The marking "4B240" on a cylinder indicates that it is made of what material?

The marking "4B240" on a cylinder indicates that it is made of steel. This code complies with the specifications outlined by the Department of Transportation (DOT) for cylinder manufacturing material. Specifically, the "4B" signifies that the cylinder is a type of steel cylinder designed for non-refillable configuration, while "240" represents the service pressure rating of the cylinder, which is 240 psi.

Understanding these markings is crucial for safe handling and transportation of LP gas cylinders, as they inform users about the material properties and limitations of the cylinder. Knowledge of these specifications ensures that individuals can correctly identify the appropriate usage and safety measures necessary for handling cylinders made from different materials.