Usually mapp gas does not get hot enough to cause a deep bond between the copper and silver filler. I am an engineer and have a healthy respect for doing a job right, ive just been burnt too many times plucking tradesmen from. In addition, i will get a rogue plumber to test the line for me when finished. Longtail bicycle frame build 06 silver brazing seat tube binder with mapp gas duration. Did not mean to offend davo, just that for a start map gas is a longer flame most people hold it too close to the pipe. Also, the gas canisters can be purchased locally at almost any hardware store. Limited brazing when using mapp gas can braze 38 acr tubing using 15% silver. If you brazing is done without nitrogen gas blowing, a large amount of oxide film develops inside the piping, and could cause system malfunction. Mapp gas a hightemperature mixture of petroleum byproducts comes liquefied in compact canisters, which allows torches to operate for several hours, and some of the new instantstart brazing tips are quite inexpensive and very easy to use. Whats the difference between welding and brazing, and when is it acceptable to braze a part over welding it. Special installation instructions are available for a variety of natural gas air systems. Is it realistically possible to braze steel using a standard. Aufhauser silveralloy a56t is a very free flowing filler metal that will provide good joint penetration and alloy flow into joint gaps of between 0. Natural gas is considerably cheaper per cubic meter but you need much more gas and oxygen than you do with acetylene to do the same job.
Brazing applications and advantages how brazing works. Gtec torch boosters connect to a standard utility gas line and boost pressure as high as 45 psi. Google searching this has proven difficult because the common use of bronze brazing sticks used in lots of non bronze base metal. How to correctly braze silver solder a copper pipe. Ive tried to use just normal propane but was unable to get it hot enough. So, today ill be explaining to you how to correctly braze a copper joint. Looking for bernzomatic swirl hand torch w cylinder, mapppro, instant. The torch now runs off pressurized air and mapp gas. I still use my mapp gas on most smaller jobs, the turbo 200 where i need extra heat in a hurry and drag my oxcy out of the office when i have larger install jobs.
I also note that here in tasmania at least, the gas company has a pretty strict rule no compliance tag they wont supply gas. Mapp gas brazing rss sort by sort by title az title za price lowhigh price highlow reference az reference za most recent oldest top sellers featured national refrigerants gas refill mapp gas 16 oz. Starting with lighting the torch, heating the steel to red hot and melting the brazing rod into the. Having been brought up on oxy acetylene i do not like mapp gas for brazing fridge pipe its ok for plumbers but it does too much damage to the pipe for my liking due to the lenght of time it takes to get the pipe up to temperature. Skipping this step may result in an improperly brazed joint. Swirl torch tip installs easily in quickdisconnect handle and covers the largest of soldering projects.
The unit can be easily added to any existing manual or automatic brazing installation and does not require special torches, tips or. Heat the joint where the two pieces of metal will meet until the joint glows. A wide variety of gas flux brazing options are available to you, such as welding torch. Mapp gas for brazing mapp gas is only good for small pipes not more than 58,but a double torch will do the trick with a shield. Liquefied petroleum gas, doyles plumbing and gasfitting and a couple of others. You can but you have to control the environment so that the heat loss to the atmosphere and parts is lower than the heat being put into the braze joint. Sep 21, 2007 is it realistically possible to braze steel using a standard propane torch. Please note this was only done to test the capability of the mapp gas to braze in open air using cheap brass rods and some substitute for borax flux, not expansive dedicated brazing rods, the old.
Brazing the ac system line set while purging with nitrogen using the flow guard duration. I need to attach a section of 516 silicon bronze rod crosswise to the end of another 516 silicon bronze rod. Gas welding, or oxyfuel welding as it is commonly referred to, is slower and easier to control than arc welding. Is it realistically possible to braze steel using a. Mike lang, welding director explains why ua local 501 switched from acetylene to hi pressure natural gas for brazing training. When brazing the refrigerant piping, only begin brazing after having. Have any of you brazed something like a bicycle or a bicycle trailer, that has to take a conciderable amount of abuse, using just a propane torch and the standard tip.
