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2. Solder ring fitting - Wikipedia

   en.wikipedia.org/wiki/Solder_ring_fitting

   To obtain functional joints, the inside of the fitting and the outside of the copper pipe are cleaned using steel wool or cleaning tape, flux paste is applied, the pipe is inserted into the fitting and heat is applied from a portable butane torch or propane torch until a ring of solder shows at the edges of the fitting. To obtain a durable ...

3. Soldering - Wikipedia

   en.wikipedia.org/wiki/Soldering

   Citric acid is an excellent water-soluble acid-type flux for copper and electronics [18] but must be washed off afterwards. Fluxes for soft solder are currently available in three basic formulations: Water-soluble fluxes – higher activity fluxes which can be removed with water after soldering (no VOCs required for removal).

4. Solder paste - Wikipedia

   en.wikipedia.org/wiki/Solder_paste

   Although solder paste typically contains around 90% metal in solids by weight, the volume of the soldered joint is only about half that of the solder paste applied. [7] This is due to the presence of flux and other non-metallic agents in the paste, and the lower density of the metal particles when suspended in the paste as compared to the final ...

5. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   The welding of metals differs from soldering and brazing in that the joint is made without adding a lower-melting-point material (e.g. solder); instead, the pipe or tubing material is partially melted, and the fitting and piping are directly fused. This generally requires piping and fitting to be the same (or compatible) material.

6. Flux (metallurgy) - Wikipedia

   en.wikipedia.org/wiki/Flux_(metallurgy)

   Rosin used as flux for soldering A flux pen used for electronics rework Multicore solder containing flux Wire freshly coated with solder, held above molten rosin flux. In metallurgy, a flux is a chemical reducing agent, flowing agent, or purifying agent. Fluxes may have more than one function at a time.

7. Solder alloys - Wikipedia

   en.wikipedia.org/wiki/Solder_alloys

   Crude solder for construction plumbing works, flame-melted. Used for soldering car engine radiators. Used for machine, dip and hand soldering of plumbing fixtures and fittings. Superior body solder. [52] Pb 70 Sn 30: 185 183: 255 257 [16] Pb: No: Sn30, UNS L54280, crude solder for construction plumbing works, flame-melted, good for machine and ...