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.

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

(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

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

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.

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.

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

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.

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.

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

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

4.2.2.7.2 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.

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.

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.

This device shall also prevent an unacceptable amount of leakage of liquid in the case of overturning or entry of foreign matter into the tank.

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

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

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.

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.

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.

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.

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.

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.

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.

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

(a) in an ullage condition liable to produce an unacceptable hydraulic force due to surge within the portable tank

(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

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

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.

4.2.1.10.1 All portable tanks intended for the transport of flammable liquids shall be closed and be fitted with relief devices in accordance with 6.6.2.8 to 6.6.2.15.

The names, in full, of the gases for whose transport the portable tank is approved

The start to discharge pressure shall, however, in no case be such that liquid would escape from the valve(s) if the portable tank were overturned.

The portable tank includes a shell fitted with service equipment and structural equipment necessary for the transport of gases.

Road tank vehicles, rail tank wagons, non metallic tanks, intermediate bulk containers (IBCs), gas cylinders and large receptacles are not considered to fall within the definition for portable tanks

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

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.

Tanks shall be hydraulically tested and internally inspected at intervals not exceeding 2.5 years.