I show how to braze copper line set into service valves while flowing nitrogen to avoid oxida. Just turn the torch booster on at the start of the first shift and off at the end of the day you get an endless supply of highpressure natural gas for your brazing torches. Heat sources include a propane or mapp gas, a turbo tip, or oxyacetylene torch. When soldering copper pipes we like to use mapp gas torch, which comes in a yellow cylinder. Aug 29, 20 longtail bicycle frame build 06 silver brazing seat tube binder with mapp gas duration. It will be used for probably about 15 new installs per year. It can be used for every type of project including electronics. Welding, cutting, brazing, soldering environmental, health. Introduced into the fuel gas, gasflux creates superior wetting action and encourages filler metal to evenly flow into the joint where it is needed most. There are 60 suppliers who sells gas flux brazing on, mainly located in asia. A large swirl flame offers maximum heat output for brazing, heat treating, and light welding. Induction heating provides reliable, repeatable, noncontact and energyefficient heat in a minimal amount of time without flame. Both welding and brazing can be done manually, but brazing is far more suitable for automation.
Automated welding can be accomplished, but it takes sophisticated equipment and a highly repeatable fabrication process. I would reccomend using an acetylene torch set though,clean the fitting shiny,no flux,heat her cherry red and let the silver solder flow like melted butter into the joint. May 27, 2011 there is one propane mapp torch thatll work. During the arc welding process, the filler wire melts at temperatures typically over 1600c, whereas for brazing the wire melts at less than c. Not an issue if youre using 9kg cylinders of course, but it is if you want bigger. Gas does have a pretty good safety record i know, but thats at least partly because not too many people are willing to diy gas. High quality brazing kit complete with torch,rods and flux. Bernzomatic swirl hand torch w cylinder, mapppro, instant. Mapp is a gas mixture created by the dow chemical company that is a combination of liquefied petroleum gas lpg mixed with methylacetylenepropadiene. Brazing and soldering videos application videos fusion inc. However, in the braze welding process, the melting point of the filler wires is significantly lower with relation to the melting point of the parent material. Propane is usually sold in tanks where natural gas is not available. Brazing is the first choice, but i dont have access to o2 assisted gas, just propane or mapp gas. Brazing offers much more flexibility and, as a result, can be set up quickly and costeffectively.
Brazing, however, can readily join dissimilar metals because its possible to find a filler thats compatible with both base metals and has a melting point lower than the two. I have gotten metal red hot using just a propane torch and a standard tip a tip that might be used to solder copper pipes together, whether that was. Ive had a wingaersheek spitfire torch since the early 80s. Is it realistically possible to braze steel using a standard propane torch. The trader papers and other sale sources often have small gasox torch sets very cheap. Finally, a metalworker must consider production requirements. Brazing of tubes, pipes for transporting liquid and gases. Mapp gas can be highly pressurized and stored in the same way as lpg, and it is a favorite of hobby welders. Mapp gas vs propane bread works great to slow a leak before you have to sweat a copper pipe or ball valve. Mapp gas turbo torch brazing solder propane welding plumbing mapp gas torch specification. Sep 01, 2009 mapp gas a hightemperature mixture of petroleum byproducts comes liquefied in compact canisters, which allows torches to operate for several hours, and some of the new instantstart brazing tips are quite inexpensive and very easy to use.
For brazing there are generally two equipment options to choose from. This method unites metals by heating the heat source being a flame produced by the combustion of a fuel gas, such as acetylene, methylacetylene mapp gas, or hydrogen. Cutting heating brazing correct pressure setting charts by. Used with bronze, silver, and coppersilverphosphorus filler. Please note this was only done to test the capability of the mapp gas to braze in open air using cheap brass rods and some substitute for borax. Unless you are nitrogen purging you are going to get far more oxidisation in the pipework than with oxy acet due to. A wide variety of mapp gas options are available to you, such as industrial grade, agriculture grade, and electron grade. If needed, use clamps to secure the pieces in position. The top countries of suppliers are china, taiwan, china, and hong kong s. This means that the joint clearances, fixturing, etc are much more forgiving in brazing than welding. The second is heating up that copper to the best possible temp for bonding basically as hot as you can get it. Here is the answer to whether you can braze with a propane air torch. Gas soldering torch mapp gas self igniting soldering torch used for copper pipe soldering electric soldering kit a soldering kit is a low cost way to get everything needed for most projects.
