What is the main purpose of storing acetylene cylinders upright?

Storing acetylene cylinders upright is crucial primarily to prevent acetone from escaping. Acetylene is a gas used in various applications, such as welding and cutting, and it is typically dissolved in acetone within the cylinder to stabilize it and make it safe for transport. When cylinders are stored upright, the acetylene remains absorbed in the acetone, preventing it from escaping and ensuring that the gas remains in a usable and safe form.

If acetylene were to escape from the cylinder, it could create hazardous conditions, as acetylene is highly flammable and poses safety risks. By keeping the cylinder upright, the internal pressure and conditions help maintain the integrity of the acetylene within the acetone solution, thereby promoting safe handling and use.

Other answers may suggest benefits like space optimization or easier gauge readings, but these are secondary considerations and do not address the critical safety measure related to acetylene's behavior in storage. It's also important to recognize that the risk of mixing with other gases or the inability to optimally read gauges is not a primary safety concern compared to the necessity of keeping acetylene in a stable state.