difference between aluminum tube and aluminum pipe

In this article, experts from Mirach Metallurgy Co.,Limited share difference between aluminum tube and aluminum pipe.  Before purchase aluminum tube products, you should keep the following idea in mind.

A brief discussion of the difference between pipe and tube:
Pipe is generally more rigid than tube, and is usually produced in heavier wall thicknesses.
Pipe is specified by a nominal dimension which bears little or no resemblance to the actual dimensions of the pipe. 1″ Schedule 40 pipe, for instance, has an actual OD of 1.32″, a wall of 0.133″, and an inner diameter of 1.049″. Tube dimensions are actual dimensions.
Pipe fittings are sized to meet pipe sizes, but not tube sizes. A 1″ schedule 40 nipple will fit correctly on a 1″ schedule 40 pipe, but not on a 1″ OD tube.