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2. Electrofusion welding - Wikipedia

   en.wikipedia.org/wiki/Electrofusion_Welding

   Electrofusion pipe fitting. Electrofusion welding employs fittings that are placed around the joint to be welded. Metal coils are implanted into the fittings, and electric current is run through the coils to generate heat and melt part of the pipes, forming a joint upon solidification.

3. Spot welding - Wikipedia

   en.wikipedia.org/wiki/Spot_welding

   Spot welding (or resistance spot welding [1]) is a type of electric resistance welding used to weld various sheet metal products, through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric current.

4. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Polypropylene fittings for solvent welding. A solvent is applied to PVC, CPVC, ABS or other plastic piping to partially dissolve and fuse the adjacent surfaces of piping and fitting. Solvent welding is usually used with a sleeve-type joint to connect pipe and fittings made of the same (or compatible) material.

5. Electrofusion - Wikipedia

   en.wikipedia.org/wiki/Electrofusion

   The pipes to be joined are cleaned, inserted into the electrofusion fitting and then alignment clamps and a voltage (typically 40V) is applied for a fixed time depending on the fitting in use. The built in heater coils then melt the inside of the fitting and the outside of the pipe wall, which weld together producing a very strong homogeneous ...

6. Electric resistance welding - Wikipedia

   en.wikipedia.org/wiki/Electric_resistance_welding

   Spot welding is a resistance welding method used to join two or more overlapping metal sheets, studs, projections, electrical wiring hangers, some heat exchanger fins, and some tubing. Usually power sources and welding equipment are sized to the specific thickness and material being welded together.

7. List of welding codes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_codes

   Automotive arc welding (steel) AWS D8.9: Automotive spot weld testing AWS D8.14: Automotive arc welding (aluminum) AWS D9.1: Sheet metal welding AWS D10.10: Heating practices for pipe and tube AWS D10.11: Root pass welding for pipe AWS D10.12: Pipe welding (mild steel) AWS D10.13: Tube brazing (copper) AWS D10.18: Pipe welding (stainless steel ...