Silver Solder Joint

[FrostGiant]

If silvering SS tubing to a plate heat exchanger, which would produce the strongest joints?

Flush or chamfered tubing on the male end going into the connection?
Flush or chamfered female socket on the HX connection?

[pecmsg]

If silvering SS tubing to a plate heat exchanger, which would produce the strongest joints?

Flush or chamfered tubing on the male end going into the connection?
Flush or chamfered female socket on the HX connection?

Look on the J W Harris’s web site. Plenty of videos available.

[71CHOPS]

Just do a good job brazing and it doesn’t matter.

Stainless melts quickly if you apply too much heat in one spot. Just get the solder into the base of the cup, and you’ll be fine.

Sometimes brazing stainless is more like welding....you have to push/follow the rod around the joint, unlike copper, where you can heat one side and fill the whole cup. If it starts to glow orange, pull back, let it cool a little, then go back in.

[pecmsg]

This is Copper to Steel but the same principals apply
http://www.harrisproductsgroup.com/e...-to-steel.aspx

[71CHOPS]

I’d like to see that joint cut apart. They never got the heat much lower than the face of the steel nipple. There’s prolly only 1/4” of solder down in the steel.

[pecmsg]

I’d like to see that joint cut apart. They never got the heat much lower than the face of the steel nipple. There’s prolly only 1/4” of solder down in the steel.

Although I agree
In reality that’s all you need!

[madhat]

Most of the time I'd put away the Oxy-Acetylene, pull out the Turbo Torch. I'd also pick up a Brand new jar of the White Brazing paste, use the highest content thin silver braze wire, I could get. Most of the time it was on my truck. Wet, fold over and tie a diaper wipe around the plate exchanger just above the nipple, but not touching the nipple.

[FrostGiant]

I went at this the other day. I was using weld adapters for the transition to the tubing, there was a much larger gap than normal as they have different dimensions. Just took a bit more silver to fill.

Turns out, the inside of the HX connections were not flush anyways, they were on angled. I left the outside connection flush and all went well.

I use turbotorch 90% of the time, but for this I used the oxy. Much more control and precise.

[71CHOPS]

Glad it worked out for you!!

I suck using a turbo torch...too much heat everywhere for me!! LOL!!