One of the methods of arc welding with a fusible electrode with the protection of active or inert gas is the MIG / MAG process. It is applied to a wide range of materials of different thicknesses and types. Short-circuit transmission is used for welds of thinner sheets, it is also suitable for welding the roots of welds in thicker positions. Spray arc transmission applies to almost all materials. In the case of metal transfer with a mixed arc, the transfer of metal by a splash arc and a short circuit occurs at certain intervals. Pulsed arc transmission is applied in all positions, and to a wider range of thicknesses of a particular material. Certain parameters are required for each of these metal transfers. In MIG / MAG welding, shielding gases used are essential for the protection of the welding site itself. By applying shielding gases and the method of material transfer, depending on the thickness of materials used in welding, additional types of thickness from 0.6 to 2.4 mm are used. Welding of certain housing positions are performed according to the standards for a certain industry or according to the requirements of the client. The introduction of ISO standards in business is recognized as a significant factor in increasing competitiveness in the international market.