Welding equipment: Welding machines are used for root welding; multi-functional automatic pipe welding equipment is used for filling and capping.
Welding materials: φ3.2 E6010 cellulose electrode is used for root welding; φ2.0 flux-cored self-protected welding wire is used for filling and cover.
Bevel cleaning: Before assembly, clean the bevel first. Use an angle grinder or electric wire brush to remove oil, rust, water, and other dirt within 25mm of the bevel and the edges of the front and back until all metallic luster is exposed.
Nozzle pairing: The steel pipe nozzle pairing directly affects the quality of root welding and must be carried out strictly according to the welding process parameters. The blunt edge of the groove is controlled within the range of 0.5~2.0mm; the groove gap is strictly controlled at 2.5~3.5mm. The top is 2.5mm and the bottom of the nozzle is 3.5mm.