Topic profile page for Acetylene.
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Topic "Acetylene" was discussed 2,224 times on 546 sites in last 3 months
Started 3 days, 2 hours ago (2009-12-02 18:28:00)
by pantsboy
I was reading a chapter on Alkynes in my Org chem book when a question arose. I read that traditionally acetelyene can be prepared from ethyelene as such: Ethene Acetylene + H 2 (1150°C) And the reverse of the reaction is hydrogenation while using a lindlar catalyst: Acetylene + H 2 Ethene (cat. Lindlar) Obviously the second reaction takes severly less energy to happen because ...
Started 4 days, 15 hours ago (2009-12-01 05:10:00)
by kiamaian
Many years ago I had the experience of welding lengths of mild steel pipe together to make refrigeration coils. I used conventional oxy-acetylene equipment and held the pipe a couple of millimeters apart when starting the weld to ensure good penetration. I now want to do a similar task only this time I am using one inch diameter stainless steel pipe and butt elbows and I am using a Henrob ...
Started 1 week, 1 day ago (2009-11-27 11:09:00)
by psrumors
Looking to buy an Oxygen Acetylene setup. Would prefer a complete system, tanks and all. Am also looking for a MIG welder, prefer 220 and name brand like Lincoln, Miller, Etc. Have a few pistols I could be tempted out of such as; 8" S&W 44 mag 629 Glock 36 Kimber Ultra Tac Sig p220 22lr NW GA is a plus but will travel some.
Started 2 weeks ago (2009-11-21 00:10:00)
by HOGSEYE
Oxy-acetylene cutting set Got a mini cutting set up for sale as i am now using full size cylinders. works perfectly and will cut thick beams if req, takes smaller size oxygen and acetylene cylinders, which fit on the trolley. set is ready to use (minus cyls of course) with cutting torch, regulators (that can be used on full size ...
Started 2 weeks, 1 day ago (2009-11-19 21:31:00)
by eligray
Was just looking across craigslist, found this: http://sfbay.craigslist.org/pen/tls/1472951346.htm l Will an acetylene torch without oxygen be better than the oxy/MAPP setup I'm using at present? Will it even work for phase at all? Thanks for the help guys
Started 2 weeks, 2 days ago (2009-11-18 20:51:00)
by HAL 9000
a Lincoln AC 225 S Victor SR-260 A gauge Victor SR-250 C gauge 4 different torches 1 cutting torch helmut and 2 set of goggles 15ft hose tall oxygen tank shorter acetylene tank both more than half full both welders only used twice 512 289 6467 wes...
Started 2 weeks, 6 days ago (2009-11-15 08:34:00)
by lou_skywalker
Acetylene gas (ethyne; HC≡CH) burns in an oxyacetylene torch to produce carbon dioxide and water vapor. The heat of reaction for the combustion of acetylene is -1259 kJ/mol. (a) Calculate the C≡C bond energy. (b) When 716.0 g of acetylene burns, how many kilojoules of heat are given off? So I got the equation 2(C2H2)+5(O2) :rarrow:4(CO2)+2(H2O)...but no idea what to do with it :S
Started 3 weeks, 1 day ago (2009-11-13 13:49:00)
by Eric DeSilva
...not really a power tool, but thought I'd see if anyone knows the answer. I've often heard a rule of thumb that a flow rate of less than 1/7 the tank volume per hour is required for acetylene if you don't want something bad--like the tank exploding--to happen. Anyone have any idea what that 1/7th would be in terms of PSI at the torch for a B-tank?
Started 1 week, 1 day ago (2009-11-27 11:23:00)
by mandark
Where Chip Foose (possibly his Dad?) painted a steering wheel faux wood? He used soot from an acetylene torch and a feather as part of the process. Cant remember which episode it was.
Started 3 days, 6 hours ago (2009-12-02 13:58:00)
by Gozuki
New regulators for sale. One each, Victor brand. New Victor SR 250D Air regulator $100 shipped in the USA. New Victor SR 253D CO2 regulator $100 shipped in the USA. New Victor VTS 460A Acetylene regulator $150 shipped in the USA. Please post up if you want one, and email me at gozuki@hotmail.com
Started 3 days, 9 hours ago (2009-12-02 10:58:00)
by SundownIII
kia, If this is a "one time" requirement, I'd suggest you find someone to tig weld the pipe for you. I'm sure there are guys on here that could gas weld it (not me), but I also suspect you'll destroy more material (considering the cost of SS pipe) while learning, than it would cost you to have someone tig it. Always helps to post up your location.
Started 2 days, 21 hours ago (2009-12-02 23:45:00)
by pantsboy
oh duh sorry it's been a while since I've done any general chemistry. that makes sense though. i was confusing equilibrium stuff with thermochemistry by thinking that whatever side of the reaction is favored under STP must be due to the it's heat of formation. thanks
Started 1 week ago (2009-11-28 04:43:00)
by leo_lunar_tick
Quote: Originally Posted by grizzle I also like how in the NIST computer model on old #7 it says that heat builds up in one spot in steel instead of radiating out through it. That's groundbreaking work. Now I can hold on to one end of a piece of steel and cut it with an acetylene torch, and not even get burned. Thanks NIST! I'll have ...
Started 1 week, 1 day ago (2009-11-27 17:34:00)
by pipes
Originally Posted by Summitric DO YOU HAVE AN OXY/ACETYLENE TORCH SOMEWHERE AROUND YOU? IF SO, JUST BREATH IN SOME OF THE OXYGEN..........WORKS, TRUST ME! OTHERWISE AND NICE GREASY/MESSY BIG MAC TOPPED OFF WITH CHOCOLATE MILK SHAKE, THEN A LOT OF TUMS............. Not a good Idea. Oxygen for OXY/ACETYLENE may contain traces of what ever they were filling before. Chlorine, ...
Started 3 days, 10 hours ago (2009-12-02 10:08:00)
by usmcpop
Here's an overview of oxy-acetylene. Pay particular attention to the info about not opening the acetylene tank valve too much or allowing the output pressure to exceed 15 PSI. http://www.metalwebnews.com/howto/weld/weld.html
