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Chapter 8: Welding methods
H.F. high frequency
Welding method is carried out for the production of tubes having structural purposes as well as for
the production of car exhaust-systems. For these applications, the HF method is preferred because
of its advantages in terms cost effective productivity. On the contrary, the small weld seam obtained
with High Frequency (see picture n° 3 – x50), cannot always grant the optimum in terms of
workability, withstanding of pressure and corrosion resistance due to the lack of fusion of strip edge
and the oxide formation on the weld edges.
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