Where is the identification information found on a DOT Cylinder?

The identification information on a DOT cylinder is permanently stamped on the cylinder collar. This information typically includes critical details such as the cylinder's specifications, manufacturer, and testing dates, ensuring the cylinder's compliance with safety regulations. Stamping this information directly onto the collar helps ensure that it is durable and readily visible, allowing users to verify the cylinder's data without needing additional tools or documents.

Other locations mentioned, such as the pressure gauge, manufacturer’s label, or instructional manual, do not contain the required permanent identification information necessary for regulatory compliance. The pressure gauge provides functional information about the gas pressure inside the cylinder, while a manufacturer's label may provide additional details such as a model number or safety warnings, but it does not replace the required information stamped directly on the collar. The instructional manual serves as a guide for usage and safety procedures but isn't the location of permanent identification info for the cylinder itself.