Pipeline and Haz. Matls. Safety Admin., DOT
Series 8 (see UN Manual of Tests and Criteria, Part 1, Sub-section 18.7) (IBR, see
Section 171.7 of this subchapter) or an alternative
means approved by the Associate Administrator.
TP33 The portable tank instruction assigned for this substance applies for granular
and powdered solids and for solids which are
filled and discharged at temperatures above
their melting point which are cooled and
transported as a solid mass. Solid substances
transported or offered for transport above
their melting point are authorized for transportation in portable tanks conforming to
the provisions of portable tank instruction
T4 for solid substances of packing group III
or T7 for solid substances of packing group
II, unless a tank with more stringent requirements for minimum shell thickness,
maximum allowable working pressure, pressure-relief devices or bottom outlets are assigned in which case the more stringent tank
instruction and special provisions shall
apply. Filling limits must be in accordance
with portable tank special provision TP3.
Solids meeting the definition of an elevated
temperature material must be transported in
accordance with the applicable requirements
of this subchapter.
TP36 For material assigned this portable
tank special provision, portable tanks used
to transport such material may be equipped
with fusible elements in the vapor space of
the portable tank.
TP37 IM portable tanks are only authorized for the shipment of hydrogen peroxide
solutions in water containing 72% or less hydrogen peroxide by weight. Pressure relief
devices shall be designed to prevent the
entry of foreign matter, the leakage of liquid
and the development of any dangerous excess
pressure. In addition, the portable tank must
be designed so that internal surfaces may be
effectively cleaned and passivated. Each
tank must be equipped with pressure relief
devices conforming to the following requirements:
Concentration of hydrogen per peroxide solution
52% or less ..............................................................
Over 52%, but not greater than 60% ......................
Over 60%, but not greater than 72% ......................

Total 1
11
22
32

1 Total venting capacity in standard cubic feet hour
(S.C.F.H.) per pound of hydrogen peroxide solution.

TP38 Each portable tank must be insulated with an insulating material so that the
overall thermal conductance at 15.5 SectionC (60 SectionF)
is no more than 1.5333 kilojoules per hour per
square meter per degree Celsius (0.075 Btu
per hour per square foot per degree Fahrenheit) temperature differential. Insulating
materials may not promote corrosion to
steel when wet.
TP39 The portable tank instruction T4
prescribed may continue to be applied until
December 31, 2018.

Section 172.102

TP40 The portable tank must not be
transported when connected with spray application equipment.
TP41 The portable tank instruction T9
may continue to be applied until December
31, 2018.
TP44 Each portable tank must be made of
stainless steel, except that steel other than
stainless steel may be used in accordance
with the provisions of Section 173.24b(b) of this subchapter. Thickness of stainless steel for tank
shell and heads must be the greater of 7.62
mm (0.300 inch) or the thickness required for
a portable tank with a design pressure at
least equal to 1.5 times the vapor pressure of
the hazardous material at 46 SectionC (115 SectionF).
TP45 Each portable tank must be made of
stainless steel, except that steel other than
stainless steel may be used in accordance
with the provisions of 173.24b(b) of this subchapter. Thickness of stainless steel for portable tank shells and heads must be the greater of 6.35 mm (0.250 inch) or the thickness required for a portable tank with a design pressure at least equal to 1.3 times the vapor
pressure of the hazardous material at 46 SectionC
(115 SectionF).
TP46 Portable tanks in sodium metal
service
are
not
required
to
be
hydrostatically retested.
TP47 The 2.5 year internal examination
may be waived or substituted by other test
methods or inspection procedures specified
by the competent authority or its authorized
body, provided that the portable tank is
dedicated
to
the
transport
of
the
organometallic substances to which this
tank special provision is assigned. However
this examination is required when the conditions of Section 180.605(f) are met.

(9)  - W -  codes. These provisions apply
only to transportation by water:
Code/Special Provisions
W1 This substance in a non friable prill or
granule form is not subject to the requirements of this subchapter when tested in
accordance with the UN Manual of Test
and Criteria (IBR, see Section 171.7 of this subchapter) and is found to not meet the definition or criteria for inclusion in Division
5.1.
W7 Vessel stowage category for uranyl nitrate hexahydrate solution is  - D -  as defined in Section 172.101(k)(4).
W8 Vessel stowage category for pyrophoric
thorium metal or pyrophoric uranium
metal is  - D -  as defined in Section 172.101(k)(4).
W9 When offered for transportation by
water, the following Specification packagings are not authorized unless approved
by the Associate Administrator: woven
plastic bags, plastic film bags, textile bags,
paper bags, IBCs and bulk packagings.

373

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