For refrigerated liquefied gases, the escaping vapour shall be directed away from the tank and in such a manner that it cannot impinge upon the tank.

4.2.4.2.4 Refrigerated liquefied gases are assigned to portable tank instruction T75.

For flammable non refrigerated liquefied gases, the escaping vapour shall be directed away from the shell in such a manner that it cannot impinge upon the shell.

and degree of filling requirements for non refrigerated liquefied gases permitted for transport in portable tanks.

This portable tank instruction applies to non refrigerated liquefied gases.

4.2.3 General requirements for the use of portable tanks for the transport of refrigerated liquefied gases

4.2.2 General requirements for the use of portable tanks for the transport of non refrigerated liquefied gases

6.6.4.2.15 Portable tanks intended for the transport of flammable refrigerated liquefied gases shall be capable of being electrically earthed.

6.6.4.2.2 Any part of a portable tank, including fittings, gaskets and pipe work, which can be expected normally to come into contact with the refrigerated liquefied gas transported shall be compatible with that refrigerated liquefied gas.

Non refrigerated liquefied gases shall be transported in portable tanks conforming to portable tank instruction T50 as described in 4.2.4.2.6 and any portable tank special provisions assigned to specific refrigerated liquefied gases in Column 11 of the Dangerous Goods List and described in 4.2.4.3.

Portable tank means a multimodal tank having a capacity of more than 450 litres used for the transport of non refrigerated liquefied gases of Class 2.

4.2.2.7.2 The maximum mass of non refrigerated liquefied gas per litre of shell capacity (kg l) shall not exceed the density of the non refrigerated liquefied gas at 50 C multiplied by 0.95.

6.6.3.2.13 Portable tanks intended for the transport of flammable non refrigerated liquefied gases shall be capable of being electrically earthed.

(i) for a non refrigerated liquefied gas listed in the portable tank instruction T50 in 4.2.4.2.6, the MAWP (in bar) given in T50 portable tank instruction for that gas

4.2.3.1 This section provides general requirements applicable to the use of portable tanks for the transport of refrigerated liquefied gases.

6.6.4 Requirements for the design, construction, inspection and testing of portable tanks intended for the transport of refrigerated liquefied gases

4.2.2.1 This section provides general requirements applicable to the use of portable tanks for the transport of non refrigerated liquefied gases.

6.6.3 Requirements for the design, construction, inspection and testing of portable tanks intended for the transport of non refrigerated liquefied gases

6.6.4.2.8 A reference holding time shall be determined for each refrigerated liquefied gas intended for transport in a portable tank.

Portable tank means a thermally insulated multimodal tank having a capacity of more than 450 litres fitted with service equipment and structural equipment necessary for the transport of refrigerated liquefied gases.

Filling density means the average mass of non refrigerated liquefied gas per litre of shell capacity (kg l).

LPG Liquefied Petroleum Gas

Shell means the part of the portable tank which retains the non refrigerated liquefied gas intended for transport (tank proper), including openings and their closures, but does not include service equipment or structural equipment

The shell design shall take into account the minimum MAWP values provided in portable tank instruction T50 in 4.2.4.2.6 for each non refrigerated liquefied gas intended for transport.

4.2.3.6.1 Prior to filling the shipper shall ensure that the portable tank is approved for the refrigerated liquefied gas to be transported and that the portable tank is not loaded with refrigerated liquefied gases which in contact with the materials of the shell, gaskets and service equipment, are likely to react dangerously with them to form dangerous products or appreciably weaken the material.

Petroleum gas, liquefied

Design temperature range for the shell shall be 40 C to 50 C for non refrigerated liquefied gases transported under ambient conditions.

6.6.3.2.12 When the shells intended for the transport of non refrigerated liquefied gases are equipped with thermal insulation, the thermal insulation systems shall satisfy the following requirements

4.2.2.6 Empty portable tanks not cleaned and not gas free shall comply with the same requirements as portable tanks filled with the previous non refrigerated liquefied gas.

6.6.3.7.3 Portable tanks intended for the transport of certain non refrigerated liquefied gases identified in portable tank instruction T50 in 4.2.4.2.6 shall have a pressure relief device approved by the competent authority.

Shell means the part of the portable tank which retains the refrigerated liquefied gas intended for transport, including openings and their closures, but does not include service equipment or external structural equipment

(e) unless the actual holding time for the refrigerated liquefied gas being transported has been determined in accordance with 4.2.3.7 and the portable tank is marked in accordance with 6.6.4.15.2 and

This portable tank instruction applies to refrigerated liquefied gases. The general requirements of Section 4.2.3 and the requirements of Section 6.6.4 shall be met. 4.2.4.3 Portable tank special provisions

4.2.2.7.1 Prior to filling the shipper shall ensure that the portable tank is approved for the non refrigerated liquefied gas to be transported and that the portable tank is not loaded with non refrigerated liquefied gases which in contact with the materials of the shell, gaskets and service equipment, are likely to react dangerously with them to form dangerous products or appreciably weaken the material.

6.6.3.2.5 The materials of the portable tank, including any devices, gaskets, and accessories, shall not adversely affect the non refrigerated liquefied gases intended for transport in the portable tank.

The certificate shall refer to the prototype test report, the refrigerated liquefied gases allowed to be transported, the materials of construction of the tank and jacket and an approval number.

6.6.3.6.1 Certain non refrigerated liquefied gases shall not be transported in portable tanks with bottom openings when portable tank instruction T50 in 4.2.4.2.6 indicates that bottom openings are not allowed.

6.6.4.6.2 Shells for non flammable refrigerated liquefied gases and hydrogen may in addition have frangible discs in parallel with the spring loaded devices as specified in 6.6.4.7.2 and 6.6.4.7.3.

Refrigerated liquefied gases shall be transported in portable tanks conforming to portable tank instruction T75 as described in 4.2.4.2.6 and the portable tank special provisions assigned to each substance in the Dangerous Goods List and described in 4.2.4.3.

Your blood tries to boil. It's called vaporization.

(e) the physical properties of the individual refrigerated liquefied gas intended to be transported.

6.6.4.2.6 Portable tanks intended for the transport of refrigerated liquefied gases having a boiling point below minus 182 C at atmospheric pressure shall not include materials which may react with oxygen or oxygen enriched atmospheres in a dangerous manner, when located in parts of the thermal insulation when there is a risk of contact with oxygen or with oxygen enriched fluid.

Hydrocarbon gas, mixture liquefied, n.o.s. Isobutane

The temperature inside the tank is measured by means of three thermocouples, two located in the liquid phase (near the top and bottom) and one in the gas phase.

Furthermore, the shell shall not be liquid full at 60 C.