Why is it critical to strictly limit the flow velocity when measuring oxygen?

Answer: Oxygen is a strong combustion-supporter. If high-speed oxygen flows encounter impurities or protrusions inside the pipe, the resulting friction heat can potentially ignite the pipeline itself. For safety, flow velocities must be strictly limited based on the pipe material and operating pressure (e.g., lower limits for higher pressures). Stricter limits apply if the flow directly impacts obstacles like valves or elbows.