Process that creates connections between metal pieces by heat and/or pressure, with or without the addition of another filler metal. The smelting area must be protected from oxidation phenomena, and the molten metal must be purified of slag.

The filtration of these processes must therefore take into account the following specific parameters:

  • Air with greasy/oily fumes, high temperature toxic vapors and gases, chemical compounds created by residues of degreasers, lubricants and paints melted at high temperatures
  • Dust with fine particle size
  • Retained impurities that are irritating, toxic and carcinogenic (e.g. arsenic, cadmium, chromium VI and nickel)
  • High risk of fire/explosion (presence of greasy/oily particles and high temperature sparks)