Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines
In view of the incomplete fusion occurred in the automatic girth welding of oil and gas pipelines, the factors influencing the incomplete fusion were studied with the welding procedure test and numerical simulation in combination. The results show that the swing width of the welding torch gradually...
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| Format: | Article |
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Editorial Office of Oil & Gas Storage and Transportation
2023-10-01
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| Series: | You-qi chuyun |
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| Online Access: | https://yqcy.pipechina.com.cn/cn/article/doi/10.6047/j.issn.1000-8241.2023.10.010 |
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| author | Zhili LUO Yongli SUI |
| author_facet | Zhili LUO Yongli SUI |
| author_sort | Zhili LUO |
| collection | DOAJ |
| description | In view of the incomplete fusion occurred in the automatic girth welding of oil and gas pipelines, the factors influencing the incomplete fusion were studied with the welding procedure test and numerical simulation in combination. The results show that the swing width of the welding torch gradually increases for welding within the range from 3:00 to 6:00 o'clock. During this process, the welding process has the welding current decreased and the welding speed slowed down if the heat input remains unchanged. In this case, a larger swing width is helpful to increase the welding pool depth on the groove wall, thus guaranteeing the stability of weld droplet transition and reducing the risk of incomplete fusion on the wall. Besides, the weld morphology at the position of 4:30-6:00 was very poor, and the "hump weld" in the current pass will increase the probability of incomplete fusion in the next pass. In addition, the welding temperature field is in a serrated shape during the swing welding, which can be effectively eliminated at the swing frequency of 5 times/s or above. The research results can provide reference for improving the quality and efficiency of pipeline automatic welding. |
| format | Article |
| id | doaj-art-df46ca81b37a43f2b0661205d7c922d2 |
| institution | Kabale University |
| issn | 1000-8241 |
| language | zho |
| publishDate | 2023-10-01 |
| publisher | Editorial Office of Oil & Gas Storage and Transportation |
| record_format | Article |
| series | You-qi chuyun |
| spelling | doaj-art-df46ca81b37a43f2b0661205d7c922d22025-01-17T06:49:20ZzhoEditorial Office of Oil & Gas Storage and TransportationYou-qi chuyun1000-82412023-10-0142101166117410.6047/j.issn.1000-8241.2023.10.010yqcy-42-10-1166Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelinesZhili LUO0Yongli SUI1Construction Project Management Sub-Company, China Oil & Gas Pipeline Network CorporationChina Petroleum Pipeline Research Institute Co. Ltd.//National Engineering Research Center for Pipeline SafetyIn view of the incomplete fusion occurred in the automatic girth welding of oil and gas pipelines, the factors influencing the incomplete fusion were studied with the welding procedure test and numerical simulation in combination. The results show that the swing width of the welding torch gradually increases for welding within the range from 3:00 to 6:00 o'clock. During this process, the welding process has the welding current decreased and the welding speed slowed down if the heat input remains unchanged. In this case, a larger swing width is helpful to increase the welding pool depth on the groove wall, thus guaranteeing the stability of weld droplet transition and reducing the risk of incomplete fusion on the wall. Besides, the weld morphology at the position of 4:30-6:00 was very poor, and the "hump weld" in the current pass will increase the probability of incomplete fusion in the next pass. In addition, the welding temperature field is in a serrated shape during the swing welding, which can be effectively eliminated at the swing frequency of 5 times/s or above. The research results can provide reference for improving the quality and efficiency of pipeline automatic welding.https://yqcy.pipechina.com.cn/cn/article/doi/10.6047/j.issn.1000-8241.2023.10.010oil and gas pipelineautomatic weldinggirth weldincomplete fusion |
| spellingShingle | Zhili LUO Yongli SUI Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines You-qi chuyun oil and gas pipeline automatic welding girth weld incomplete fusion |
| title | Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines |
| title_full | Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines |
| title_fullStr | Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines |
| title_full_unstemmed | Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines |
| title_short | Factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines |
| title_sort | factors influencing incomplete fusion in automatic girth welding of oil and gas pipelines |
| topic | oil and gas pipeline automatic welding girth weld incomplete fusion |
| url | https://yqcy.pipechina.com.cn/cn/article/doi/10.6047/j.issn.1000-8241.2023.10.010 |
| work_keys_str_mv | AT zhililuo factorsinfluencingincompletefusioninautomaticgirthweldingofoilandgaspipelines AT yonglisui factorsinfluencingincompletefusioninautomaticgirthweldingofoilandgaspipelines |