BUG-O Systems Flame Cutting - Manual (Page 24)

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(3) Gouges or pockets have formed at the bottom
½ or 1/3 of cut shown in Sketch #3. This was
caused by using too high a pressure on the
cutting oxygen or too slow travel. Pressure
should be reduced or travel speed increased.
Excess oxygen will expand and gouge the hot
area of burn towards the bottom of the cut.
D. PROCEDURES FOR MAKING A STARTING
HOLE WITH A MACHINE BURNING TORCH
a. A 2- or 3- hose torch can be used with a 3/8''
(10mm) dia. oxygen hose, for volume, with a
regulator setting of 80 to 85 PSI (KG/M²).
b. The pre heat flame should be set a little hotter
than for the normal cut to get the surface
heated and melting faster.
Flame Cutting Handbook.p65 5/9/2007, 8:06 AM 24