The main difference between steel pipes and steel tubing lies in their construction and dimension specifications. While at times these terms may be applied interchangeably there are usually some technical differences. Pipes often have uniform standard of reference globally while those of the tubing may vary. It is also important to note that pipes are denoted by their inside diameter and the tubes being referred by their outside diameter. The gauge or the thickness of construction is varied during construction of tubes, thus tubes may have a higher tolerance for pressure as compared to conventional pipes.