365 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.102 

equipped with a non-reclosing pressure re-
lief device, the rupture disc must be per-
forated with a 3.2 mm (0.13 inch) diameter 
hole. If a tank car tank is equipped with a 
reclosing pressure relief valve, the tank 
must also be equipped with a vacuum relief 
valve. 

B80

Each cargo tank must have a minimum 

design pressure of 276 kPa (40 psig). 

B81

Venting and pressure relief devices for 

tank car tanks and cargo tanks must be 
approved by the Associate Administrator. 

B82

Cargo tanks and portable tanks are not 

authorized. 

B83

Bottom outlets are prohibited on tank 

car tanks transporting sulfuric acid in con-
centrations over 65.25 percent. 

B84

Packagings must be protected with 

non-metallic linings impervious to the lad-
ing or have a suitable corrosion allowance 
for sulfuric acid or spent sulfuric acid in 
concentration up to 65.25 percent. 

B85

Cargo tanks must be marked with the 

name of the lading in accordance with the 
requirements of § 172.302(b). 

B90

Steel tanks conforming or equivalent 

to ASME specifications which contain 
solid or semisolid residual motor fuel anti-
knock mixture (including rust, scale, or 
other contaminants) may be shipped by 
rail freight or highway. The tank must 
have been designed and constructed to be 
capable of withstanding full vacuum. All 
openings must be closed with gasketed 
blank flanges or vapor tight threaded clo-
sures. 

B115

Rail cars, highway trailers, roll-on/ 

roll-off bins, or other non-specification 
bulk packagings are authorized. Pack-
agings must be sift-proof, prevent liquid 
water from reaching the hazardous mate-
rial, and be provided with sufficient vent-
ing to preclude dangerous accumulation of 
flammable, corrosive, or toxic gaseous 
emissions such as methane, hydrogen, and 
ammonia. The material must be loaded 
dry. 

B116

The use of non specification, sift-proof 

dump or hopper type vehicles, and sift- 
proof roll-on/roll-off bulk bins, which must 
be covered by a tarpaulin, metal cover, or 
equivalent means is authorized for the 
transportation of spent bleaching earth by 
motor vehicle. The material is also be sub-
ject to operational controls which include 
not exceeding a temperature of 55C (130F) 
at the time it is offered or during transpor-
tation, not exceeding a transportation 
time of 24 hours, and drivers transporting 
spent bleaching earth must be trained in 
the properties and hazards of the spent 
bleaching earth. This training must be doc-
umented in training records required by 
§ 172.704(d). 

B120

The use of flexible bulk containers 

conforming to the requirements in subpart 

R and subpart S of part 178 of this sub-
chapter is permitted. 

B130

When transported by motor vehicle, 

used diatomaceous earth filter material is 
not subject to any other requirements of 
this subchapter except for the shipping 
paper requirements of subpart C of part 172 
of this subchapter; emergency response in-
formation as required by § 172.602(a)(2) 
through (a)(7) of this subchapter; and the 
marking requirements of § 172.302 of this 
subchapter, if the following requirements 
are met: 
a. Packagings are non-DOT specification 

sift-proof motor vehicles or sift-proof 
roll-on/roll-off bulk bins, which are cov-
ered by a tarpaulin or other equivalent 
means. 

b. The temperature of the material at the 

time it is offered for transport and dur-
ing transportation may not exceed 55 

°

C 

(130 

°

F). 

c. The time between offering the material 

for transportation at the point of origin, 
and unloading the material at the des-
tination does not exceed 48 hours. 

d. In addition to the training requirements 

prescribed in §§ 172.700 through 172.704, 
each driver must be trained regarding 
the properties and hazards of diatoma-
ceous earth filter material, precautions 
to ensure safe transport of the material, 
and actions to be taken in the event of 
an emergency during transportation, or a 
substantial delay in transit. 

B131

When transported by highway, rail, or 

cargo vessel, waste Paint and Paint related 
material (UN1263; PG II and PG III), when 
in plastic or metal inner packagings of not 
more than 26.5 L (7 gallons), are excepted 
from the marking requirements in 
§ 172.301(a) and (c) and the labeling require-
ments in § 172.400(a), when further packed 
in the following specification and non- 
specification bulk outer packagings and 
under the following conditions: 
a. Primary receptacles must conform to 

the general packaging requirements of 
subpart B of part 173 of this subchapter 
and may not leak. If they do leak, they 
must be overpacked in packagings con-
forming to the specification require-
ments of part 178 of this subchapter or in 
salvage packagings conforming to the re-
quirements in § 173.12 of this subchapter. 

b. Primary receptacles must be further 

packed in non-specification bulk outer 
packagings such as cubic yard boxes, 
plastic rigid-wall bulk containers, dump 
trailers, and roll-off containers. Bulk 
outer packagings must be liquid tight 
through design or by the use of lining 
materials. 

c. Primary receptacles may also be further 

packed in specification bulk outer pack-
agings. Authorized specification bulk 
outer packagings are UN11G fiberboard 

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