PTFE Lined Pipe: Thickness, Pressure Rating & Size Selection Guide for Engineers
What This Guide Covers PTFE lined pipe is the workhorse of corrosive fluid handling in chemical, pharmaceutical, and semiconductor manufacturing. This guide provides engineers with a rigorous framework for selecting liner thickness, verifying pressure ratings across ANSI classes 150 to 900, choosing correct nominal pipe sizes (NPS ½" to 24"), and accounting for temperature-pressure derating — all with reference tables you can use directly in design documents. Table of Contents What Is PTFE Lined Pipe? Liner Thickness Selection Pressure Ratings by ANSI Class Temperature–Pressure Derating Pipe Size Selection Methodology Full Selection Reference Table Common Engineering Mistakes Frequently Asked Questions 01 What Is PTFE Lined Pipe? PTFE (polytetrafluoroethylene) lined pipe consists of a carbon steel, stainless steel, or ductile iron outer shell with a continuous PTFE fluoropolymer tube mechanically or hydraulically expanded and locked inside it. The result is a pipe that comb...