An acetylene cylinder is a high-pressure container used to store and transport acetylene gas, a colorless and flammable gas commonly used in welding and cutting applications. These cylinders are typically made of steel and are designed to withstand high pressures, ensuring safe storage. Acetylene is often used in combination with oxygen in a process known as oxy-acetylene welding, which produces a very hot flame ideal for melting metals. To ensure safety, acetylene cylinders are equipped with specific valves and pressure regulators. They are usually filled with a porous material soaked in a solvent, such as acetone, which helps stabilize the gas and prevent it from escaping too quickly. Proper handling and storage of acetylene cylinders are crucial to avoid accidents, as the gas can be explosive under certain conditions.