stainless heat exchanger with explosion bonded Ti tube sheets

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I thought you fellas n ladies would like to see these there pretty interesting to weld up.The tubes are gr.2 Ti 049 wall thickness welded to 3 1/2 in thick tube sheet thats faced with around an inch of ti on the face.Its 6ft in dia. 35Ft long.2639 Ti tubes in each end and total of 4 units. Attached ImagesLast edited by B2N3 Welder; 07-09-2007 at 12:03 AM.
Reply:looks like a fun job.  Heat exchanger for what?DewayneDixieland WeldingMM350PLincoln 100Some torchesOther misc. tools
Reply:You're not using an automated "tube welding head"?http://www.arcmachines.com/Pages/screen3.html
Reply:Do you have any idea as to how much $$ one of those goes for?
Reply:I applied at a place a few years ago that made those.  They had orbital welders that welded the ends of the exchangers.  It was a pretty slick setup.  I had to turn them down because of the wage they offered and the job distance.  The weld test I took was A-36 to 308 s.s. both mig and tig.  They had quite a few specialized pieces of equipment for exchangers.  It was a pretty cool looking shop.Common sense in an uncommon degree is what the world calls wisdom.
Reply:Littlefuzz heatexchanger for chemicals as far as what kind i dont have any idea.Pulser No we dont use machines its all hand welded except the long seam on the shells.I have used Lumburdi tube welders be for except we dont have one here at this co.Tanky around a million in tubes and i imagine an aweful lot in the 316L stainless also i recon i could ask how much ill find out today if at all posiblethis is the first time i ever remembered to take pics before the bundle was stuffed full inside the shell.
Reply:Originally Posted by tanky321Do you have any idea as to how much $$ one of those goes for?
Reply:1) that is awesome2) i thought someone was messing with me the first time i heard about explosion welding metal because it is entirely too bad ***.with full intent and better sense to recognize what is false and part with it.
Reply:That explosion bonding is awesome, I would like to actually watch it being done. We got a tantalum repair job in the shop,I dont know if im allowed to take pics of or not yet its definately not gonna be easy or fun. Oh and so far 10,000 tube welds have been made and only 20 bad welds thats not to bad i dont think! There repaired now
Reply:hican u help me for make a plan fabrication for heat exchanger (shell tube)tanks
Reply:Really?  What is the application?  Wouldn't have anything to do with nuclear setups?Hobart LX235Victor 250 Oxy-Acetylene Rig (welding and cutting)Bobcat 773F-350, 1999, 4x4, 16' 10K# trailerOutdoor Wood Burner - 10 cords/year
Reply:Originally Posted by pulserNo kidding, you are right $$$!  But, for something as expensive as a huge Titanium tube heat exchanger, it may pay to rent a tube weld system in order to make perfect weld, after weld, after weld, the first time.
Reply:OK "explosion bonded/welded" really got my attention! What is it? Pic's?200amp Air Liquide MIG, Hypertherm Plasma, Harris torches, Optrel helmet, Makita angle grinders, Pre-China Delta chop saw and belt sander, Miller leathers, shop made jigs etc, North- welders backpack.
Reply:Looks like the Ohmstead shop in Beaumont, Tx.
Reply:I once got to clean a condenser on a steam ship.  It was 3000 tubes, copper nickel in a bronze tube sheet with a bronze shell.  One of the most awful jobs I've ever done  (did almost all of them in 8 hours).  There were no welds, though.  The tubes were swaged into the sheet.  In fact, I'm supprised to see welded tubes anywhere.  Heat exchangers need to be able to grow.  One side may be welded but the other side will be swaged in order to let the tubes slip.  I will say that the tubes in the superheater of the boiler were welded but they had a u-bend to them.  The generating tubes in the boilers were all swaged.
Reply:yess!!! its about time someone else on this forum build chemical equipment. You wouldnt happen to be working in wooster ohio would you?  and for all wondering about the automated orbital machines, we have two machines but welding tubesheets with upwards of 1,000 tubes its faster by hand especially with exotic alloys.  mainly because of purge times and size of manual welding cups.none the less still happy to see someone else working on the equipment i build.6G zirconium 702 GTAW 2" xxheavy6G P.E.D. carbon steel GTAW 2" xxheavy3G titanium Gr. 2 - Gr. 7 GTAW up to 3/4" 3G 316L stainless GTAW up to 1" 3G carbon steel GTAW up to 1" 3G Hastalloy GTAW up to 3/4"1G tantalum GTAW up to .060"
Reply:Looks like a cool project. Looking good.        Sincerely,             William McCormick
Reply:Originally Posted by 76GMC1500I I will say that the tubes in the superheater of the boiler were welded but they had a u-bend to them.  The generating tubes in the boilers were all swaged.