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Wall and Piles for Hydroocarbon Pipes in Soft Soil in Slope Areas Mutadi Mutadi; Pratikso Pratikso; Abdul Rochim
Budapest International Research and Critics Institute (BIRCI-Journal): Humanities and Social Sciences Vol 4, No 4 (2021): Budapest International Research and Critics Institute November
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v4i4.2986

Pipes laying on an unstable slope of soft soil are prone to movement. Pipelines that are buried in unstable slope areas will move due to lateral loads from soil movement which can cause damage to the pipeline. A laboratory small-scale model of the reinforcement system of piles supported retaining walls was conducted to investigate the effect of lateral load on the reinforcement. In this experiment, the lateral forces of 0.3 kN, 0.35 kN, and 0.4 kN and vertical force of 0.05 kN, 0.1 kN, and 0.15 kN were used. Lateral load from electric jack is equipped with load cell and vertical load used cement- steel box. To validate the experimental result, a finite element program was used. The experimental results showed that an increase in lateral loading, increased the displacement of the reinforcement system. For a Vertical Load 0.05 kN and versus a lateral load of 0.3 kN causes a horizontal displacement of 0.34 mm and an increased of 2.94 % for loading of 0.35 kN and an increased of 8.82% for loading 0.4 kN. The pattern is the same in the finite element method analysis, where there was a 2.3 8% increased for 0.35 kN loading and an increased to 33.33 % for 0.4 kN loading. In the same Load, the Reinforcement System is reliable as shown in Safety Factor on dry condition were 3,33, 2,828 and 2,476, and on wet condition were 2,99, 2,524 and 2,237.

HEAVY LIFTING FOR OF E-HOUSE MUDULE 245 T, USING CRAWLER CRANE 1250 T Mutadi, Mutadi
Mestro: Jurnal Teknik Mesin dan Elektro Vol 5 No 02 (2023): Edisi Desember
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v5i02.467

Abstract. Heavy lifting on an E-House Module 245 T is using Crawler Crane 1250 T with single lifting while moving on the soft soil ground is most riski and prone to the setllement. The heavy module that are lifted in unstable ground bearing areas will move due to the settlement from soil which can cause damage to module. A site activity of the lifting plan of the module used Crawler Crane 1250 T was conducted to investigate the effect of radius operation and COG Centre of Gravity to be considered for the lifting plan. In this result the rigging sling get safety factor as the lowest it is 1.06, the crawler crane get safety factor is 1.22 and the ground bearing safety factor is 1.53. The load from E-House Module get from the weigingb report is 245 T with the COG XCG 7860 mm , YCG 437 mm and ZCG 5840mm, the module dimension is 18200 mm x and 9000 mm y and 16400 mm z.

MOORING LINE PRE-LAY AND INSTALLATION PROCEDURE Mutadi, Mutadi
Mestro: Jurnal Teknik Mesin dan Elektro Vol 5 No 02 (2023): Edisi Desember
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v5i02.468

Abstract. Mooring Line Pre -Lay and Installation Procedure is using AHTS with the power engine 30.000 BHP and has capacity of bollard pull 300 ton is used for mooring line installation for FPSO Marlin Natuna. The Mooring Installation often fail due to the anchor drag during testing. In this site activity the anchor drag is used. The type of anchor drage is strevpris MK6 with the weight 15 ton and after installation it should be test loaded 243 ton, it is 80% from his capacity 304 ton. The Acceptance criteria for the mooring installation is the anchor can not allow drage out of the target box, with allowable drage 13-16 m, during tension test with 30 minute the holding time. The result from the site activity of the mooring line installation as follow ; the tension mooring line number 1,2,3,4,5,6,7,8 are pass with the tension test 250 ton, and the final position of all anchor within in the target box eith the maximum drag 2m.

A literature review of flexibility in interactive mathematics classrooms: the role of teachers and students Munaji, Munaji; Rohaeti, Titi; Mutadi, Mutadi; Sumliyah, Sumliyah; Kodirun, Kodirun
Journal of Education and Learning (EduLearn) Vol 19, No 2: May 2025
Publisher : Intelektual Pustaka Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/edulearn.v19i2.21501

The significance of flexibility in mathematics classrooms, particularly in interactive mathematics classrooms where students learn through hands-on experience, cannot be overstated. Teachers play a pivotal role in fostering students’ mathematical understanding by selecting appropriate tasks and providing expert guidance. Additionally, the patterns of interactions between teachers and students, such as elicitation and discussion patterns, and their relationship with teacher flexibility are examined. Developing adaptive expertise in mathematics involves the ability to think flexibly about mathematical concepts, which can be enhanced by teaching math in a way that promotes the development of expertise. Mathematical flexibility, a crucial aspect of mathematical competence, involves the creative and innovative use of mathematical concepts, numerical relations, and strategies. It requires a combination of procedural and conceptual knowledge, skills, and understanding, as well as motivational and affective dispositions. Pedagogical flexibility can significantly contribute to innovating classroom teaching and learning, and exploring the relationships between teachers’ pedagogical flexibility and students’ potential and actual mathematical flexibility development. The article also emphasizes the importance of developing adaptive competencies in mathematics education to prepare students for an uncertain future, with creativity being considered a key competency and flexibility being viewed as a vital element of creativity.

