Engineering

Analyzing Weld Quality in LPG Storage Tanks Using Statistical Process Control Tools

Authors

  • E. M. Badawi

    Department of Mechanical Engineering, Sudan University of Science and Technology, Khartoum, Sudan
    Author

  • HASSAN OSMAN ALI MOHAMMED

    Hassan Osman Sudan University of Science and Technology College of Engineering Department of Mechanical Engineering Associate Professor
    Author

  • wheeb khalid Mohmed ahmed alfadel

    Mechanical engineer
    Author

DOI:

https://doi.org/10.71107/gbdb3180

Keywords:

Quality Management, Defect Analysis, Statistical Process Control(SPC, Welding Inspection, Pareto Analysis

Abstract

This paper presents a comprehensive analysis of weld quality in Liquefied Petroleum Gas (LPG) storage tanks at Bajrawiya Oil and Gas Equipment Plant. Utilizing historical inspection data from 2016 to 2019, the study identifies common welding defects such as porosity, undercut, lack of fusion, and misalignment. Findings indicate that process variability, operator skill level, and equipment maintenance significantly impact weld integrity. Recommendations include enhancing training programs, standardizing welding procedures, and implementing continuous monitoring using SPC tools. This research contributes to improving quality assurance practices in the manufacturing of pressure vessels and ensuring compliance with international standards such as ASME, API, and ISO~5817.

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Author Biographies

  • E. M. Badawi, Department of Mechanical Engineering, Sudan University of Science and Technology, Khartoum, Sudan

    Department of Mechanical Engineering, Sudan University of Science and Technology, Khartoum, Sudan

  • HASSAN OSMAN ALI MOHAMMED, Hassan Osman Sudan University of Science and Technology College of Engineering Department of Mechanical Engineering Associate Professor

    Academic Background :
     2011 – 2012 Post- Doctoral (composite material)
    2007 – 2011 PhD in Mechanical Engineering - Faculty of Mechanical Engineering Universiti Teknologi 
    Malaysia-Skudai, Johor Bahru Malaysia.
    2004-2006 Master of Engineering (Mechanical) - Faculty of Mechanical Engineering Universiti 
    Teknologi Malaysia.
    1995-2000 Bachelor Degree in Mechanical Engineering (First class honor), Sudan University for Science
    and Technology, Sudan.

     Area of Expertise 
    Materials and Solid Mechanics,
    Mechanical Engineering and Applied Mechanics
    -Creep , Fatigue and Fracture Mechanics
    -Computational Solid Mechanics / FEM

  • wheeb khalid Mohmed ahmed alfadel, Mechanical engineer

    Currently, I study Master in Mechanical Engineering ( Sudan University of Science & Technology,
    Collage of Graduate Studies)
     

    B.Sc. honours in Manufacturing Engineering from Nile
    Valley University – Faculty of Engineering and Technology
    2018.
    Diploma Certificate (Three year) in Mechanical
    Engineering (Production) from Sudan University of
    Sciences & Technology, 2006

References

[1] Aleksander stepanov, Andre laansoo application of Statistical Methods in Assessing Quality of Welding, 4th international DAAAM Conference. Industerial engineering invnovtion as Competitve edge forSME. 29-30th Abril 2004, Tallinn Estonia.

[2] ANNA ERICSON ÖBERG, Predictability – an enabler of weld production development. Ph.D theses Chalmers University of Technology Gothenburg, 2016

[3] Christopher T. Mgonja, The Failure Investigation of Fuel Storage Tanks Weld Joints in Tanzania. International Journal of Mechanical Engineering and Technology, 8(4), 2017, pp. 128–137.

[4] George E. Cook, Joseph E. Maxwell, Robert Joel Barnett, and Alvin M. Strauss. Statistical Process Control Application to Weld Process IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 33, NO. 2, MARCH/APRIL 1997, DOI: https://doi.org/10.1109/28.568010

[5] James I Change, cheng-Chung Lin, Study of Storage Tank Accedents. Jurnal of loss prevention in the process industries . Elesvier 19 (2005) 51-59 DOI: https://doi.org/10.1016/j.jlp.2005.05.015

[6] Juran, J. M. (1999). Juran's Quality Handbook. McGraw-Hill.

[7] Montgomery, D. C. (2020). Introduction to Statistical Quality Control (8th ed.). Wiley.

[8] Mubarok, M. Z.,& Machfuroh, T.(2024). Welding quality controlof SS400 steel for ducting at PT. XYZ with SQC method. G-Tech: Journal of applied technology 8(4),2178-2189. DOI: https://doi.org/10.70609/gtech.v8i4.4776

[9] NASA SP-8088 SPACEVEHICLE DESIGNCRITERIA (CHEMICAPLROPULSION) LIQUIDROCKET METALTANKS ANDTANKCOMPONENTS

[10] Novita Ramadayanti, Akmal Suryadi, "Welding Quality Control Using The Sqc (Statistical Quality Control) Method In An Effort To Minimize The Occurrence Of Rejects At Pt.XYZ" International Journal of Mechanical, Industrial and Control Systems Engineering Volume.1, Nomor.4 December 2024, Page 43-55 DOI: https://doi.org/10.61132/ijmicse.v1i4.125

[11] Peter Hammersberg , Hasse Olsson, Statistical evaluation of welding quality in production Proceedings of the Swedish Conference on Light Weight Optimized Welded Structures, March 24-25, 2010, Borlنnge, Sweden

[12] Saadat Ali Rizvi, Wajahat Alib Welding Defects, causes and TheirRemedies: A review Teknomeknik ,2(2) 2019 pp12-15 DOI: https://doi.org/10.24036/tm.v2i2.3272

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Published

2026-05-08

Data Availability Statement

The data will be provided by the request

Issue

Vol. 2 No. 1 (2026): Conclusions in Engineering

Section

Articles

License

Copyright (c) 2026 E. M. Badawi, HASSAN OSMAN ALI MOHAMMED, wheeb khalid Mohmed ahmed alfadel (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Analyzing Weld Quality in LPG Storage Tanks Using Statistical Process Control Tools. (2026). Conclusions in Engineering, 2(1), 57-62. https://doi.org/10.71107/gbdb3180

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