What is a potential safety concern with storing acetylene cylinders horizontally?

Storing acetylene cylinders horizontally presents significant safety concerns primarily because of the risks associated with the liquid acetone, which is used as a solvent to stabilize the acetylene gas. In a vertical position, the acetylene gas is contained in the upper part of the cylinder, while the liquid acetone remains at the bottom. If these cylinders are stored horizontally, the liquid acetone can escape, leading to the potential for hazardous conditions.

When acetylene is released in a liquid form, it can create a fire hazard and a risk of explosion, especially in confined areas or when combined with air. Additionally, the presence of acetylene instead of acetone in the gas phase upon release can increase the likelihood of producing a flammable mixture.

This understanding of the physical properties and behavior of acetylene and acetone in different positions underscores the critical safety protocols in properly storing and handling gases to prevent accidents and maintain safe working environments.