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2. Electric resistance welding - Wikipedia

   en.wikipedia.org/wiki/Electric_resistance_welding

   Low-frequency electric resistance welding (LF-ERW) is an obsolete method of welding seams in oil and gas pipelines. It was phased out in the 1970s but as of 2015 some pipelines built with this method remained in service. [3] Electric resistance welded (ERW) pipe is manufactured by cold-forming a sheet of steel into a cylindrical shape.

3. Radio-frequency welding - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_welding

   Radio-frequency welding, also known as dielectric welding and high-frequency welding, is a plastic welding process that utilizes high-frequency electric fields to induce heating and melting of thermoplastic base materials. [1] The electric field is applied by a pair of electrodes after the parts being joined are clamped together.

4. List of welding processes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_processes

   Air acetylene welding (321) AAW Chemical welding process, not popular Limited Oxyacetylene welding: 311: OAW Combustion of acetylene with oxygen produces high-temperature flame, inexpensive equipment Maintenance, repair Oxygen/Propane welding 312: Gas welding with oxygen/propane flame Oxyhydrogen welding: 313: OHW

5. Induction welding - Wikipedia

   en.wikipedia.org/wiki/Induction_welding

   Induction welding is a form of welding that uses electromagnetic induction to heat the workpiece. The welding apparatus contains an induction coil that is energised with a radio-frequency electric current. This generates a high-frequency electromagnetic field that acts on either an electrically conductive or a ferromagnetic workpiece.

6. Welding - Wikipedia

   en.wikipedia.org/wiki/Welding

   One of the most popular, ultrasonic welding, is used to connect thin sheets or wires made of metal or thermoplastic by vibrating them at high frequency and under high pressure. [48] The equipment and methods involved are similar to that of resistance welding, but instead of electric current, vibration provides energy input.

7. List of manufacturing processes - Wikipedia

   en.wikipedia.org/wiki/List_of_manufacturing...

   Guerin process; Wheelon process ... High frequency (induction resistance; 200–450 kHz) ... Solvent; Dielectric; Magnetic pulse welding; Radio frequency welding ...