A333gr.6 steel pipe is made of low carbon alloy high-strength structural steel, which has high strength and low-temperature toughness, and at the same time, the requirements for the welded heat-affected zone are also very high. Therefore, the selection of suitable welding electrodes is crucial to ensure welding quality and safety.
For the welding of A333gr.6 seamless steel pipe, common welding rods include E309MoL, E309, E347 and so on. The selection of these welding rods needs to be determined according to the specific welding requirements and working conditions. Among them, E309MoL welding rod is specially designed for the welding of A333gr.6 seamless steel pipe, with excellent welding process performance and anti-cracking properties, to meet the welding requirements of low-temperature pipelines.
1. the steel pipe needs to be preheated before welding in order to reduce the cooling rate during the welding process and reduce the generation of welding cracks.
2. Select suitable welding rods, and dry and keep warm according to the requirements of the instructions to ensure the quality of welding rods and welding effect.
3. During the welding process, suitable welding parameters and welding sequence need to be adopted to ensure the welding quality and welding efficiency.
4. After the welding is completed, post heat treatment and post-welding inspection are required to ensure the safe use of the pipeline.
