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Jaka Fajar Fatriansyah
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Journal of Materials Exploration and Findings
Published by Universitas Indonesia
ISSN : -     EISSN : 29625475     DOI : https://doi.org/10.7454/jmef
Core Subject :
JMEF publishes publications that report on R&D discoveries and fundamental understanding of phenomena with potential significance, as well as those that explore solutions to current engineering challenges in materials and mechanical engineering or related fields. JMEF includes original research, review and short communication articles. JMEF welcomes original articles on all aspects of materials science/engineering and mechanical engineering, including: 1. Materials synthesis, processing and manufacturing; 2. Advanced Materials; 3. Extraction metallurgy; 4. Physics of Materials; 5. Computational studies on Materials and Mechanical Engineering; 6. Fluid Dynamics and Heat Transfer; 7. Management Integrity and Reliability Engineering; 8. Mechanical systems; and related fields.
Arjuna Subject : -
Articles 68 Documents
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Inspection Program Effectiveness Key Performance Indicator for Pressurized Static Equipment Integrity at Offshore Platform Haekal, Teuku Ahmad; Soedarsono, Johny Wahyuadi; Munir, Badrul; Sholihin, Muhammad Yudi Masduky
Journal of Materials Exploration and Findings Vol. 3, No. 3
Publisher : UI Scholars Hub

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Abstract

One of the key challenges in asset integrity management system at offshore platform is the lack of visibility regarding performance issues and program effectiveness. Without proper performance measurement systems, it becomes difficult to address positive or negative trends promptly and for management to stay informed about the status and the impact of the inspection program. Therefore, Key Performance Indicator (KPI) is needed to measure inspection program effectiveness to prevent undesirable equipment failures that could lead to Loss of Primary Containment (LOPC) or Process Safety Event (PSE). The developed KPI is the ratio of the number of non-leak inspection findings with a remaining life of less than 3 years to the total number of all anomalies with a remaining life of less than 3 years, including leak findings. By applying this KPI, inspection program effectiveness for an offshore field was monitored and improved firmly from 29% in 2018 to 82% in 2023, with some fluctuations in performance before achieving a strong recovery in later years.
A Comparative Study of Conventional and Statistically Active Corrosion Methods for Corrosion Growth Assessment of a 24-inch Gas Pipeline Rinaldi, Rudi; Fatriansyah, Jaka Fajar
Journal of Materials Exploration and Findings Vol. 3, No. 3
Publisher : UI Scholars Hub

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Abstract

Component failures in oil and gas pipelines can have fatal consequences, leading to operational downtimes and environmental damage. Knowledge of the corrosion growth rate is fundamental to pipeline integrity management, as it is essential for risk assessment and decisions related to asset management. This article aimed to compare two approaches for the corrosion growth estimation of the 24-inch offshore gas pipeline: the conventional method versus the Statistically Active Corrosion (SAC) method. This article is based on the in-line inspection (ILI) results of two consecutive assessments from 2020 to 2023 of the entire 73 km of the pipeline. The results show that the SAC method evaluates the corrosion activity on the pipeline with better accuracy and localization than the conventional method, highlighting 782 corrosion active joints in the 5,987 pipeline joints. The SAC method leads to much higher average and maximum corrosion growth rates while also being able to pinpoint active corrosion locations more accurately. Thus, the SAC method is an efficient and simple strategy to cope with corrosion assessment problems regarding pipeline integrity management. It enables the operators to prioritize their maintenance actions, improving pipeline safety.
Comparative Analysis of Risk-Based and Time-Based Inspection Application in Hydrocarbon and Chemical Industries: A Review Azizar, Azizar; Sofyan, Nofrijon
Journal of Materials Exploration and Findings Vol. 3, No. 3
Publisher : UI Scholars Hub

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Abstract

RBI and TBI strategies are comparatively reviewed in terms of their contribution to maintaining asset integrity for asset owners in the hydrocarbon and chemical industries. The objective is to assess various methods on a cost-efficient and risk-managed operational safety basis. It utilizes common industry standards such as API 580 for RBI, and API 510, API 570, and API 653 for TBI, and also case studies and literature analysis. The analysis of data was conducted to examine how each approach deals with inspection planning and decision-making. They suggest that RBI's risk-based prioritization strategy leads to more effective management of high-risk assets, while TBI is simpler and standardized, but could potentially result in over-inspections or overlook emerging risks. The review thus suggests a customized strategy taking account of both RBI and TBI in order to adequately meet requirements related to operational processes, risk exposure, and compliance.
Lifetime Prediction of Pan Feeder Based on 3D Laser Scanning for Wear Assessment Maulidya, Nony; Priadi, Dedi; Asral, D. Rizal
Journal of Materials Exploration and Findings Vol. 3, No. 2
Publisher : UI Scholars Hub