In most cases, an overlapped joint will be stronger and braze together easier than a gapped joint. Turn up the brazing heat the harris products group. Before brazing local refrigerant piping, nitrogen gas shall be blown through the piping to expel air from the. Brazing is a heating process in which two or more like or unlike materials are joined together by means of another metal alloy with a lower melting point. Specifically designed for trade use in all conditions, brass and stainless body. I think the only problem ill have with the turbo 200 is the oxcygen time only lasts 25min approx. Bernzomatic swirl hand torch, mapppro, instant onoff, 3400. Both welding and brazing can be done manually, but brazing is far. Mapp gas vs propane ridgid forum plumbing, woodworking. This torch is perfect for the hard to get at jobs under sinks, under house and roofs.
View videos of brazing and soldering systems developed by fusion inc. Because brazing involves higher temperatures than soldering, using an oxygenacetylene torch is your surest bet because this gets hotter than a mapp gas or propane torch, although for most smalltomedium jobs thinner copper piping a turbo torch should also work. The gasflux process can be adapted to most systems where the brazing alloys are introduced by preformed rings, wire feed, hand feed, and pastes. Agas uk demonstrates the benefits of using brazeagas. Brazing torch 0 f with a bernzomatic propane torch. Gas valves and fittings made from copper alloys such as brass demand a high level of brazing alloy cover in the joint. If your a professional, you can solder everything but the last fitting or coupling, then you would use the bread to finish that last fitting. Also remember that mapp gas burns hotter than propane. Mapp gas is also used in combustion with air for brazing and soldering, where it has considerable advantages over competing propane fuel due. The second is heating up that copper to the best possible temp for bonding basically as hot as you can get it before the copper itself melts. Apply the brazing rod to the joint while continuing to heat the metal surfaces. Limited brazing when using mapp gas can braze 34 acr tubing using 15% silver. Due to the fact that in brazing a filler metal is always used and generally the entire joint area is heated at the same time, it is a more robust process. Mapp sufficient for silver brazing brass to copper.
If figure that ill rarely ever encounter tubing larger than that. However, mapp torches provide a very hot flame, almost. Replace acetylene, propane, propylene, mapp and other fuel gases with hi pressure, hiperformance, low cost natural gas for brazing and silver soldering. Nov 04, 2016 in this case aluminium aluminum brazing rods are a low enough temperature to use cheap disposable gas cylinders and the map pro mapp replacement is probably just slightly better than the. How to braze metal together brazing metal bernzomatic.
Brazing gases for torch brazing carbide processors. Sep 25, 2011 can i use mapp gas for 15% silver brazing. There are 3 easy steps to getting this accomplished. In this case aluminium aluminum brazing rods are a low enough temperature to use cheap disposable gas cylinders and the map pro mapp. If so, is there a recommendation on the model i will need for brazing a 14 2 copper tubing. Ts4000 with mapp or propane will get copper plenty hot enough to braze it shut with most brazing rods on the market i use a ts4000 all the time and i have brazed several waterblocks shut with it as well as several evaporators for phase change it has also brazed up a ton of flared fittings, etc. Covid19 update fusion open for business as essential manufacturer click here for more information expand menu. The gasflux company process introduces a flux automatically into the flame for manual or automatic torch brazing applications. I use only mc tank and mapp gas, propane is for diyrs. If he is using 5% silver solder or better that is the first half of the equation. Torch boosters deliver gas in exactly the same way as a cylinder or bulk tank,except that you save money and never run out. In this video i demonstrate brazing steel using an ordinary propane torch. Brazing or welding are preferred when strength and permanence are primary considerations.