358
49 CFR Ch. I (10–1–18 Edition)
§ 172.102
greater than 0.3 Wh. Capacitors with an en-
ergy storage capacity of 0.3 Wh or less are
not subject to the requirements of this
subchapter.
Energy storage capacity means the energy
stored in a capacitor, as calculated ac-
cording to the following equation,
Wh = 1/2C
N
(U
R
2
¥
U
L
2
)
×
(1/3600)
Using the nominal capacitance (C
N
), rated
voltage (U
R
) and the rated lower limit
voltage (U
L
).
Nickel-carbon asymmetric capacitors con-
taining Class 8 alkaline electrolytes
must be transported as UN2795, Bat-
teries, wet, filled with alkali, electric
storage.
379
When offered for transport by highway,
rail, or cargo vessel, anhydrous ammonia
adsorbed or absorbed on a solid contained
in ammonia dispensing systems or recep-
tacles intended to form part of such sys-
tems is not subject to the requirements of
this subchapter if the following conditions
in this provision are met. In addition to
meeting the conditions in this provision,
transport on cargo aircraft only may be
authorized with prior approval of the Asso-
ciate Administrator.
a. The adsorption or absorption presents
the following properties:
(1) The pressure at a temperature of 20
°
C
(68
°
F) in the receptacle is less than 0.6
bar (60 kPa);
(2) The pressure at a temperature of 35
°
C
(95
°
F) in the receptacle is less than 1 bar
(100 kPa);
(3) The pressure at a temperature of 85
°
C
(185
°
F) in the receptacle is less than 12
bar (1200 kPa).
b. The adsorbent or absorbent material
shall not meet the definition or criteria
for inclusion in Classes 1 to 8;
c. The maximum contents of a receptacle
shall be 10 kg of ammonia; and
d. Receptacles containing adsorbed or ab-
sorbed ammonia shall meet the following
conditions:
(1) Receptacles shall be made of a material
compatible with ammonia as specified in
ISO 11114–1:2012 (IBR, see § 171.7 of this
subchapter);
(2) Receptacles and their means of closure
shall be hermetically sealed and able to
contain the generated ammonia;
(3) Each receptacle shall be able to with-
stand the pressure generated at 85
°
C (185
°
F) with a volumetric expansion no
greater than 0.1%;
(4) Each receptacle shall be fitted with a
device that allows for gas evacuation
once pressure exceeds 15 bar (1500 kPa)
without violent rupture, explosion or
projection; and
(5) Each receptacle shall be able to with-
stand a pressure of 20 bar (2000 kPa) with-
out leakage when the pressure relief de-
vice is deactivated.
e. When offered for transport in an ammo-
nia dispenser, the receptacles shall be
connected to the dispenser in such a way
that the assembly is guaranteed to have
the same strength as a single receptacle.
f. The properties of mechanical strength
mentioned in this special provision shall
be tested using a prototype of a recep-
tacle and/or dispenser filled to nominal
capacity, by increasing the temperature
until the specified pressures are reached.
g. The test results shall be documented,
shall be traceable, and shall be made
available to a representative of the De-
partment upon request.
380
For transportation by private carrier in
a motor carrier only, this material is not
subject to the segregation requirements of
§ 177.848(d) of this subchapter under the fol-
lowing conditions:
a. The material is packaged in a DOT Spec-
ification 4BW240 cylinder, or in a DOT–51
portable tank.
b. The material may only be loaded with
Class 3, Class 8, and Division 4.1 mate-
rials in Packing Group II or III.
c. The motor carrier must maintain a sat-
isfactory safety rating as prescribed in 49
CFR part 385.
381
For railroad flagging kits, see § 173.184
(c) of this subchapter.
382
Packages containing toy plastic or
paper caps for toy pistols described as
‘‘UN0349, Articles, explosive, n.o.s. (Toy
caps), 1.4S’’ or ‘‘NA0337, Toy caps, 1.4S’’ are
not subject to the subpart E (labeling) re-
quirements of this part when offered for
transportation by motor vehicle, rail
freight, cargo vessel, and cargo aircraft
and, notwithstanding the packing method
assigned in § 173.62 of this subchapter, in
conformance with the following condi-
tions:
a. The toy plastic or paper caps must be in
the form of sheets, strips, rolls, or indi-
vidual caps;
b. The caps must not contain more than an
average of twenty-five hundredths of a
grain of explosive composition per cap;
c. The caps must be packed inside pack-
agings constructed of cardboard not less
than 0.013-inch in thickness, metal not
less than 0.008-inch in thickness, non-
combustible plastic not less than 0.015-
inch in thickness, or a composite blister
package consisting of cardboard not less
than 0.013-inch in thickness and non-
combustible plastic not less than 0.005-
inch in thickness that completely en-
closes the caps;
d. The minimum dimensions of each side
and each end of the cardboard packaging
must be 1/8th inch in height or more;
e. The number of caps inside each pack-
aging must be limited so that not more
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