Special provisions may be very complex. The extracts are taken from 49 CFR §172.102
. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.
Metal (31A, 31B and 31N);
Rigid plastics (31H1 and 31H2); Composite
Only liquids with a
vapor pressure less than or equal to 110 kPa
at 50 [deg]C (1.1 bar at 122 [deg]F), or 130
kPa at 55 [deg]C (1.3 bar at 131 [deg]F) are
Browse special provision IB2
IBCs must have a device to allow venting. The
inlet to the venting device must be located
in the vapor space of the IBC under maximum
Browse special provision IP5
The maximum degree of filling must not exceed the degree of filling determined by the following:
is the maximum mean bulk temperature during transport, and tf
is the temperature in degrees celsius of the liquid during filling.
Browse special provision TP1
The tank must be equipped with a pressure release device which prevent a tank from bursting under fire engulfment conditions (the conditions prescribed in CGA pamphlet S-1.2 (see §171.7 of this subchapter) or alternative conditions approved by the Associate Administrator may be used to consider the fire engulfment condition), taking into account the properties of the hazardous material to be transported.
Browse special provision TP6
The portable tank may be fitted with a device to prevent the build up of excess pressure due to the slow decomposition of the hazardous material being transported. The device must be in the vapor space when the tank is filled under maximum filling conditions. This device must also prevent an unacceptable amount of leakage of liquid in the case of overturning.
Browse special provision TP24
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||Total1|
|52% or less||11|
|Over 52%, but not greater than 60%||22|
|Over 60%, but not greater than 72%||32|
Total venting capacity in standard cubic feet hour (S.C.F.H.) per pound of hydrogen peroxide solution.
Browse special provision TP37