Is LP-gas capacity required to be marked on a DOT cylinder?

In the context of the NFPA 58 and DOT regulations regarding liquefied petroleum gas (LP-gas) cylinders, it is essential to note that LP-gas capacity is not required to be marked on Department of Transportation (DOT) cylinders. Instead, DOT cylinders must be marked with specific information such as the manufacturer's name, model number, serial number, and the year of manufacture.

The rationale behind this requirement focuses on safety and regulatory compliance. When transporting or using these cylinders, it is critical for them to have clear identification and compliance with safety standards rather than explicitly listing the capacity. The capacity of the cylinder is typically referenced in documentation or through the use of standard sizing rather than being displayed on the cylinder itself.

In practice, this means users and service personnel must refer to the specifications provided in the manufacturer's documentation or safety guidelines to understand the cylinder's capacity and ensure safe operation. Understanding this distinction is critical for anyone involved in the handling, usage, or inspection of LP-gas cylinders to maintain safety standards and comply with legal guidelines.