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Freespan Analysis for Subsea Pipeline Integrity Management Strategy Hadi, Nurul; Helmi, Muhammad; Cathaputra, Edo; Priadi, Dedi; Dhaneswara, Donanta
Journal of Materials Exploration and Findings Vol. 1, No. 3
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Abstract. Over a rough seabed or on seabed subject to scour, freespans can occur when contact between a subsea pipeline and the seabed is lost over an acceptable distance. When this exceeds the allowable freespan length, design stresses can be exceeded, and a vortex induced vibration (VIV) response can be initiated, resulting in the risk of fatigue failure. If this is not predicted and controlled properly, it will affect pipeline integrity, leading to expensive rectification and intervention work. Freespan analysis consisted primarily of a screening check in which the as-found freespans from Remotely Operated Vehicle (ROV) or multibeam Side Scan Sonar (SSS) inspection survey were compared against the design allowable lengths and determine the expected fatigue life of a freespan that may be experiencing Vortex Induced Vibration (VIV). Freespans are considered acceptable if the calculated fatigue life exceeds the design life criteria. This paper describes the freespan analysis that has been developed to perform detailed freespan engineering assessments, incorporating the latest survey and as-laid conditions. This analysis follows a methodology in standard code DNVGL RP F105 that has been accepted and used by operators to produce more accurate and less conservative freespan analysis results, leading to a subsea pipeline integrity management strategy with fewer unnecessary interventions and greater cost benefits.
The Effect of Current Density and Hard Chrome Coating Duration on the Mechanical and Tribological Properties of AISI D2 Steel Hasanah, Indah Uswatun; Priadi, Dedi; Dhaneswara, Donanta
Journal of Materials Exploration and Findings Vol. 2, No. 2
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The effect of hard chromium coating on AISI D2's mechanical properties and wear resistance has been investigated using the electrolysis technique with varying current and coating duration. The variations of current used are 0.8 A, 1.2 A, and 1.6 A, while the coating duration used are 300, 600 and 900 seconds. Characterization of the films was conducted using SEM-EDS, and XRD. It can be observed from SEM characterization that the chrome grains resulted from the electroplating process are fine. The XRD identify chrome compund on the surface coating. The highest hardness value was 520.6 HV on a sample with a current of 1.6 A and a coating duration of 900 seconds and the lowest wear value was 2.85x10-6 mm3/mm on a sample with a current of 1.6 A and a coating duration of 900 seconds.
Optimization of AlTi PLD coating by increasing Ti content, N2 and Annealing which used for SKD61 pins in aluminum die casting Kosasih, Rusman; Suliyanti, Maria Margaretha, Prof; Priadi, Dedi; Usni, Wisnu
Journal of Materials Exploration and Findings Vol. 2, No. 2
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The Alumunium Titanium Nitrogen (AlTiN) coating is known as one of the best coating materials for protective coating, while Pulsed Laser Deposition (PLD) is a laser coating process used for electric layer and superconductor applications, producing thin films up to 20 µm in thickness. The combination of these two matters has already been researched and is still in progress. One major challenge in the aluminium casting industry is to minimize the damage caused to tool steel pins made from SKD61, when aluminium material sticks to the pin, and halting production. Therefore, research on effective coatings for tool steels and testing various basic mechanical properties, such as hardness, coating content, roughness, adhesive level, surface image, and microstructure, need to be conducted to address this issue. The research started by creating dummy blocks as samples from SKD61, followed by PVD-PLD with three coating materials, namely Al/Ti (50:50), Al/Ti (40:60), and Al/Ti (30:70). The PLD utilized an Nd:YAG laser with a 1064 nm wavelength, and a vacuum condition with 99.5% High Purity N2 gas, concluding with the annealing process. Several sample tests were conducted to assess the effectiveness of the coatings, including FESEM, SEM, EDS, surface roughness, VDI, and micro-hardness, which were analyzed at the BRIN Physics Research Center and PT XYZ Laboratory. The results indicated that the thin layer deposition improved mechanical properties. The coatings showed an amorphous Al-Ti-N morphology, with surface hardness ranging from 333-384 mHv (without annealing) and 410-455 mHv (with annealing). The roughness increased from 0.198-0.247 Rz (without annealing) to 0.318-0.916 Rz (with annealing). The coatings were ranked in ascending order of hardness as AlTi 40:60, AlTi 50:50, and AlTi 30:70. These findings provide valuable insights for further research, including exploring substrate heat treatment, fixture rotation, and casting effects.
