H beam steel structure construction welding process

Welding steel beam adopts gantry automatic submerged arc welding. Beam connection plate ribbed plate adopts manual welding. Using gantry automatic welding shall meet the following two points:
(1) After welding, within edge scope of 30-50mm, the rust, burrs, dirt and etc must be clean, in order to reduce welding defects such as porosity factor.
(2) End tab should be the same as the parent metal material, welding groove forms, the same length should comply with the provisions of the standard. Using manual arc shall meet the following requirements: use in good condition, fully functional electric welding machine, selection of electrode need drying box for drying.