Studi Pembuatan Procedure Qualification Record untuk Repair through Thickness pada S355 KT0
Abstract
This research aims to develop a Procedure Qualification Record (PQR) for Repair Through Thickness on S355 KT0 material using the GTAW method for the root, SAW for filler and capping. The welds were repaired using gouging and grinding before undergoing repair welding with the SMAW method. The study employed experimental methods with Non-Destructive and Destructive tests following AWS D1.1 and Client Specification MHK-COMP-SPE standards. The test results indicate defect-free welds that meet AWS D1.1 standards in terms of mechanical properties such as tensile strength, bending, impact, and hardness. The tensile strength values reached 609 MPa (longitudinal specimen) and 539 MPa and 540 MPa for transverse specimens. The lowest impact test value was 139J in the fusion line +2 mm repair to original welds area. The peak hardness test value was 240 VHN in the HAZ (repair to original weld) region. The test results were also used to formulate a PQR that aligns with specific requirements. This research is expected to provide guidance for performing repair welding on S355 KT0 material.
References
[2] M. Natschlager, R. Egger, and S.A. Kapl, “Thermomechanically Rolled Heavy Plates for Penstocks,” Thermomechanisch gewalzte Grobbleche für Druckrohrleitungen, WasserWirtschaft, 2018.
[3] J. Brozda, M. Zeman, and M. Lomozik, “The weldability of thermomechanically rolled S460ML steel,” Welding international, vol. 14, pp. 593–605, 2000.
[4] E. Pashinska, V. Varyukhin, A. Zavdoveev, and V. Stolyarov, “Effect of rolling with shear technology on structure, properties and plasticity of low-carbon steel,” International Conference Technology. Plastic. ICTP 10th, 2011.
[5] P Nitheesh Kumar et al, “Repair of through thickness corrosion/leaking defects in corroded pipelines using Fiber Reinforced Polymer overwrap,” IOP Conf Ser Mater Sci Eng, no. 346(1):012016, Apr. 2018.
[6] Ethan Bale, “Practice Case 4 – PQR With Dissimilar Thickness.” Accessed: Jan. 18, 2024. [Online]. Available: https://mewelding.com/pqr-with-dissimilar-thickness/
[7] Douglas Serrati, Douglas Bezerra de Araújo, and Louriel Vilarinho, “Thermal-Structural Plasma Gouging Simulation for Welding Repair,” Soldagem & Inspeção, vol. 28 (1), no. ISSN 0104-9224, Nov. 2023.
[8] M. Zeinoddini, S. Arnavaz, A. P. Zandi, and Y. A. Vaghasloo, “Repair welding influence on offshore pipelines residual stress fields: An experimental study,” J Constr Steel Res, vol. 86, pp. 31–41, Jul. 2013, doi: 10.1016/J.JCSR.2013.03.010.
[9] Piotr Swacha and Adam Lipski, “Cracking of S355J2+N steel in the high-cycle and very-high-cycle fatigue regimes,” Int J Fatigue, vol. 168, no. 107388, Mar. 2023.
[10] Anatoliy Zavdoveev et al., “Effect of heat treatment on the mechanical properties and microstructure of HSLA steels processed by various technologies,” materialstoday communications, vol. 28, no. 102598, Sep. 2021.
[11] Lei Cui, Xinqi Yang, Dongpo Wang, Xiaopeng Hou, Jun Cao, and Wei Xu, “Friction taper plug welding for S355 steel in underwater wet conditions: Welding performance, microstructures and mechanical properties,” Materials Science and Engineering: A, vol. 611, pp. 15–28, Aug. 2014.
[12] Standard test method for macroetching metals and alloys, “ASTM International,” in ASTM, E 340-00., 2006.
[13] AWS D1.1/D1.1M:2020, Structural Welding Code—Steel, 24th ed. American Welding Society, Miami, FL, 2020.
