What is the first step in the preparation for silver brazing?

The first step in preparation for silver brazing is to ensure that the pipe end is true to 90 degrees. Accurately cutting the pipe end creates a proper fit between the two components being joined, which is crucial for achieving a strong and leak-free bond during the brazing process. A true end promotes even heat distribution, facilitates the proper alignment of the joint, and allows for effective capillary action when the filler metal is applied.

Other steps, while important, follow the initial preparation of the pipe end. Checking clearance ensures a tight fit, removing surface oxides enhances surface quality for better adhesion, and expanding the pipe end might be necessary depending on the assembly requirements. However, these tasks are contingent on first achieving a correctly cut and aligned workpiece.