Steel pipe welding equipment: ZX7-400-3 welding machine is used for root welding; Kumagai ZD-500 multifunctional automatic pipeline welding equipment is used for filling and covering.
Steel pipe welding materials: Bole φ3.2 E6010 cellulose electrode is used for root welding; Lincoln E81T8-G φ2.0 flux cored self-shielded welding wire is used for filling and covering.
Groove cleaning of steel pipes: before assembly, the grooves should be cleaned first. Use an angle grinder or an electric wire brush to remove oil, rust, water, and other dirt within 25mm of the groove and the front and back edges until the metal luster is completely exposed.
Nozzle group pair of steel pipe: The nozzle group pair directly affects the root welding quality and must be carried out in strict accordance with the welding process parameters. The blunt edge of the groove is controlled within the range of 0.5-2.0mm; The top of the orifice is 2.5mm and the bottom of the orifice is 3.5mm.
