subchapter c -- federal hazardous substances act regulations

°F. divisions, and conforming to thermometer
9F. of ASTM Standard E 1. For flashpoints
from 20 °F. to 40 °F., use ASTM Tag Closed
Tester, Low Range, Thermometer 57F. For
flashpoints below 20 °F., use ASTM
Thermometer 33F. The original Tag Open-Cup
(Paper Scale) Thermometer will be a
permissible alternate until January 1, 1962. It
is calibrated to -20 °F.
(d) Glass test cup. Glass test cup (Fig. 2),
of molded clear glass, annealed, heat-resistant,
and free from surface defects.
(e) Leveling device. Leveling device or
guide, for proper adjustment of the liquid level
in the cup (Fig. 3). This shall be made of No.
18-gage polished aluminum, with a projection
for adjusting the liquid level when the sample
is added to exactly 1 ⁄ 8 -inch below the level of
the edge or rim of the cup.
(f) “Micro,” or small gas burner of suitable
dimensions for heating the bath. A screw
clamp may be used to help regulate the gas. A
small electric heater may be used.
(g) Ignition taper, which is a small straight,
blow-pipe type gas burner. The test flame
torch prescribed in the method of test for flash
16 CFR Ch. II (1–1–05 Edition)—proposed modificication – 6/25/06
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and fire points by Cleveland Open Cup
(ASTM designation: D 92) is satisfactory.
(h) Alternative methods for maintaining
the ignition taper in a fixed horizontal plane
above the liquid may be used, as follows:
(1) Guide wire, 3 ⁄ 32 -inch in diameter and 3 1 ⁄ 2
inches in length, with a right-angle bend 1 ⁄ 2 -
inch from each end. This wire is placed snugly
in holes drilled in the rim of the bath, so that
the guide wire is 5 ⁄ 8 -inch from the center of the
cup and resting on the rim of the cup.
(2) Swivel-type taper holder, such as is
used in ASTM METHOD D 92. The height
and position of the taper are fixed by adjusting
the holder on a suitable ringstand support
adjacent to the flash cup.
(i) Draft shield, consisting of two
rectangular sheets of noncombustible material,
24 inches × 28 inches, are fastened together
along the 28-inch side, preferably by hinges.
A triangular sheet, 24 inches × 24 inches × 34
inches is fastened by hinges to one of the
lateral sheets (to form a top when shield is
open). The interior of the draft shield shall be
painted a flat black.
PROCEDURE
4. (a) Place the tester on a solid table free
of vibration, in a location free of perceptible
draft, and in a dim light.
(b) Run water, brine, or water-glycol
solution into the bath to a predetermined level,
which will fill the bath to 1 ⁄ 8 -inch below the
top when the cup is in place. An overflow is
permissible for water-level control.
(c) Firmly support the thermometer
vertically halfway between the center and edge
of the cup on a diameter at right angles to the
guide wire, or on a diameter passing through
the center of the cup and the pivot of the taper.
Place so that the bottom of the bulb is 1 ⁄ 4 -inch
from the inner bottom surface of the cup. If the
old Tagliabue thermometer is used, immerse to
well cover the mercury bulb, but not the wide
body of the thermometer.
(d) Fill the glass cup with the sample liquid
to a depth just 1 ⁄ 8 -inch below the edge, as
determined by the leveling device.
(e) Place the guide wire or swivel device in
position, and set the draft shield around the
tester so that the sides from right angles with
each other and the tester is well toward the
back of the shield.