ANALYSIS OF WELDING POROSITY DEFECT CONTROL USING STATISTICAL QUALITY CONTROL (SQC) METHOD IN FABRICATION COMPANIES
Published:
2026-09-11Downloads
Abstract
This study aims to analyze the control of welding defects in carbon steel materials at company fabrication, specifically within the Marjan Saudi Aramco project. The primary issue identified is the fluctuation in welding defect rates on pipe production, which poses a risk to offshore structural integrity. The methodology employed is Statistical Quality Control (SQC), utilizing check sheets, Pareto diagrams, p-charts, and fishbone diagrams to identify the types and root causes of defects. Data was collected from July to December 2025, covering a total welding length of 384,000 mm. The results indicate an average defect rate of 2.63%, with the most dominant defect types being porosity (35.91%) and slag inclusion (34.57%). Control chart analysis shows that despite the fluctuations, the process remains statistically in control. Through the fishbone diagram, it was determined that method and material factors are the primary causes of defects. Improvement recommendations focus on standardizing welding parameters, enhancing operator skills through training, and strengthening material cleaning procedures prior to fabrication to minimize reject rates
Keywords:
Carbon Steel Welding Statistical Quality Control (SQC) Quality Control.References
Agboola, O., & Ikubanni, P. (2017). Application of Statistical Quality Control (Sqc) in the Calibration of Oil Storage Tanks. Journal of Production Engineering, 20(1), 127–132. https://doi.org/10.24867/jpe-2017-01-127
Bakhtiar, S., Tahir, S., & Hasni, R. A. (2013). Analisa Pengendalian Kualitas Dengan Menggunakan Metode Statistical Quality Control (SQC). Malikussaleh Industrial Engineering Journal, 2(1), 29–36. https://103.107.186.27/miej/article/viewFile/26/17%0Ahttps://www.mendeley.com/catalogue/090dd3e8-7ab9-3d9d-a098-98a8f093fd2a/?utm_source=desktop&utm_medium=1.19.8&utm_campaign=ope
Berbasis, S., Processing, I., Yolov, M., Mustajib, I., Rizal, N., Sandjaja, I. E., & Triputrastyo, T. (2024). PROSIDING SEMINAR NASIONAL KUSUMA III Kualitas Sumberdaya Manusia PROSIDING SEMINAR NASIONAL KUSUMA III Kualitas Sumberdaya Manusia. 2, 20–31.
Budiono, H. S., Purnomo, S. J., Gastiadirrijal, M. N., Setio, W., Tidar, U., & Java, C. (2026). Development of a Portable Laser Engraving System for Small-Scale Manufacturing Applications. 11(1), 21–28.
Darmawan, Rizqi, K. & M. D. (2022). Analisis Pengendalian Kualitas Produk Tempe Dengan Metode Statistical Quality Control (SQC) Di CV. Aderina. SITEKIN : Sains, Teknologi Dan Industri, 19(22), 295–300. https://ejournal.uin-suska.ac.id/index.php/sitekin/article/view/17413
Devindra, S. N., Ananda, R., Munang, A., & Aliyah, K. (2025). Analisis Quality Control Proses Instalasi Jaringan PT . XYZ Dengan Metode Statistical Quality Control ( SQC ) Quality Control Analysis of PT XYZ Network Installation Process with Statistical Quality Control ( SQC ) Method. 10(01).
Faiq, M. R. Al, Hastuti, S., & Mulyaningsih, N. (2025). Defect analysis of butt joint type SMAW welding connection of SS400 steel material using liquid penetrant and ultrasonic test methods. 7(1), 4–8.
Hakimian, S., Bouzid, A., & Hof, L. A. (2024). International Journal of Pressure Vessels and Piping Effect of gasket material on flange face corrosion. International Journal of Pressure Vessels and Piping, 209(October 2023), 105207. https://doi.org/10.1016/j.ijpvp.2024.105207
Hamdani, Fakhriz, 2019. (2019). Jurnal Rekayasa Material , Manufaktur dan Energi FT-UMSU Jurnal Rekayasa Material , Manufaktur dan Energi FT-UMSU. 2(1), 1–9.
Herman, M. & R. (2023). Herman, Meylia & Rivaldo.
