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All Journal Journal of Materials Exploration and Findings Recent in Engineering Science and Technology
Mudaryoto, Johny Wahyuadi
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Wire Rope Sling Failure Analysis: Technical Root Causes, Investigation Methodology Critique, and Lessons for Lifting Safety and Organizational Learning Zaky, Ahmad; Pratesa, Yudha; Mudaryoto, Johny Wahyuadi
Recent in Engineering Science and Technology Vol. 3 No. 03 (2025): RiESTech Volume 03 No. 03 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i3.111

Abstract

Wire rope slings are critical in heavy lifting operations, yet their failure remains a persistent safety concern. This paper presents a case study of a catastrophic sling rupture that occurred during a heavy lifting trial, despite the lift being within its rated capacity. A multi-faceted failure analysis identified hidden corrosion fatigue at the sling’s ferrule and an unanticipated extreme overload condition as the primary technical root causes. Procedural and organizational factors—including inadequate risk assessment, deviation from critical lift protocols, and failure to act on prior lessons—also contributed to the incident. The contractor’s investigation is critically reviewed against best-practice Root Cause Analysis guidelines, highlighting both strengths and gaps in its methodology. Key lessons to improve lifting safety are discussed, such as implementing rigorous inspection and retirement criteria for aging slings and ensuring comprehensive lift planning. Overall, the case underscores the importance of robust investigation practices and effective organizational learning to prevent similar failures in the future.
Effect of Alkyd and Polyester Resin Compositions on Corrosion Resistance, Blistering, and Adhesion in utilization of Oily Sludge as Anti-rust Coating Material Kakalang, Gerets Land; Kristianto, Yohanes David; Mudaryoto, Johny Wahyuadi
Journal of Materials Exploration and Findings Vol. 3, No. 3
Publisher : UI Scholars Hub

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Abstract

Oil sludge is a waste derived from upstream and downstream activities of the oil and gas industry which is estimated at 10,000 tonnes generated from all PERTAMINA downstream activities spread across various fields, processing units and depots throughout Indonesia. Oil sludge has the same characteristics as asphalt, where asphalt in previous studies can be used as an anti-rust coating, so that the handling of oily sludge can be topped up by reusing and having its own added value. The purpose of this research is to utilise waste oily sludge as an alternative anti-rust coating material and compare alkyd resin and polyester resin on corrosion resistance, adhesion resistance, and pinhole characteristics of anti-rust coating materials. The method used in this research is that the oily sludge added to the forming ingredients for the coating, namely: CaCO3 (Calcium Carbonate), resin (polyester and alkyd), asphalt, wax and additives with a certain composition. The effect of adding 20 g resin will improve the corrosion resistance, blistering, and adhesion. Alkyd resins produce better corrosion and blistering resistance than polyester resins, where there is a 31% decrease in rust width for alkyd resins and 9% for polyester resins. As for adhesion, good results were obtained for both resins. In the pin holes test, pin holes were found to form in both resins. While in the atmospheric exposure test in the Tanjung Priok area, sample G1 was found to have undercutting while samples G5 and G6 formed alligatoring.
Co-Authors Ahmad Zaky, Ahmad Kakalang, Gerets Land Kristianto, Yohanes David Yudha Pratesa