Editor's Note: This is the first article in a three-part series on cutting, removing, and disposing of weld beads. Part I discusses the reasons to remove the weld bead and equipment parameters, that affect the scarfing process. Part II, which will appear in the September issue, will discuss manual and automated removal processes. Part III, which will appear in the October/November issue, will discuss strategies for improving ID weld bead removal and disposal. commonly used methods of welded tube and pipe production create an upset, or weld bead, on both the OD and ID. This is true for any variation of electric resistance welding (ERW), whether it uses high-frequency (HF) or direct current (DC), and regardless of the current transfer method, such as contact wheels, shoes, or induction coils. Fusion welding methods, such as gas tungsten arc welding (GTAW), plasma, and laser, can produce thickness variations but normally do not produce weld bead upset zones unless hot forging is used.
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