Fluid storage devices
- 23/23.020/23.020.01 Fluid storage devices in general
- 23/23.020/23.020.10 Stationary containers and tanks
- 23/23.020/23.020.20 Vessels and containers mounted on vehicles
- 23/23.020/23.020.30 Gas pressure vessels, gas cylinders
- 23/23.020/23.020.35 Gas cylinders
- 23/23.020/23.020.40 Cryogenic vessels
- 23/23.020/23.020.99 Other fluid storage devices