14 CFR Ch. I (1-1-19 Edition)

(4) Pilot Burner. The pilot burner used to
ignite
the
specimen
must
be
a
Bernzomatic TM commercial propane venturi
torch with an axially symmetric burner tip
and a propane supply tube with an orifice diameter of 0.006 inches (0.15 mm). The length
of the burner tube must be 27-8 inches (71
mm). The propane flow must be adjusted via
gas pressure through an in-line regulator to
produce a blue inner cone length of 3-4 inch

(19 mm). A 3-4 inch (19 mm) guide (such as a
thin strip of metal) may be soldered to the
top of the burner to aid in setting the flame
height. The overall flame length must be approximately 5 inches long (127 mm). Provide
a way to move the burner out of the ignition
position so that the flame is horizontal and
at least 2 inches (50 mm) above the specimen
plane. See figure 6.

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spaschal on DSK3GDR082PROD with CFR

Pt. 25, App. F