Most standard sizes of RTJ Ring Type Joints can be supplied with PTFE Coating. A PTFE Coating is used to eliminate gasket or flange erosion and is predominately used in aggressive media applications. PTFE Coating is typically used on R - Octagonal or R - Oval style RTJ's - Ring Joint Gaskets. They are available in a range of materials including 316 Stainless Steel, Soft Iron, Carbon Steel, Low Mild Steel, F5 and Super Duplex. The PTFE coating can be in various colors e.g. blue or green for ease of identification on site for installation.