Analysis of SMAW Welding On Three-Layer Polyethylene Carbon Steel for Liquid Petroleum Gas Pipeline

Abstract

This research presents a comprehensive analysis of Shielded Metal Arc Welding applied to Three-Layer Polyethylene coated carbon steel pipes utilized in Liquefied Petroleum Gas distribution systems. Given the critical role of LPG piping in ensuring safe and efficient energy transport, the research underscores the necessity for stringent adherence to welding standards and practices. The methodology encompasses three key phases: preparation, execution, and testing, which collectively ensure the integrity and safety of welded joints. The preparation phase involved selecting API 5L carbon steel pipes and establishing a controlled welding environment, while the execution phase focused on employing SMAW with precise welding parameters. Following the welding process, a series of non-destructive testing methods, including visual inspections and radiographic testing, were employed to evaluate weld quality. Results indicate that while the welding process generally met established standards, certain defects were identified, emphasizing the importance of meticulous execution and the need for corrective measures. This study highlights the critical interplay between welding techniques, material integrity, and inspection methodologies, advocating for continuous improvement in practices to enhance the safety and reliability of LPG distribution systems. The findings contribute to the broader discourse on pipeline integrity management and the implementation of advanced corrosion protection strategies, ultimately supporting the sustainability of energy infrastructure.