Hidayat, M. W., & Negoro, Y. P. (2024). EVALUASI KECACATAN PRODUK PIPA BAJA HOLLOW MELALUI PENDEKATAN STATISTICAL PROCESS CONTROL ( SPC ) DAN FMEA DI CV . PERJUANGAN STEEL EVALUATION OF HOLLOW STEEL PIPE PRODUCT DEFECTS THROUGH STATISTICAL PROCESS CONTROL ( SPC ) AND FMEA APPROACHES AT CV . PERJUANGAN STEEL. 7, 2087–2095.
Hidayat, S. T., Cahyo, T. D., & Saputra, R. S. (2024). PARAMETER. 05(02), 85–92.
Hisyam, A. N., & Jakarta, U. N. (2026). Current Variation Effect on Hardness and Corrosion Resistance of Formed Weld Layer. 11(1), 29–36.
Huda, F. L., & Khoiroh, S. M. (2025). Analisa Pengendalian Kualitas Produk Pipa Besi pada CV . XYZ dengan Metode Statistical Quality Control ( SQC ). 12(1), 498–508.
Indonesia, P. T. M. (2023). Industri Kreatif. 3(2), 1–10. https://doi.org/10.36352/jik.v3i2
Khoiri, H. A., & Aryani, W. H. (2025). Analisis Pengendalian Kualitas Pada Proses Coating di PT ABC dengan Pendekatan Statistical Quality Control ( SQC ) dan FMEA. 05(02), 83–96.
Mei, N., Setiadi, R., Zaqi, A., & Faritsy, A. (2024). Pengukuran Kualitas Produk EQ Spacing Dengan Metode Statistic Quality Control ( SQC ) Dan Fault Tree Analysis ( FTA ) Di PT Sinar Semesta produk salah satunya adalah Statistical Quality Control ( SQC ) dan Fault Tree Analysis ( FTA ). Pengambilan keputusan dalam Statistical Quality Control dapat menggunakan alat yang dikenal dengan seven tools , yang terdiri dari : Cause And Effect ( Fishbone ) Diagram , Control Chart ( Grafik Pengendali ), Check Sheet , Pareto Diagram , Scatter Plot , Dan proses pengumpulan Diagram batang data untuk suatu tujuan agar data dapat disajikan secara komunikatif , agar dapat diubah menjadi sebuah informasi . 2(2).
Pandapotan, U., & Mulyadi, M. (2024). Pengaruh Media Pendingin terhadap Porositas dan Kekuatan Tarik menggunakan Pengelasan SMAW DCSP pada Material Pipa Baja Karbon SCH40. 3, 1–8.
Paul, S. (2023). applied sciences Effect of Damage on the Corrosion Performance of Thermal Spray Aluminium ( TSA ) Coating in Synthetic Seawater.
R Puji & J Supono. (2020). ANALISIS PENGENDALIAN KUALITAS PRODUK MENGGUNAKAN METODE STATISTICAL QUALITY CONTROL ( SQC ) PADA DIVISI CURING PLANT D PT . GAJAH TUNGGAL , Tbk. 9(1).
Ramadayanti, N., & Suryadi, A. (2024). Welding Quality Control Using The Sqc ( Statistical Quality Control ) Method In An Effort To Minimize The Occurrence Of Rejects At Pt . XYZ. December, 43–55.
Susilo, T., Adi, F. T., & Karimun, U. (2025). PENAMBAHAN SUHU PREHEAT DALAM PROSES WELD REPAIR PADA MATERIAL BAJA KARBON API 2W GRADE 50 DITINJAU DARI CACAT LAS DAN KEKERASAN tertentu untuk menyatukan dua atau lebih bahan dengan cara melelehkan dan las , sementara meningkatkan ketangguhan las . Oleh karena itu , penting untuk. 25, 314–334. https://doi.org/10.33556/jstm
Tanaka, S., Thin, T., Okada, H., Gouda, T., & Tonbe, Y. (2024). International Journal of Pressure Vessels and Piping A benchmark elastic – plastic finite element analysis of plate with a surface crack under tensile load for the development of the reference stress method. International Journal of Pressure Vessels and Piping, 209(October 2023), 105182. https://doi.org/10.1016/j.ijpvp.2024.105182
Wahyudi, M., & Ismail, R. (2026). Comparative Characterization of Indonesian AISI 316L Stainless Steel and Commercial Femoral Stem for Artificial Hip Joint Applications. 11(1), 65–77.
Yasmin, D. S., Paundra, F., Pujiyulianto, E., Industri, F. T., Sumatera, I. T., & Selatan, L. (2025). EFFECT OF WELDING CURRENT ON LOW CARBON STEEL CHARACTERISTICS IN SMAW. 25(1), 1–7.
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