>If the flow is turbulent anyway the bead should hardly be of importance.
Be careful in specific circumstances. For cultural value a water line in
my home eroded clear through about a year ago. The plumber who fixed it
told me that a burr on the cut pipe at the solder joint was responsible.
I heard one time that flow velocity affects corrosion for certain metals,
copper and copper nickel alloys among them, and it looked like a good
example. The burr resulted in a locally higher flow velocity and
tubulence which scrubbed the area clean. The joint was at one end of the
run of a tee which had been used as a branch connection, so there was
additional turbulence caused by flow from the tee branch out through the
run. By the time I noticed the pinhole leak which eventually (about 25
years) formed, one whole side of the pipe was paper thin.
I had a neighbor split the joint, and the eroded area extended 2-3 diameters downstream which I figureis about the extent of the major influence of local turbulence due the separation
Christopher Wright P.E. |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen. ___________________________| John Sedgwick, Spotsylvania 1864)http://www.skypoint.com/~chrisw Received on Mon May 17 11:13:00 2004
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