Tubing

About tubing

Tubing serves as a conduit for fluids and gases in pneumatic, hydraulic, and process control systems. Selection is primarily driven by application requirements concerning pressure, temperature, chemical compatibility, and flexibility. Common types include polyurethane, known for its flexibility and abrasion resistance, often used in pneumatic and robotic applications. Nylon tubing offers higher pressure ratings and good chemical resistance, suitable for air, oil, and some chemical transfer. PTFE (Polytetrafluorofluoroethylene) tubing provides excellent chemical inertness, high-temperature resistance, and a low coefficient of friction, making it ideal for aggressive media or high-purity applications. Metallic tubing, such as copper and stainless steel, is specified for high-pressure, high-temperature, or structural applications. Copper tubing is frequently used for refrigeration, HVAC, and some hydraulic lines, while stainless steel offers superior corrosion resistance and strength for demanding industrial and hygienic environments. Tubing is typically specified by its Outer Diameter (OD) and wall thickness, which together determine the Inner Diameter (ID) and pressure rating. Standard ODs include metric sizes (e.g., 4mm, 6mm, 8mm, 10mm, 12mm) and imperial sizes (e.g., 1/8", 1/4", 3/8", 1/2"). Pressure ratings are critical and must exceed maximum system operating pressure, often with a safety factor. Material composition dictates chemical compatibility and temperature limits. Flexibility is also a key consideration, particularly for dynamic applications or tight bend radii.