… Containers for compressed or liquefied gas, of iron or steel. …
Explanatory notes
… 73.11 ‑ Containers for compressed or liquefied gas, of iron or steel. This heading … for the transport or storage of compressed or liquefied gases (e.g., helium, oxygen, argon, hydrogen, acetylene, … carbon dioxide or butane). Some are strong cylinders, tubes, bottles, etc., tested at high pressure; these may be …