The terms tube and pipe are interchangeable?

Study for the Gas Metal Arc Welding Exam, including GMAW, FCAW, and MCAW methods. Use flashcards and multiple choice questions with hints and explanations for effective learning. Get ready for your welding certification!

Tube and pipe are not interchangeable because they follow different sizing standards and have different intended uses. Pipe is sized by inside diameter and wall thickness using nominal pipe size, with an outer diameter that varies by schedule; it’s meant for conveying fluids or gases and commonly uses threaded, socket-weld, or butt-weld connections. Tube is sized by outside diameter and wall thickness, with tighter tolerances, and is used for mechanical or structural applications where precise fit is needed; ends are prepared for compression, flare, or welded connections rather than standard pipe threads. Because of these differences in dimensions, tolerances, and fittings, a tube won’t seamlessly replace a pipe and vice versa.