To bevel a tube means to reduce or to slim down the wall thickness of this tube at its edges. This needs to be done when the wall thickness is of more than 3 millimetres and allows therefore to prepare the assembly of the tubes/accessories.
Let us return to the question of the bevel, which will reduce the thickness of the tube in order to allow welding. Generally speaking, a tube with a wall thickness of more than 3 mm cannot be welded with only one layer in TIG welding.
If you need a high quality weld, the preparation of the pipe is essential. Several steps have to be followed before welding and the preparation of the bevel is most important. A high quality bevel ensures a clean and perfect weld. There are two ways to prepare a bevel.