INSPECTION OF THE ADEQUACY OF CLOSED-DRAIN AND OPEN-DRAIN SYSTEMS USING HYDRAULIC ANALYSIS FOR AGING OFFSHORE PLATFORMS mutadi, mutadi
International Journal of Marine Engineering Innovation and Research Vol 10, No 2 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i2.22757

Aging offshore platforms require a reliable drainage system to ensure safety and operational efficiency. This study aims to analyze the adequacy of the closed drain and open drain systems on a 24-year-old offshore platform that is scheduled for redevelopment. The methodology employed involves hydraulic analysis, considering fluid production rates and drainage system design data based on API 14E and GPSA (2004) standards. The collected data included channel cross-section dimensions, flow rates, and fluid characteristics to calculate the system's capacity. The analysis showed that the 4-inch header pipe was adequate to accommodate a closed drain flow rate of 167.4 BPD and an open drain flow rate of 1.63 BPD. The Slop Tank (Platform X-T-26), with a geometric volume of 54 ft3, was also adequate to contain the maximum drainage volume of 15.23 ft3 from the Vertical Test Separator. This study also identified several critical points that require periodic monitoring to prevent blockages and performance degradation. This study emphasizes the importance of periodic inspections to assess the adequacy of drainage systems on aging offshore platforms to ensure safety and operational efficiency after redevelopment. It also provides preventive maintenance recommendations to extend the system's lifespan.

Pemikiran Ekonomi Islam Tentang Konsep Produksi Mutadi, Mutadi; Jaelani, Aan; Wartoyo, Wartoyo
Journal of Accounting and Finance Management Vol. 6 No. 5 (2025): Journal of Accounting and Finance Management (November - December 2025)
Publisher : DINASTI RESEARCH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jafm.v6i5.2588

Pemikiran ekonomi Islam pada konsep produksi untuk mengimbangi pemikiran ekonomi produksi konvensional yang mana dalam ekonomi Islam memandang ekonomi berada di tengah dan memperjuangkan keseimbangan yang adil di semua bidang ekonomi, termasuk keseimbangan antara bisnis dan modal, sehingga menghasilkan output yang seimbang antara pemilik pabrik dan pekerja serta output produk yang halalan toyibah dan berkah untuk konsumen, dan pemilik perusahaan serta memberikan dampak manfat untuk kelompok sosial. Metode penelitian dalam penelitian ini menggunakan metode kwalitatif dengan riset pada jurnal sebelumnya dengan meneliti road map dari hasil karya yang sudah ekisis. Hasil Penelitian bahwa konsep produksi secara Islam dengan system bagi hasil dan membayar upah pekerja sebelum kering keringatnya, menghasilkan produk yang halalan toyibah dan berkah serta menguntungkan. Penegasan ini dapat diterima jika perilaku prinsip Islam ini dikerjakan dengan komprehensip, terhadap sarana, prasarana, peralatan produksi, bahan produksi yang halal dan metode konsep produksi secara syari’, konsep distribusi dan konsumsi secara Islam, maka menghasilkan barang produksi yang bermanfaat dan berkeadilan dan seimbang.

Fire Protection Philosophy Mutadi; Munaji
Journal of Emerging Innovations in Engineering Vol. 1 No. 01 (2025): June 2025
Publisher : PT Pustaka Intelektual Sutajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Lashing for cargo securing transportation onshore is to secure the heavy module Structure during transported by using trailer TRAILER Self Propelled Module Transporter is safely. The analysis of lashing should consider for the transverse force in turning condition, Longitodinal force in breaking and acceleration condition. The weight of Structure is 25.774 mt metric tonwill transported by TRAILER with 4 axle, has speed 0.5 km/h and acceleration 0.07 m/s2, time taken to accelerate is 2 s. The environment condition is the wind speed is 10 m/s. The capacity of lashing is 0,5 5 mt. The result from the site activity of the transportation of Module Structure with using TRAILER is succsessfuly and safely. The module Structure has the total transverse securing force 2.49 mt greater than total transverse sliding force 0,63 mt, the longitudinal securing force 2.49 mt is greater than total longitudinal sliding force 0.53 mt. The module Structure has the totals longitudinal force is 2.49 mt greater than total longitudina sliding force 0.48 mt. .

