2024-11-22
Exploring the welded tube making process-Welded Steel Pipe
Four different welding processes are typically used for making tube. Since there is no filler metal in these welds, the welds are at least as strong as the parent metals.High Frequency (HF) Welding. Today, most mild steel and aluminum tube is welded with HF welders, which are also suitable for 400 series stainless and even 300 series if the tubing is for decorative use.Nearly 95 percent of the HF welders sold are solid-state, using transistors to generate the alternating frequency current. Research has been undertaken to weld products less than 1/4 inch in diameter and to extend the ability of the welder to produce a pressure-quality weld on 300 stainless steel at high line speeds.