What type of service should Teflon paste not be used on?

Teflon paste is commonly used as a thread sealant in various piping and service applications due to its durability and resistance to a wide range of chemicals. However, it should not be used in oxygen service because Teflon, or polytetrafluoroethylene (PTFE), can pose a significant risk when in contact with pure oxygen.

In an oxygen-rich environment, Teflon can become chemically reactive, potentially leading to combustion or explosion due to the high energy associated with oxygen. When Teflon paste is used on oxygen service, the risk of fire hazards and violent reactions greatly increases, especially if there are any impurities or contaminants present.

As such, alternative sealants that are specifically designed and certified for use in oxygen service should be employed to ensure safety and compliance with industry standards. This makes the choice of avoiding Teflon paste in oxygen service a crucial consideration for maintaining safety protocols in industrial environments.