Comprehensive Integrity Assessment Framework for Ageing Offshore Platforms in Tropical Marine Environments: An Integrated Approach Combining SHM, Probabilistic Analysis, and Digital Twin Technology Mutadi, Mutadi
Budapest International Research and Critics Institute-Journal (BIRCI-Journal) Vol 8, No 4 (2025): Budapest International Research and Critics Institute November
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v8i4.8148

This comprehensive study presents an advanced integrated framework for assessing the structural integrity of ageing offshore platforms operating in tropical marine environments. The framework synergistically combines stateoftheart Structural Health Monitoring (SHM) systems, contemporary metocean data analysis, sophisticated probabilistic reliability assessment methodologies, and cuttingedge digital twin implementation. Over an extensive 18month monitoring period conducted on a representative ageing offshore platform, critical findings emerged: contemporary environmental loads exceeded original design specifications by 1525%, splash zone corrosion rates reached 0.32 mm/year (approximately 160% of design assumptions), and reliability indices for ultimate strength under operating conditions ranged between 2.62.9, below the ISO 19902 target of 3.0. The implemented digital twin system demonstrated exceptional performance with 94% accuracy in stress prediction during extreme weather events and enabled realtime visualization of structural behavior. This research provides a scientifically rigorous, datadriven foundation for life extension decisions and optimized maintenance strategies for ageing offshore infrastructure in tropical regions, representing a significant advancement over conventional assessment methodologies.

Inspection of Adequacy of Closed-Drain and Open-Drain Systems Using Hydraulic Analysis for Aging Offshore Platforms Mutadi
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 2 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i2.6389

Aging offshore platforms require a reliable drainage system to ensure safety and operational efficiency. This study aims to analyze the adequacy of the closed drain and open drain systems on a 24-year-old offshore platform that is scheduled for redevelopment. The methodology employed involves hydraulic analysis, considering fluid production rates and drainage system design data based on API 14E and GPSA (2004) standards. The collected data included channel cross-section dimensions, flow rates, and fluid characteristics to calculate the system's capacity. The analysis showed that the 4-inch header pipe was adequate to accommodate a closed drain flow rate of 167.4 BPD and an open drain flow rate of 1.63 BPD. The Slop Tank (Platform X-T-26), with a geometric volume of 54 ft3, was also adequate to contain the maximum drainage volume of 15.23 ft3 from the Vertical Test Separator. This study also identified several critical points that require periodic monitoring to prevent blockages and performance degradation. This study emphasizes the importance of periodic inspections to assess the adequacy of drainage systems on aging offshore platforms to ensure safety and operational efficiency after redevelopment. It also provides preventive maintenance recommendations to extend the system's lifespan.

Piping Stress Analysis of XYZ Platform Using CAESAR II: Compliance Verification with ASME B31.3 Mutadi Mutadi; Munaji Munaji
Mestro: Jurnal Teknik Mesin dan Elektro Vol 8 No 01 (2026): Edisi Juni (In Progres)
Publisher : Fakultas Teknik Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/mestro.v8i01.819

This paper presents the piping stress analysis of the XYZPlatform as part of the EPCI Contract for Platform Reactivation of the XYZ Project, operated by PT. XYZ. The analysis was conducted using CAESAR II Version 2019 (11.0) for piping system Model 03, covering the pipeline from Pig Receiver (R-002) to Upstream HIPPS (Z-010). The objective was to verify compliance with ASME B31.3 (2020) Process Piping code under various load cases including hydrotest, sustained, operating, occasional, and expansion conditions. Line properties analyzed involve 8-inch and 10-inch carbon steel pipes (A106 Grade B and API 5L X52) with design pressure up to 1,550 psi and design temperature of 200°F. Results demonstrate that all maximum stresses are within allowable limits, with sustained stress ratio reaching 60.8%, occasional stress ratio at 61.2%, and thermal expansion ratio at 23.0%. Maximum displacement in the operating condition is 9.013 mm in the X-axis direction, well within the 100 mm threshold. Flange leakage verification using the Pressure Equivalent Method yields a maximum ratio of 77.72%, confirming integrity. The minimum natural frequency of the piping system is 4.585 Hz, exceeding the required 4 Hz minimum. All equipment nozzle loads at the Pig Receiver are within allowable limits per CPY-SPE-0009. The study confirms that the proposed piping configuration for XYZPlatform is structurally sound and compliant with applicable codes and project specifications. Keywords: ASME B31.3; CAESAR II; XYZPlatform; XYZ Platform; Offshore Piping; Piping Stress Analysis

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