BUG-O Systems Flame Cutting - Manual (Page 29)

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7. High preheat flame was used in this cut. The
top surface is melted and rolls over the edge
as small globs of metal. This cut must be
machined of ground to make it suitable for
welding.
8. A dirty or slag-clogged tip was used in this
cut. It caused the oxygen stream to lose its
parallel form. As a result, the surface of the
cut is no longer clear and regular. This surface
will require machining or grinding to make it
suitable for welding.
Flame Cutting Handbook.p65 5/9/2007, 8:06 AM 29