oxy brazing silicon bronze ??'s

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I'm trying to O/A  silicon bronze (braze) some pipe fitting's together. I am using a oxidizing flame, preheat the base metal, and the rod, and when I try to start a bead all I get is a blob(no flow). I'm pretty sure my tip size is big enough. I can not find a definite answer on using flux or not??, I'm guessing that the rod may be for tig only. I know how to gas weld but I have never attempted silicon bronze before. I appreciate any help....Lincoln pro mig 180Lincoln Square Wave Tig 300/wp 20/home built water cooler Victor, Purox, Harris, O/A welding/cutting setupsVintage Craftsman drill pressVintage Craftsman/Atlas 12"x 36'' lathe7''x 12'' w/c band saw Everlast 140 st
Reply:is the rod bare rod or coated brazing needs flux.....either fluxed rod or powder form (you heat rod an dip in fluxidealarc 250/250 ac-dc tigidealarc 250/250 ac-dc tig #2 used for sticklincoln sp100hh125dual arbor grinder polisher30 yrs of hand tools52 pitch blocks 6p-26prake gauge -pitch gaugeG&D prop repair 918-207-6938Hulbert,okla 74441
Reply:The rod is not coated it is bare and shiny. What type of flux should I use??Lincoln pro mig 180Lincoln Square Wave Tig 300/wp 20/home built water cooler Victor, Purox, Harris, O/A welding/cutting setupsVintage Craftsman drill pressVintage Craftsman/Atlas 12"x 36'' lathe7''x 12'' w/c band saw Everlast 140 st
Reply:brazing flux can be found at your LWS, one little jar will last foreveridealarc 250/250 ac-dc tigidealarc 250/250 ac-dc tig #2 used for sticklincoln sp100hh125dual arbor grinder polisher30 yrs of hand tools52 pitch blocks 6p-26prake gauge -pitch gaugeG&D prop repair 918-207-6938Hulbert,okla 74441
Reply:Are the pipe fittings silicon bronze, too?
Reply:why are you using an oxidizing flame? i use a neutral flame to braze. ive wondered myself if silibronze will oa braze, it is very nice to tig with.
Reply:Originally Posted by weldbeadwhy are you using an oxidizing flame? i use a neutral flame to braze. ive wondered myself if silibronze will oa braze, it is very nice to tig with.
Reply:Originally Posted by welds4dAre the pipe fittings silicon bronze, too?
Reply:Originally Posted by DemonSpeederWeldbead I actually ended up using a neutral flame with a little bit extra oxy;just enough to make the torch sort of hiss a little.