Study on Human Integrity Management System Maturity Level for Supporting Asset Integrity and Process Safety Implementation Sihotang, Anggiat M; Priadi, Dedi; Asral, D. Rizal
Journal of Materials Exploration and Findings Vol. 3, No. 1
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The human factors (HF) are recognized as one of critical process safety barriers involved in normal and abnormal conditions in the oil and gas industry. In order to strengthen the HF roles as barriers we need to ensure that the actions generated are based on a valid risk assessment of the operation to be addressed by a relevant human factor analysis. Organizations within the oil and gas process have made much progress in understanding and implementing HF improvement programs. However, organizations are not always clear about what are their current situations in managing HF, their priorities for HF to be improved or where they should focus in their future plans. The objectives of this paper are to develop and propose a model called the human integrity management system (HIMS) model and the way its maturity level (HIMS-ML) is measured in managing HF related to asset integrity (AI) and process safety (PS) implementation. It nowadays becomes something urgent to be implemented but also, importantly, to identify where future efforts and strategy need to be set-up used as basis for improving HF. The proposed HIMS model introduces 5-level scale to determine the level of maturity and includes 20 key elements mainly generated from Bow-Ties model and mapping alignment with the CCPS-risk based inspection process safety (CCPS-RBPS) where 46 expectations are developed to reflect key HF issues within the process safety management system to prevent and mitigate the major accident hazard (MAH) event. This paper describes the model and the method of assessment, illustrating its use with a case study in the 3 big oil and gas operators in Indonesia. Spider chart is used to reflect the results of the maturity assessment obtained based on the response given by the relevant key persons in the organization. It can be concluded that the proposed model appears to be an effective and useful tool to measure the maturity of HF management implementation in AI and PS operation, identify the gaps and propose improvement plans.
Development of Dynamic Risk-Based Inspection Using Forward Difference Approach for Pipe Failure Due to Uniform Corrosion Fatriansyah, Jaka Fajar; Nurullia, Zahra Nadia; Federico, Andreas; Priadi, Dedi
Journal of Materials Exploration and Findings Vol. 2, No. 1
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The oil and gas industry is one of the world's largest and most influential energy contributors. All aspects involved in the operation of this industry are fundamental to be reviewed and managed correctly, especially by preventing or minimizing the failures that could occur. Uniform corrosion is the most common component failure mechanism that can cause failure in the oil and gas industry. The company's actions in managing and preventing the risk of this type of failure have a major role in the sustainability of the company due to the possibility of more significant impacts if the risk cannot be handled well, such as high inspection and handling costs, environmental impacts, and threats to work safety. In this study, the Dynamic Risk-Based Inspection (DRBI) method, which is a development of Risk-Based Inspection (RBI), is implemented to handle and analyze risks that are managed in real-time at each inspection period. Risk level analysis was carried out through data processing related to pipe thickness from the risk profile from the inspection results in 5 months using Igor and Rstudio software and calculating corrosion rates using the forward difference approach. Based on the analysis results, five risk levels of pipeline failure at PT. X due to uniform corrosion using DRBI was obtained, consisting of two medium risks and three medium-high risks. In contrast, only one risk level was obtained from the RBI method, namely medium-high. The risk value fluctuates greatly every month, causing the DRBI method to have a higher level of accuracy and the ability to detect potential risks in more detail than the RBI method.
KOMPAKTIBILITAS KOMPOSIT ISOTROPIK Al/Al2O3 DENGAN VARIABEL WAKTU TAHAN SINTER Widyastuti, Widyastuti; Siradj, Eddy S; Priadi, Dedi; Zulfia, Anne
Makara Journal of Science Vol. 12, No. 2
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Compactibility of Al/Al2O3 Isotropic Composite with Variation of Holding Time Sintering. The requirement of component with structural ability, light weight and also strength is increasing base on Metal Matrix Composites (MMCs) by aluminum as matrix (AMCs). A structural ability is connected to composites compactibility which is depend on quality of interfacial bounding. Powder metallurgy is one of method to produce composite with powder mixing, compacting and sintering. Volume fractions reinforced and sintering time can influence composites compactibility. Volume fractions reinforced variable can produce different reinforcement effect. Beside that, on sintering enables the formation of new phase during sintering time. In this research, Al/Al2O3 isotropic composites are made with aluminum as matrix and alumina (Al2O3) as reinforced. Volume fraction reinforced used 10%. 20%. 30% and 40%. Sintering temperature and compaction pressure are each 600o C and 15 kN. The tests that applied are compression and metallographic test. The result that obtained is optimum compactibility of Al/Al2O3 composite reached at holding time 2 hour. During sintering, new phase can occur that is aluminum oxides (alumina), with unstable properties. The best volume fraction reinforced and holding time sintering are 40% and 2 hours.
