Knowledge

24Sep, 2025

28.10. What are the solutions for crack defects?
Due to the significant impact of crack defects, it is essential to invest more effort into the inspection of these defects. During the welding process, it is necessary to make a re
19Sep, 2025

28.9. Crack defects?
Cracks are a common welding defect in rebar steel pipes, significantly affecting the safety of pipelines. They not only accelerate the corrosion rate of the steel pipes but also po
19Sep, 2025

28.8. What are the measures to address incomplete penetration and lack of fus...
Incomplete fusion and incomplete penetration defects are obviously closely related to the dimensions of the groove. Therefore, strict adherence to design requirements and specifica
19Sep, 2025

28.7. Lack of fusion and incomplete penetration defects?
During the welding process, there is a part of the steel plate that has no tendency to melt with the welding rod, which can lead to defects such as incomplete penetration or lack o
19Sep, 2025

28.6. What are the solutions to edge biting defects?
The main solution to edge biting defects is to properly control the welding current, which can largely prevent the occurrence of edge biting defects. By controlling the welding cur
15Sep, 2025

28.5. What are the causes of edge biting defects?
During the welding process, if a depression forms at the edge of the weld, causing the weld seam to be lower than the base material, this depression is known as edge burn-through d
15Sep, 2025

28.4. What are the solutions to the inclusions defect?
In order to improve the welding quality of spiral steel pipes and effectively resolve the slag inclusion defects, it is necessary to properly handle the groove dimensions. The groo
11Sep, 2025

28.3. What are the causes of夹渣 defects?
During the welding process, the welding rod and steel plate produce a certain amount of slag, and this slag cannot be completely eliminated, resulting in some residue remaining in
11Sep, 2025

28.2. What are the solutions for pore defects?
In order to better address the gas cavity defects in spiral steel pipe welding, it is necessary to treat the weld surface based on the principles of pore formation that are already
09Sep, 2025

28. What problems are likely to occur during the production of spiral welded ...
During the welding process of spiral steel pipes, if there are gas voids present in the weld surface or within the weld itself, this defect is referred to as a porosity defect. The
09Sep, 2025

27.13.1. What should be noted when chamfering?
(1) Layering and InclusionsWhen processing the pipe ends, operators should carefully check whether there are any layering or inclusions at the pipe ends. Steel pipes are not allowe
09Sep, 2025

27.13. What is the function of a chamfer?
After plasma cutting, the double-sided submerged arc welded pipe end with spiral seams may have defects such as uneven pipe ends, slanted cuts, slag, and length deviations. The mac

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