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Measures for Cracking of Welded Pipes Based on Flattening Tests

Posted: 11/19/2022 22:36:04 Hits: 8

3. Measures for cracking of welded pipes based on flattening tests
3.1 Improving the welding level
Since the level of the welding process will have a direct impact on the flattening test results, which is one of the main reasons for the cracking of the welded pipe, it is necessary to pay attention to the welding process of the welded pipe and improve the welding quality. First, the operators should be trained on the operation steps to improve the professional level of the operators and ensure the high quality of the operation. Second, the welding conditions should be precisely controlled, such as the amount of molten metal extruded by welding and welding temperature to ensure the welding seam will not crack due to external factors, which will affect the workability and pressure resistance of the welded pipe. Third, the existing welding process should be optimized, and the welding method should be optimized and improved according to the requirements of the welder and the welding performance index to ensure that the existing welding plan is the optimal process plan.

3.2 Doing a good job of impurity treatment
To reduce the impurity of the welded pipe, it is necessary to do a good job in the analysis and control of indicators in all aspects of manufacturing welded pipes, to standardize the implementation of various operations of chemical treatment, do a good job in component analysis at each stage, and to determine the subsequent links according to the chemical composition of the ore. The necessary treatment of impurities such as oxides and sulfides are required. For example, in the process of iron and steel making, the changes of each element are monitored in real time to ensure the standardization and scientificity of each step of the operation. Ensure that the impurity of the steel is effectively reduced in the smelting process. In the forming process of steel, it is necessary to do a good job in the analysis of the compound and the utilization of its characteristics. According to the requirements of the use of steel, the necessary treatment of harmful impurities should be done well.

3.3 Controlling the manufacturing process
Before carrying out the flattening test of the welded pipe, formulate the flattening test plan. Discuss and select it, and strictly control the production process of the welded pipe according to the specific requirements of the flattening test performance of the butt-welded pipe to ensure that the physical properties and chemical performance indicators are optimized to avoid cracking during the flattening test of the welded pipe. It is necessary to strictly control the composition of the welded pipe, and formulate physical and chemical performance indicators according to the composition analysis results of different materials to provide accurate target parameters for the experiment. In addition, the implementation details of the pressurization technology of the welded pipe are optimized to achieve the goal of improving the overall quality of the welded pipe by selecting advanced production equipment and production technology.

4. Conclusion
Welded pipes are more and more used and account for an important part of the steel market. Therefore, it is particularly important to improve the quality of welded pipes. Relevant institutions should increase the research on flattening tests of welded pipes. According to the operation specification requirements of the flattening test and the experimental objectives to be achieved, the flattening test of the welded pipe is carried out scientifically, and the factors causing the experimental cracking are studied and controlled to ensure the reliability and accuracy of the experimental results. According to the cracking situation of the test, the technicians can accurately judge the quality of the welded pipe, determine whether the welded pipe has defects, find out the reasons for the defects of the welded pipe, and control from the aspects of raw materials, production operations and management, and slay a solid foundation for the production of high-quality welded pipes.

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