PTFE tubes can operate stably at 260°C for long-term use and withstand temperatures above 300°C for short periods. Its heat resistance originates from high-energy C-F chemical bonds, helical molecular conformation and high crystallinity, which prevent the molecular structure from cracking, oxidizing or deforming under high temperatures. The 260°C threshold is the long-term service limit determined by balancing mechanical properties and safety. Excessively high temperatures will lead to reduced strength, deformation, and even the release of toxic decomposition products. Read More