What pressure defines a high-pressure DOT cylinder?

A high-pressure DOT cylinder is defined as having a pressure of 501 PSI or greater. This classification is important because it dictates specific regulations regarding the design, construction, testing, and maintenance of these cylinders. High-pressure cylinders are typically used for compressed gases like oxygen, carbon dioxide, or other industrial gases, and understanding these criteria ensures that safety protocols are followed when transporting and using these cylinders.

Choosing the correct pressure threshold helps distinguish between different types of cylinders, with lower pressure ratings falling under different DOT regulations. Therefore, understanding the parameters of high-pressure cylinders is crucial for safety and compliance in scenarios where they are employed.