Instrumentation tube

Instrumentation tube carries fluid or pressure signals in measurement and control connections and is distinct from general process pipe. Connection integrity depends on matching the tube to its fittings; outside diameter, wall, hardness, roundness, and surface condition can affect compression-fitting performance. This identity does not impose one material or manufacturing route and must not be limited automatically to 316 stainless or seamless tubing. Selection should define medium and environment, material, dimensions, pressure and temperature, surface quality, bendability, and compatibility with the chosen fitting system.