This is a high altitude helium balloon.

It's that shape because the helium has to expand.

4.2.3.6.3 Shells intended for the transport of helium can be filled up to but not above the inlet of the pressure relief device.

He turned the wrong valve when he filled his cylinder he had 80 percent oxygen in his tank when he should have had 40.

We need helium, and the helium is what we really need to go deep.

(i) The testing of aerosol dispensers

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.

And that's what we use to inject, as we start to do our deep dives.

She tripped over her oxygen tank.

Helium

Now helium's a gas, there're a lot of reasons why helium's good, it's a tiny molecule, it's inert, it doesn't give you narcosis.

And that's why helium's called helium.

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

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.

The initial degree of filling of the shell, except as provided for in 4.2.3.6.3 and 4.2.3.6.4, shall be such that if the contents, except helium, were to be raised to a temperature at which the vapour pressure is equal to the maximum allowable working pressure (MAWP) the volume occupied by liquid would not exceed 98 .

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

And unfortunately, the helium atoms in liquid helium are right on top of each other.

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

And it can actually crush an empty soda can.

So, if you want to go with the music for cylinders.

After injection, up to 4 tonnes of the oxidizer and its vapours, up to 2 tonnes of the fuel and up to 60 kg of gaseous helium can still remain in tanks.

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

The only trouble is that you've forgotten to check your air tanks.

Now the one thing that I forgot to mention, is that to obviate the problem of the nitrogen narcosis all of those blue dots in our body you remove the nitrogen and you replace it with helium.

(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

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

In the case of multi purpose tanks, the combined delivery capacity of the pressure relief devices shall be taken for the gas which requires the highest delivery capacity of the gases allowed to be transported in portable tanks.

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

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.

The minimum total IBC or tank vent area is given by

This portable tank instruction applies to non refrigerated liquefied gases.

TP20 This substance shall only be transported in insulated tanks under a nitrogen blanket.

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

And now simple atoms appear of hydrogen and helium.

(f) An increase in the number of baffles and surge plates

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

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

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.

6.6.3.7.4 In the case of multi purpose portable tanks, the pressure relief devices shall open at a pressure indicated in 6.6.3.7.1 for the gas having the highest maximum allowable pressure of the gases allowed to be transported in the portable tank.

Pots.

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

C. Space debris reduction practices NASDA has implemented the draining of residual propellants (LOX, LH2, N2H4) and residual helium gas of the H I H II second stage.

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

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.

So the main tank, the main critical thing, is this oxygen gas supply cylinder we have here.