BUG-O Systems Flame Cutting - Manual (Page 20)

20
b. Place tip half over the edge of plate.
c. Plate edge should start to get red.
1) If the plate edge does not start to melt
(making fluid puddle), preheat flame is
too cold.
2) If edge starts to melt too much (a fluid
puddle the same diameter as the tip end),
the preheat flame is too hot.
c) To adjust the too hot preheat
flame (so that just enough
heat is put into the plate to
have a square edge on top of
cut):
(1) Both the oxygen and gas
valves must be slowly closed
to reduce the preheat flame.
First, close the oxygen valve
slightly until the blue flame
gets longer. Then close the
gas valve until the blue flame
shortens to the correct original
length.
(2) Watch plate edge until fluid
puddle is approximately ½ the
size of the torch tip.
d. It is better to start with a cold preheat flame and
slowly increase the oxygen and gas flow until a
small molten fluid puddle appears on the starting
edge of the plate.
6. START CUTTING (See para. C for detailed
procedure for making a starting hole.)
Flame Cutting Handbook.p65 5/9/2007, 8:06 AM 20