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Abstract

Apron feeder is one of stages in crushing circuit to convey material in short distance. Pan flight is the main component of apron feeder that is severely exposed to wear mechanism due to its direct contact with open cut abrasive ore. With this operating environment of apron feeder, regular maintenance and inspection must be conducted to assess wear rate of pan’s surface to maintain equipment availability and provide information and sign before the equipment undergoes severe and sudden degradation. 3D laser scanning is method used in this study as Non-Destructive Testing (NDT) based inspection. The aim of using 3D scanning is to model the actual condition of pan and give measurement of wear. Later this scanning data is analyzed for forecasting life prediction of when pan surface reaches its safe minimum thickness. Utilizing 3D scanning for wear measurement offers comprehensive analysis, precise measurements with visualization capabilities and handling geometries effectively. Life prediction derived from this analysis can be used as decision making to determine next replacement date of pan feeder using regression model and linear calculation. Results after four times conducting this inspection with four months period consistently, showing that the safe replacement time will be on the earliest second trimester of 2024. This provides an advantage on the shutdown planning side to prepare resources and timetable early and effectively.
Ultimate Limit State Reliability-Based Approach Life Prediction of an Existing Frame Structure Under Seismic Hazard in Indonesia Herucakra, Wira; Adnyani, Luh Putri
Journal of Materials Exploration and Findings Vol. 4, No. 1
Publisher : UI Scholars Hub

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Abstract

Life assessment integrated with Structural Integrity Management (SIM) has been implemented in the oil and gas industry for the past decade to maintain the integrity and safety of an in-service structure used to support hydrocarbon exploration, production, and processing activity. Current structural life assessment, as ruled by the American Petroleum Institute (API), uses a fatigue-based approach for offshore structures subjected to wave loading. As the general principle of SIM is not limited to offshore structures, this study offers an alternative life assessment method for onshore structures, especially steel frame structures subjected to earthquake loads. Reliability analysis, combined with the effect of the time-related degradation mechanism of steel structure due to corrosion and mechanical damage, with non-linear structural analysis, produces comprehensive ultimate limit state behaviour and performance of an existing structure. A steel frame structure located in Indonesia was evaluated in this study, with the reference base shear developed based on the latest Indonesian Seismic Provision SNI 1726-2019; the life of the structure was estimated by determining the time interval required for the overstrength factor produced from the pushover analysis to approximate 1.0. The assessment demonstrated that the life of the existing structure exceeds its design life and is safe for operation.
Design of a 10-Ton Capacity Solar-Powered Cold Storage at the Cituis Fish Auction Site, Tangerang, Banten, Indonesia Wardi, Wardi; Budiyanto, Muhammad Arif
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

This study presents the design of a 10-ton capacity solar-powered cold storage system for the Cituis Fish Auction Site (TPI) in Tangerang, Indonesia, as a sustainable solution to support the coastal fisheries sector. The system comprises two temperature zones: an anteroom at 5°C and a freezer room at -30°C, both integrated with a hybrid system utilizing solar panels and batteries. The total power consumption of the cooling system reaches 27.51 kW. The simulation results, obtained using HOMER Pro software, indicate that the hybrid PV system can reduce CO2 emissions by up to 16,754 kg per year. From an economic perspective, the system shows high feasibility with a payback period of only 0.41 years, a capital expenditure (CAPEX) of IDR 745.29 million, and a monthly operational cost (OPEX) of IDR 9.7 million. These findings confirm that the system is both technically and economically viable and can be replicated in other coastal regions.
A Study of Wear Measurement and Life Prediction of Insert Chute Liner on Gold Ore Processing Natanael, Ferry Ardika; Maulidya, Nony; Priadi, Dedi
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Chutes are critical materials handling assets to transport solid particles from one process step to another in mineral processing, coal mining and cement industries. The material transport, because of material characteristics, cause severe wear on internal lining of chutes or bins’ structure. The wear problem on internal lining of bins or chutes needs to be checked to keep production efficiency. Therefore, not checked wear rate causes liner replacement schedule becomes unpredictable. It leads to production loss and highly cost maintenance in industry. This study shows that condition-based maintenance through regular thickness measurement using Ultrasonic Transducer (UT) to predict life service of critical liners prevent unplanned maintenance schedule. Data collected can be used to predict the next liner replacement schedule, cuts unplanned maintenance and breakdowns.
Correlation between Microstructure and Hardfacing Properties with Welding Current Intensity in Reconditioned Low-alloy Steel Material using Submerged Arc Welding (SAW) : A Comprehensive Review asmara, iman Nugraha; Winarto, Winarto
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

