


Flange welding has strict requirements for material matching and welding process. Common base materials include carbon steel, stainless steel, chrome-molybdenum alloy steel, etc., matching electrodes and wires with the same or equivalent strength shall be selected.

TIG welding is usually used for root pass, while arc welding or MIG/MAG welding for filling and capping. Controlling interpass temperature, deformation and stress ensures mechanical properties, corrosion resistance and sealing reliability, meeting the safety requirements of pressure pipelines and equipment.