PENGARUH PELAPISAN PERMUKAAN PARTIKEL SiC DENGAN OKSIDA METAL TERHADAP MODULUS ELASTISITAS KOMPOSIT Al/SiC Zainuri, M; Siradj, Eddy S; Priadi, Dedi; Zulfia, Anne; Darminto, Darminto
Makara Journal of Science Vol. 12, No. 2
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The Influence of Coating Oxide Metal on Surface of SiC Particles to Elastic Modulus of Al/SiC Composites. The isotropic composites of Al/SiC is made by powder metallurgy method, the quality of mechanical materials depend on interfacial bonding between matrix (Al) and reinforcement (SiC). The quality of interfacial bonding can influence to elastic modulus of composites which is made by solid process. SiC particles were coated by metal oxide aim to enhance quality interfacial bonding between matrix and reinforcement. These research using three kinds of coating materials, which are Mg oxide, Cu oxide and Al oxide, and these materials were deposited on surface of SiC particles. From three kinds of materials coating Al2O3 is the best to enhance quality interfacial bonding between matrix and reinforce than the others as CuO or MgO. There is Intermetalic phase formatted on CuO coating, and MgO coating have many porous where they can make decrease quality of Al-SiC composites. All of volume fraction of SiC on the Al/SiC composites, which oxide aluminum coating on SiC surface have highest value of elastic modulus than the others metal oxides.
KOMPAKTIBILITAS KOMPOSIT ISOTROPIK Al/Al2O3 DENGAN VARIABEL WAKTU TAHAN SINTER Widyastuti, Widyastuti; Siradj, Eddy S; Priadi, Dedi; Zulfia, Anne
Makara Journal of Science Vol. 11, No. 2
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Abstract

Compactibility of Al/Al2O3 Isotropic Composite with Variation of Holding Time Sintering. The requirement of component with structural ability, light weight and also strength is increasing base on Metal Matrix Composites (MMCs) by aluminum as matrix (AMCs). A structural ability is connected to composites compactibility which is depend on quality of interfacial bounding. Powder metallurgy is one of method to produce composite with powder mixing, compacting and sintering. Volume fractions reinforced and sintering time can influence composites compactibility. Volume fractions reinforced variable can produce different reinforcement effect. Beside that, on sintering enables the formation of new phase during sintering time. In this research, Al/Al2O3 isotropic composites are made with aluminum as matrix and alumina (Al2O3) as reinforced. Volume fraction reinforced used 10%. 20%. 30% and 40%. Sintering temperature and compaction pressure are each 600o C and 15 kN. The tests that applied are compression and metallographic test. The result that obtained is optimum compactibility of Al/Al2O3 composite reached at holding time 2 hour. During sintering, new phase can occur that is aluminum oxides (alumina), with unstable properties. The best volume fraction reinforced and holding time sintering are 40% and 2 hours.
PENGARUH PELAPISAN PERMUKAAN PARTIKEL SiC DENGAN OKSIDA METAL TERHADAP MODULUS ELASTISITAS KOMPOSIT Al/SiC Zainuri, M; Siradj, Eddy S; Priadi, Dedi; Zulfia, Anne; Darminto, Darminto
Makara Journal of Science Vol. 11, No. 2
Publisher : UI Scholars Hub

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Abstract

The Influence of Coating Oxide Metal on Surface of SiC Particles to Elastic Modulus of Al/SiC Composites. The isotropic composites of Al/SiC is made by powder metallurgy method, the quality of mechanical materials depend on interfacial bonding between matrix (Al) and reinforcement (SiC). The quality of interfacial bonding can influence to elastic modulus of composites which is made by solid process. SiC particles were coated by metal oxide aim to enhance quality interfacial bonding between matrix and reinforcement. These research using three kinds of coating materials, which are Mg oxide, Cu oxide and Al oxide, and these materials were deposited on surface of SiC particles. From three kinds of materials coating Al2O3 is the best to enhance quality interfacial bonding between matrix and reinforce than the others as CuO or MgO. There is Intermetalic phase formatted on CuO coating, and MgO coating have many porous where they can make decrease quality of Al-SiC composites. All of volume fraction of SiC on the Al/SiC composites, which oxide aluminum coating on SiC surface have highest value of elastic modulus than the others metal oxides.
