Steel tube  are found in many different industries and products. You can find them in stairways and railings, and they’re also often used to reduce gas leaks in buildings and structures. In addition, they’re used to carry fluids and gases as well as serve as support structures. They’re also commonly seen in a variety of construction projects, including highways and bridges. In fact, you’re probably familiar with steel tubing from various standard appliances in your own home.

Despite their common appearance, most people don’t know there are distinct differences between pipes and steel tubing. While they both embody a hollow cylindrical shape, their similarities end there. Both can be either seamless or welded, but they have very different standards, measurements and uses. In addition, pipes are usually measured by inside diameter and tubes are typically measured by outside diameter.

Understanding the Types and Grades of Steel Tubes: A Comprehensive Guide

Tubes may be cold rolled, hot rolled, galvanized or painted to add strength or aesthetics. Generally speaking, tube sizes are more precise than pipe schedules and dimensions, as they’re made using complex methods that require more accurate dimensional tolerances.

The most important microelements for tube are its pressure rating, ductility and yield strength properties. Meanwhile, for pipe, tensile strength and hardness are the most crucial characteristics. Pipes are also often required to undergo sour cleaning and special polish treatment for field transporting and underground applications. Lastly, joining steel pipes requires a labor intensive process such as welding, flanges or threading.