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49 CFR Ch. I (10–1–18 Edition)

§ 172.102

A191

Notwithstanding the Division 6.1 sub-

sidiary risk for this description, the toxic
subsidiary risk label and the requirement
to indicate the subsidiary risk on the ship-
ping paper are not required for manufac-
tured articles containing less than 5 kg (11
pounds) of mercury.

A200

These articles must be transported as

cargo and may not be carried aboard an
aircraft by passengers or crewmembers in
carry-on baggage, checked baggage, or on
their person unless specifically authorized
in § 175.10.

A210

This substance is forbidden for trans-

port by air. It may be transported on cargo
aircraft only with the prior approval of the
Associate Administrator.

A212

‘‘UN 2031, Nitric acid

, other than red

fuming, with more than 20% and less than
65% nitric acid’’

intended for use in steri-

lization devices only, may be transported
on passenger aircraft irrespective of the in-
dication of ‘‘forbidden’’ in columns (9A) of
the § 172.101 table provided that:
a. Each inner packaging contains not more

than 30 mL;

b. Each inner packaging is contained in a

sealed leak-proof intermediate packaging
with sufficient absorbent material capa-
ble of containing the contents of the
inner packaging;

c. Intermediate packagings are securely

packed in an outer packaging of a type
permitted by § 173.158(g) of this sub-
chapter which meet the requirements of
part 178 of this subchapter at the Pack-
ing Group I performance level;

d. The maximum quantity of nitric acid in

the package does not exceed 300 mL; and

e. Transport in accordance with this spe-

cial provision must be noted on the ship-
ping paper.

(3)

‘‘B’’ codes.

These provisions apply

only to bulk packagings. Except as
otherwise provided in this subchapter,
these special provisions do not apply to
UN portable tanks or IBCs:

Code/Special Provisions

If the material has a flash point at or

above 38

C (100

F) and below 93

C (200

F),

then the bulk packaging requirements of
§ 173.241 of this subchapter are applicable.
If the material has a flash point of less
than 38

C (100

F), then the bulk packaging

requirements of § 173.242 of this subchapter
are applicable.

MC 300, MC 301, MC 302, MC 303, MC 305,

and MC 306 and DOT 406 cargo tanks are
not authorized.

MC 300, MC 301, MC 302, MC 303, MC 305,

and MC 306 and DOT 406 cargo tanks and
DOT 57 portable tanks are not authorized.

MC 300, MC 301, MC 302, MC 303, MC 305,

and MC 306 and DOT 406 cargo tanks are
not authorized.

Only ammonium nitrate solutions with

35 percent or less water that will remain
completely in solution under all conditions
of transport at a maximum lading tem-
perature of 116

C (240

F) are authorized

for transport in the following bulk pack-
agings: MC 307, MC 312, DOT 407 and DOT
412 cargo tanks with at least 172 kPa (25
psig) design pressure. The packaging shall
be designed for a working temperature of
at least 121

C (250

F). Only Specifications

MC 304, MC 307 or DOT 407 cargo tank
motor vehicles are authorized for transpor-
tation by vessel.

Packagings shall be made of steel.

Safety relief devices are not authorized

on multi-unit tank car tanks. Openings for
safety relief devices on multi-unit tank car
tanks shall be plugged or blank flanged.

Packagings shall be made of nickel,

stainless steel, or steel with nickel, stain-
less steel, lead or other suitable corrosion
resistant metallic lining.

Bottom outlets are not authorized.

B10

MC 300, MC 301, MC 302, MC 303, MC 305,

and MC 306 and DOT 406 cargo tanks, and
DOT 57 portable tanks are not authorized.

B11

Tank car tanks must have a test pres-

sure of at least 2,068.5 kPa (300 psig). Cargo
and portable tanks must have a design
pressure of at least 1,207 kPa (175 psig).

B13

A nonspecification cargo tank motor

vehicle authorized in § 173.247 of this sub-
chapter must be at least equivalent in de-
sign and in construction to a DOT 406
cargo tank or MC 306 cargo tank (if con-
structed before August 31, 1995), except as
follows:
a. Packagings equivalent to MC 306 cargo

tanks are excepted from the certifi-
cation, venting, and emergency flow re-
quirements of the MC 306 specification.

b. Packagings equivalent to DOT 406 cargo

tanks are excepted from §§ 178.345–7(d)(5),
circumferential reinforcements; 178.345–
10, pressure relief; 178.345–11, outlets;
178.345–14, marking, and 178.345–15, cer-
tification.

c. Packagings are excepted from the design

stress limits at elevated temperatures, as
described in Section VIII of the ASME
Code (IBR, see § 171.7 of this subchapter).
However, the design stress limits may
not exceed 25 percent of the stress for 0
temper at the maximum design tempera-
ture of the cargo tank, as specified in the
Aluminum Association’s ‘‘Aluminum
Standards and Data’’ (IBR, see § 171.7 of
this subchapter).

B14

Each bulk packaging, except a tank car

or a multi-unit-tank car tank, must be in-
sulated with an insulating material so that
the overall thermal conductance at 15.5

(60

F) is no more than 1.5333 kilojoules per

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