What does a color-coding system for gas cylinders indicate?

The color-coding system for gas cylinders is designed to quickly and effectively identify the type of gas contained within each cylinder. Each gas has a specific color associated with it, providing visual cues that help personnel recognize not only the gas type but also its associated hazards and usage guidelines. This system is particularly important in medical and industrial settings, where the correct handling and use of gases can be critical for safety and efficacy.

By quickly identifying the type of gas through its color, personnel can prevent improper connections or the accidental mixing of incompatible gases, which could pose significant safety risks. This helps ensure that patients receive the correct gases during medical treatments and that industrial processes utilize the appropriate gas for their applications.

In contrast, the other options do not accurately reflect the primary purpose of the color-coding system. While pressure levels and expiration dates are vital for safety and compliance, they are indicated in different ways—through gauges and markings on the cylinders, rather than a color system. Manufacturer identification is also separate from the color-coding system and is typically found on the cylinder's label or tag rather than associated with a specific color.