Which material is acceptable to use as a lubricant on oxygen system tapered pipe thread connections?

Teflon tape is acceptable to use as a lubricant on oxygen system tapered pipe thread connections because it is designed to provide a tight seal without the risk of ignition or combustion, which is critical in oxygen-rich environments. Unlike other materials, Teflon is chemically stable and does not react with oxygen, making it a safe choice for sealing connections in oxygen systems.

Using Teflon tape helps to prevent leaks by filling in gaps between threaded connections, ensuring a secure fit. It's important to avoid materials that could combust or degrade in the presence of oxygen, which is why grease, silicone, and oil are not appropriate choices. Grease and oil, for instance, can ignite in high-oxygen environments, leading to dangerous situations. Silicone can potentially break down and release harmful substances that could contaminate the oxygen system. Thus, Teflon tape stands out as the safest and most effective option for lubricating tapered pipe thread connections in oxygen systems.