There is no such difference between a tube bender and a pipe bender. Though there is a difference between a tube and pipe, the difference lies in the way we measure them. While a pipe is measured with its inside diameter, a tube is measured by its outside diameter. The working principle of a tube and a pipe bender is nearly similar. Now, learning how does tube bender work will actually make you understand the whole thing quite easily. Using tools that are specifically designed to meet your requirement of bending tubes or pipes is always a better idea.