I"ve never used that particular setup.

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T_Bone

12-14-2007 13:16:35

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Re: MAAP vs propane in reply to TimV, 12-14-2007 11:14:38

Hi Tim,

You can buy a orifice that"s rated for Mapp gas for the Benz-O-Matic type of torchs. I bought my torch in a kit that included both orifice sizes for LP or Mapp. I didn"t like using Mapp gas for general use tho. If I remember correct, it was because the Mapp gas caused excessive metal sweating before the filler metal could be applied where LP gas won"t do that. To many years ago but I think the problem was on a low temp metal I was repairing.

As the BTU content of a combustable gas increases, the orifice size has to decrease to stop the very same thing you were talking about, torch venturia melt down!

T_Bone

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Stan in Oly, WA

12-12-2007 16:41:25

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Re: MAAP vs propane in reply to Hersel, 12-12-2007 11:36:08

Hi Hersel,

You can get your MAPP bottle refilled at most places that sell acetylene. You can get propane just about anywhere, any time. No biggie if you're only using it in a shop that keeps regular shop business hours. For personal use it might be convenient to be able to get it on the weekend.

All the best, Stan

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Dick Lemmon

12-12-2007 13:56:17

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Re: MAAP vs propane in reply to Hersel, 12-12-2007 11:36:08

I have used mapp since about 1965. It might be more expensive to buy but am not sure it is more expensive in the long run. A tank of mapp seems to last forever. We dont use the torch a lot here anymore but I have not had a refill in two years. Get an oxygen refill about three times a year.

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Red Dave

12-12-2007 12:11:52

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Re: MAAP vs propane in reply to Hersel, 12-12-2007 11:36:08

Mapp will burn hotter than propane, but it is also more expensive.

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135 Fan

12-12-2007 13:43:25

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Re: MAAP vs propane in reply to Red Dave, 12-12-2007 12:11:52

It does burn hotter which might allow for slightly faster cutting speeds. I worked in a shop that uses it and heard that a shop that builds heavy pressure vessel components uses it. They go through 200 tips a month! It could be that although it's more expensive, it uses less fuel to get the same result. I've heard that different brands of torches can use different amounts of fuel for the same tip size. Dave

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Gerald J.

12-12-2007 12:11:40

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Re: MAAP vs propane in reply to Hersel, 12-12-2007 11:36:08

MAAP burns hotter.

Gerald J.

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