- Thread starter bigbadbugga
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English Steve
Senior Bumpkin
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For portability, you could easily convert one of those 'step-climber' type sack trucks into a bottle trolley.
Steve
Steve
When I was much younger, we used to cut up scrap cars on people's drives and weigh in the bits (with their permission, of course!). One day the van broke down, but we continued cutting till we ran out of oxy. My accomplice then rolled the empty bottle 5 miles to the scrappy to get it filled. (He cadged a lift back, though.)
Those were the days!
Those were the days!
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When I was much younger, we used to cut up scrap cars on people's drives and weigh in the bits (with their permission, of course!). One day the van broke down, but we continued cutting till we ran out of oxy. My accomplice then rolled the empty bottle 5 miles to the scrappy to get it filled. (He cadged a lift back, though.)
Those were the days!
shame it wasnt all down hill
premmington
Member
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We only use oxy-propane for heating and cutting in out auto repair workshop. We stopped having acetylene years ago when we bought a MIG.
I've never needed to do much brazing, in the 22yrs we have been car repairing.
http://www.remmington.plus.com
I've never needed to do much brazing, in the 22yrs we have been car repairing.
http://www.remmington.plus.com
premmington
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Never thought about using medical oxygen bottles with propane. Are the contents of medical bottles, 100% Oxygen or is it diluted by percentage with nitrogen...?
gavuk
artful-bodger
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does it look different? ,,,maybe used in different ways ..i haven't done brazing for nearly 20 years,mig took over at work for lighter jobs ,we had gas welded or brazed up..remember rebuilding bike exhausts for co-workers ,filling holes in perforated steel etc......like oxyacetylene welding adding filler rod to edge of plates creating a build up etc rather than just capillary action between plates which is how i've seen mapp gas used on pipes like plumbers do with general areas being heated rather than concentrated small area,so i was interested in style of brazing done with alternative gas to acetylene,and we've always used different nozzles for oxy/propane cutting ,do people who oxy/propane ,oxy /mapp braze use oxy /acetylene welding torches/nozzles or is there something different available...by asking for pics i was trying to see what kind of work had been brazed without acetylene ,hope this makes sense
shenion
Tool Pack Rat
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I used the regular welding tips on my O/A setup for brazing.
I tried cutting and it was sloppy and the the flame was easily blown out. Sucked my small oxy tank down real quick Was going to try and find some propane cutting tips, but have since gotten a plasma cutter.
I did a lot of oxy/MAPP brazing; was all I had for years. Used disposable bottles. Oxygen was good for about 15min and was $8. Allowed my to fix the flanges on my GPz exhaust.
I'd do a sample with O/P but my oxy tank is still empty. I also got 6, 36" bare brazing rods for $6 off ebay. Will try TIG brazing next time.
I tried cutting and it was sloppy and the the flame was easily blown out. Sucked my small oxy tank down real quick
Was going to try and find some propane cutting tips, but have since gotten a plasma cutter.I did a lot of oxy/MAPP brazing; was all I had for years. Used disposable bottles. Oxygen was good for about 15min and was $8. Allowed my to fix the flanges on my GPz exhaust.
I'd do a sample with O/P but my oxy tank is still empty. I also got 6, 36" bare brazing rods for $6 off ebay. Will try TIG brazing next time.
gavuk
artful-bodger
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some of the re-fridgeration engineers did some tig brazing, seemed to work ok..on copper pipework........if u weren't across the pond i would send you a couple of cutting nozzles shenion .....works very well ,but i can't compare to acetylene as we don't keep it at work,,,,,,however we do still have powder flux i'll see if we got welding nozzles at work and some rods give it a go ,,,,,thanks for advice/comments ....gav
.....works very well ,but i can't compare to acetylene as we don't keep it at work,,,,,,however we do still have powder flux i'll see if we got welding nozzles at work and some rods give it a go ,,,,,thanks for advice/comments ....gav
shenion
Tool Pack Rat
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s......if u weren't across the pond i would send you a couple of cutting nozzles shenion
I have a Chinese "Victor compatible" O/A set. Came with no instructions or specs. have tried a few Victor nozzles but they are all too big. Thanks for the thought of sending me tips
I tried O/P brazing a few times. Worked ok, you did want a bit more heat as it took a while to get up to temp. My rods were probably 10 years old, flux was a bit dried out.
Oxy/MAPP was probably abou the same temp as O/P but my torch was so small it took forever.
I did get a acetylene tank cheap but never have had it filled. One of these days I'll get them filled.
Really the main reason I have the O/A set is my Jeep. No rust (much of the body is fiberglass), but the bolts/nuts are the worst quality i have ever seen. Replaced much of the suspension last year, had good size pile of bolts/nuts that were split (nut splitter), sliced (die grinder/cutoff wheel), burned (torch) or broken off (breaker bar with 5' piece of pipe.)
Will try TIG brazing sounds like it may be ideal for fixing cast iron.
gavuk
artful-bodger
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cast iron ,is a tough one good luck with that ,haven't really had the need personally and at work its normally replaced for new ....did see the results of a metalstitching repair carried out on an enormous paving slab press once which was 50 years old,had a 4 ft bore machined in used as a hydaulic cylinder and was supported by a shaft (on one side) which was 18" dia which was heated red hot to expand (about 6")and the nut tightened down and allowed to contract again,so casting was under a lot of stresses,repair was good and machine went back in production .....very impressed as casting was very thick and repair was carried out in situ by specialists....hopefully your cast iron job will be easier
Dunno about joining copper pipes by brazing, but copper can be TIG welded (takes a lot of heat) and need to use de-oxed copper rod, natch). A little about this in the Ron Covell Tig Welding Basics video, along with the man welding 2 razor blades together and -- party trick only -- aluminium foil.
,but have come across tig brazeing on another job,,,,,
