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International Petroleum and Petrochemical Technology Conference

IPPTC 2018: Proceedings of the International Petroleum and Petrochemical Technology Conference 2018 pp 187–195Cite as

Analysis on the Cause of the Defects of the Weld Seam in a Butt Welded Flange Ring

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Abstract

The causes of the crack formation were analyzed by macroscopic analysis, ultrasonic testing, chemical composition analysis, metallographic analysis, and energy spectrum analysis. The result shows that the cracks originate between the welding consumables and the base metal and both ends were smoothed and expanded along the circumferential direction of the weld. The residual coating of the slag in the weld and the non-fusion defect between the layers are the internal causes of the formation of the crack. Weld cracks are caused by improper control of welding parameters.

Keywords

  • Flange
  • Not fused
  • Crack

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Authors and Affiliations

  1. Tubular Goods Research Center of CNPC, 710065, Xi’an, China

    Xiang Zhang, Ke Cai & Tingting Qu

Authors
  1. Xiang Zhang
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  2. Ke Cai
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  3. Tingting Qu
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Corresponding author

Correspondence to Xiang Zhang .

Editor information

Editors and Affiliations

  1. Rapid Response Institute, Houston, TX, USA

    Dr. Scott. M. Shemwell

  2. School of International Education, Xi’an Shiyou University, Xi’an, Shaanxi, China

    Dr. Jia'en Lin

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Zhang, X., Cai, K., Qu, T. (2019). Analysis on the Cause of the Defects of the Weld Seam in a Butt Welded Flange Ring. In: Shemwell, S., Lin, J. (eds) Proceedings of the International Petroleum and Petrochemical Technology Conference 2018. IPPTC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-2173-3_18

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  • DOI: https://doi.org/10.1007/978-981-13-2173-3_18

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  • Publisher Name: Springer, Singapore

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  • Online ISBN: 978-981-13-2173-3

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