415
Pipeline and Haz. Matls. Safety Admin., DOT
§ 172.334
[Amdt. 172–101, 45 FR 74667, Nov. 10, 1980, as
amended by Amdt. 172–81, 48 FR 28099, June
20, 1983; Amdt. 172–110, 52 FR 29527, Aug. 10,
1987; Amdt. 172–123, 55 FR 52593, Dec. 21, 1990;
56 FR 66255, Dec. 20, 1991; Amdt. 172–151, 62
FR 1228, Jan. 8, 1997; 65 FR 50459, Aug. 18,
2000; 68 FR 57632, Oct. 6, 2003; 87 FR 79772,
Dec. 27, 2022]
§ 172.334
Identification numbers; pro-
hibited display.
(a) No person may display an identi-
fication number on a RADIOACTIVE,
EXPLOSIVES 1.1, 1.2, 1.3, 1.4, 1.5 or 1.6,
DANGEROUS, or subsidiary hazard
placard.
(b) No person may display an identi-
fication number on a placard, orange
panel or white square-on-point display
configuration unless—
(1) The identification number is spec-
ified for the material in § 172.101;
(2) The identification number is dis-
played on the placard, orange panel or
white square-on-point configuration
authorized by § 172.332 or § 172.336(b), as
appropriate, and any placard used for
display of the identification number
corresponds to the hazard class of the
material specified in § 172.504;
(3) Except as provided under § 172.336
(c)(4) or (c)(5), the package, freight con-
tainer, or transport vehicle on which
the number is displayed contains the
hazardous material associated with
that identification number in § 172.101.
(c) Except as required by
§ 172.332(c)(4) for a combustible liquid,
the identification number of a material
may be displayed only on the placards
required by the tables in § 172.504.
(d) Except as provided in § 172.336, a
placard bearing an identification num-
ber may not be used to meet the re-
quirements of subpart F of this part
unless it is the correct identification
number for all hazardous materials of
the same class in the transport vehicle
or freight container on which it is dis-
played.
(e) Except as specified in § 172.338, an
identification number may not be dis-
played on an orange panel on a cargo
tank unless affixed to the cargo tank
by the person offering the hazardous
material for transportation in the
cargo tank.
(f) If a placard is required by § 172.504,
an identification number may not be
416
49 CFR Ch. I (10–1–23 Edition)
§ 172.336
displayed on an orange panel unless it
is displayed in proximity to the
placard.
(g) No person shall add any color,
number, letter, symbol, or word other
than as specified in this subchapter, to
any identification number marking
display which is required or authorized
by this subchapter.
[Amdt. 172–101, 45 FR 74667, Nov. 10, 1980, as
amended by Amdt. 172–104, 51 FR 23078, June
25, 1986; Amdt. 172–110, 52 FR 29528, Aug. 10,
1987; Amdt. 172–123, 55 FR 52593, Dec. 21, 1990;
56 FR 66255, Dec. 20, 1991; Amdt. 172–127, 59
FR 49133, Sept. 26, 1994]
§ 172.336
Identification numbers; spe-
cial provisions.
(a) When not required or prohibited
by this subpart, identification numbers
may be displayed on a transport vehi-
cle or a freight container in the man-
ner prescribed by this subpart.
(b) Identification numbers, when re-
quired, must be displayed on either or-
ange panels (see § 172.332(b)) or on a
plain white square-on-point display
configuration having the same outside
dimensions as a placard. In addition,
for materials in hazard classes for
which placards are specified and identi-
fication number displays are required,
but for which identification numbers
may not be displayed on the placards
authorized for the material (see
§ 172.334(a)), identification numbers
must be displayed on orange panels or
on the plain white square-on-point dis-
play configuration in association with
the required placards. An identifica-
tion number displayed on a white
square-on-point display configuration
is not considered to be a placard.
(1) The 100 mm (3.9 inch) by 215 mm
(8.5 inches) area containing the identi-
fication number shall be located as pre-
scribed by § 172.332 (c)(1) and (c)(2) and
may be outlined with a solid or dotted
line border.
(2) [Reserved]
(c) Identification Numbers are not re-
quired:
Packaging:
When:
Then the alter-
native marking re-
quirement is:
On the ends of
portable tanks,
cargo tanks, or
tank cars.
They have more
than one com-
partment and
hazardous mate-
rials with dif-
ferent identifica-
tion numbers
are being trans-
ported therein.
The identification
numbers on the
sides of the tank
are displayed in
the same se-
quence as the
compartments
containing the
materials they
identify.
On cargo tanks .....
They contain only
gasoline.
The tank is
marked ‘‘Gaso-
line’’ on each
side and rear in
letters no less
than 50 mm (2
inches) high, or
is placarded in
accordance with
§ 172.542(c).
On cargo tanks .....
They contain only
fuel oil.
The cargo tank is
marked ‘‘Fuel
Oil’’ on each
side and rear in
letters no less
than 50 mm (2
inches) high, or
is placarded in
accordance with
§ 172.544(c).
On one end of
nurse tanks if
that end con-
tains valves, fit-
tings, regulators
or gauges when
those appur-
tenances pre-
vent the mark-
ings and placard
from being prop-
erly placed and
visible.
They meet the
provisions of
§ 173.315(m) of
this subchapter.
N/A.
On cargo tanks, in-
cluding compart-
mented cargo
tanks, or tank
cars.
They contain more
than one petro-
leum distillate
fuel.
The identification
number for the
liquid petroleum
distillate fuel
having the low-
est flash point is
displayed. If the
cargo tank also
contains gaso-
line and alcohol
fuel blends con-
sisting of more
than 10% eth-
anol the identi-
fication number
‘‘3475’’ or
‘‘1987,’’ as ap-
propriate, must
also be dis-
played.
(d) When a bulk packaging is labeled
instead of placarded in accordance with
§ 172.514(c) of this subchapter, identi-
fication number markings may be dis-
played on the package in accordance