Al, you could do like
Tracy did on
his original, wrap a string coated with epoxy around the tube. I hope
that idea it still works, as I did mine that way.
JohnD
Yes; but what
epoxy? Most epoxies lose strength rapidly above about 150F. What
keeps the bead in place at 210F when the pressure is the highest? You
would want to use an epoxy that was good to 300F.
Whether it works
depends on the connection configuration. Just consider the x-sectional
area of the connection, the expected pressure, and the constraints
counteracting the force. Some connections don’t need a bead at all. A
short coupling hose in a straight line where things are constrained at both
ends needs no bead. The pressure forces offset. A longer hose with a 90
degree bend needs a bead or the pressure will blow the hose off the
connection.
Just some
rambling thoughts . .
Al