What is the function of risers in a medical gas pipeline system?

The function of risers in a medical gas pipeline system is primarily to connect branch lines to the system mains. Risers serve as vertical pathways that allow the distribution of medical gases from horizontal mains to various levels or areas within a facility. This is essential for ensuring that medical gases reach different floors or sections where they are needed, such as patient rooms, operating theaters, or other medical service areas.

Their design and placement are critical for maintaining the integrity of the gas supply while adhering to safety standards outlined in NFPA 99, which governs medical gas systems. Properly installed risers ensure that gases can be efficiently and safely transported vertical distances without undue pressure loss or contamination.

Other options presented do not capture the primary function of risers. For instance, controlling gas pressure is typically managed by regulators and pressure monitors rather than by risers themselves. Similarly, the storage of gases within a facility is handled through dedicated storage areas or cylinders, not through risers. Finally, filtering medical gases is a separate process involving filters designed to remove impurities, rather than a function of risers. Thus, the designation of risers as connectors in pipeline systems clarifies their vital role in medical gas distribution.