This review studying the correlation between microstructural transformations and mechanical properties in reconditioned low-allow steel material, focusing on the impact of Submerged Arc Welding (SAW) parameters, especially current, on microstructure . The study highlights how variation on welding parameters, especially current intensity variation, affecting microstructural transformations, hardness, and wear resistance of hardfaced layers. Key aspects such as dilution effect, phases distribution, and carbide formation are reviewed to understanding their impact on mechanical properties. By reviewing insights from existing literature and experimental findings, this review underscores the role of Submerged Arc Welding in enhancing mechanical properties and microstructural of low-alloy steel material.
Techno-Enviro-Economic Approach for Electrification of Rural and Shrimp Farming Regional Development of An Isolated Island in Indonesia by Utilizing Hybrid Renewable Energy Systems Wijaya, Fiqih Akbar; Indianto, Mohammad Akita
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

One of the challenges in developing and archipelagic countries such as Indonesia is maintaining energy demand in rural and isolated areas due to difficulties in electrical distribution. For instance, in areas like Bawean Island, no additional electricity capacity has been introduced in the past year, leading to an unmet potential customer demand. One of the possible options is by utilizing Hybrid Renewable Energy Systems (HRES) that are integrated with existing fossil fuel-based energy systems to support the growing energy demand in the remote island. A case study in Bawean Island is conducted with the projected energy demand covers the energy consumption for rural electricity and development for business and industry, in this case shrimp pond agriculture industry. The energy demand is projected until 2035 with increase needs for industry is an average of 5% to 7%. A techno-enviro-economic analysis utilizing Homer Pro software is conducted to determine the optimal configuration of energy systems. Three scenarios with different configurations of solar PV, wind turbines and existing fossil fuel-based grids are simulated. In scenarios I, II, and III, annual CO2 emissions are 33.6%, 37.16%, and 47.3% lower than in the Grid system. The technical and economic research shows that Scenario I, with a 10.5 MW grid configuration and 17.25 MW photovoltaic capacity system on 26.91 hectares of land, is the optimal implementation priority. Scenario I has the lowest LCOE (0,1580 $/kWh), highest NPV ($7.910.714), and shortest payback period (9 years 7 months). This indicates the potential to enhance productive sectors, particularly shrimp ponds.
Fire and Explosion Hazard Risk Analysis of Fuel Transfer Activities at Fuel Terminal “X” Utilizing the Quantitative Risk Analysis (QRA) Method Sulistyawan, Angga Wahyu; Yuliusman, Yuliusman
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Fuel transfer operations at Fuel Terminal ‘X’ constitute a critical stage in the energy supply chain, where complex interactions among human, technical, and environmental factors generate inherent risks of fire and explosion. The flammable nature of fuel oil, coupled with the possibility of vapor or liquid releases outcoming by tool failures, connection leaks, or control system malfunctions, underscores the need for robust and proactive risk management strategies. This study aims to evaluate and mitigate these risks by applying Quantitative Risk Assessment (QRA). The assessment utilized the Parts Count method to foercast generic component failure rates and Fault Tree Analysis (FTA) to classify potential failure pathways that could head to hazardous fuel release scenarios. Consequences were modeled with SAFETI software, enabling a detailed examination of thermal radiation spread by fires, overpressures by blasts, and the determination of risk exposure zones for human populations in the vicinity. Further application of control systems like gas leak detectors, flame detectors, and the automatic/manual shutdown and isolation systems reduced the IRPA to an acceptable risk level. These findings emphasize the importance of combining quantitative risk modelling and systematic safety barriers to improve the operational safety. It is anticipated that these results will support the preparation of risk assessment protocols and safety policy guidelines for fuel handling facilities in the oil and gas sector.

Page 6 of 7 | Total Record : 68

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