Knowledge

1) General provisions ① This chapter is applicable to manual arc welding and argon arc welding of on-site welding equipment and pipelines of carbon steel with carbon content less t

1. When welding, the arc length should not be too long, and the welding pool should not be too large, otherwise it will cause poor weld formation or air holes. 2. Be sure to contro

1. Do not knock off the coating after welding, so as to slow down the cooling of the weld bead. After the weld bead cools down, knock off the coating and clean the weld bead. 2. Im

1. The steel pipe should be placed at a distance of not less than 1mm from the edge of the pipe ditch that has been shaped to prevent the collapse of the pipe ditch from hurting pe

1. The nozzle has been cleaned up to the standard according to the cleaning requirements. 2. Special nylon slings for hanging pipes must be used for hoisting steel pipes at the cou

1. All welders who perform welding must hold the examination certificate or employment certificate issued by the unit designated by the owner. 2. All welding welders must hold the

1. When the welding consumables are brought back into the warehouse from the owner's warehouse, the person in charge of the materials should inspect them together with the technica

1. Preheating should keep the temperature constant throughout the welding process to facilitate the overflow of diffusible hydrogen and slow cooling after welding. 2. Since gas shi

1. Put the all-position pipeline automatic welding machine welding trolley on the pipe section or workpiece and add the secondary line; 2. Press the down button on the operation pa