Tube ends such as those of boiler tube banks, are prepared utilizing any
of various combinations of processes which include a step of
micro-diameter tube film removal from a portion of a tube end, including
an area below a beveled segment, or segment to be beveled. The
micro-diameter film removal step provides the tube with an exposed, clean
metal surface which is conducive to a subsequent welding or bonding
operation performed on the tube. Preferably, the process is performed
with a tube milling tool having interchangeable milling or cutting heads.
A specialized milling head is also disclosed and, in one embodiment, is
at least used to perform the micro-diameter tube film removal step.
Advantageously, the tube film removal milling head also removes a weld
overlay on one or both sides of a tube in one embodiment. The tube film
removal milling head includes an attached blade having a planar face
configuration which enables tube film removal.