KOMPAKTIBILITAS KOMPOSIT ISOTROPIK Al/Al2O3 DENGAN VARIABEL WAKTU TAHAN SINTER Widyastuti, Widyastuti; Siradj, Eddy S; Priadi, Dedi; Zulfia, Anne
Makara Journal of Science Vol. 12, No. 2
Publisher : UI Scholars Hub

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Abstract

Compactibility of Al/Al2O3 Isotropic Composite with Variation of Holding Time Sintering. The requirement of component with structural ability, light weight and also strength is increasing base on Metal Matrix Composites (MMCs) by aluminum as matrix (AMCs). A structural ability is connected to composites compactibility which is depend on quality of interfacial bounding. Powder metallurgy is one of method to produce composite with powder mixing, compacting and sintering. Volume fractions reinforced and sintering time can influence composites compactibility. Volume fractions reinforced variable can produce different reinforcement effect. Beside that, on sintering enables the formation of new phase during sintering time. In this research, Al/Al2O3 isotropic composites are made with aluminum as matrix and alumina (Al2O3) as reinforced. Volume fraction reinforced used 10%. 20%. 30% and 40%. Sintering temperature and compaction pressure are each 600o C and 15 kN. The tests that applied are compression and metallographic test. The result that obtained is optimum compactibility of Al/Al2O3 composite reached at holding time 2 hour. During sintering, new phase can occur that is aluminum oxides (alumina), with unstable properties. The best volume fraction reinforced and holding time sintering are 40% and 2 hours.
Co-Authors ,, Maimunah ., Dwiono Abdul Khalim Achmad Noerkhaerin Putra Ade Kurniawan Adi Nurapandi Adithya Yanwar H Aep Saepudin Agung, Ujang Pupuh Agus Arifin, Agus Agus Santosa Ahdan, Ahdan Ahmad Afandi Akbar, Teguh Akhmad Olih Solihin Akhmad Sobarna akhmad Sobarna, akhmad Sobarna Akhmad Solihin Alandira, Palendika Alexander Muhammad Akbar Khan Alfaein, Noor Isna Alfaien, Noor Isna Ali Budiman Alpian Amara, Helina Amin Suhadi, Amin Andanari, Runi Andi Muhdiar Kadir Andi Perdana Gumilang Andreano, Yossi Anne Zulfia Apriadi, A Apriansyah, Aldi Ardianto, M. Dwi Arief Fadholi Arin Khairunnisa, Arin Asep Suhendi Asidiqi, Khudri Asmara, Henry Asral, D. Rizal Aulia, Sitinur Afifah Ausias, Gilles Awaliyah, Rivia Azizah Intan Pangesty Badriah, Lilis Siti Badrujamaludin, Asep Bagus Ramdhan Taufik Bahagia Bahagia Baharuddin, Ending Basuki Wibawa Berti Yolida Binardjo, Goro Budiman Budiman Cathaputra, Edo Darma Wijaya Darminto . Darminto . Deni Wahyudi Dermawan, Alvindo Devi puspitasari, Devi Dhaneswara, Donanta Dian Berliansyah Putra Dian Fauzi Dida Fachrurrozi Didin Hafidhuddin MS Djamdjuri, Dewi Suriyani Dwi Budi Santoso Dwi Purnomo Azi Dwiswara, Yoga E. S. Siradj Eddy S Siradj Eddy S. Siradj Efgivia, Mohammad Givi Elriandri, Elriandri Endin Mujahidin Enung Sri Mulyaningsih Erik Yuda Pratama Ernawati Ernawati Eulis Henda Nugraha Evvy Kartini Fadilah, Riski Fadilatussafa’ah, Nita Fariz Maulana Fatimah, Nisa Fatriansyah, Jaka Fajar Fauziah Rudhiati Fauziah Rudhiati Fauziah, Diny Nur Fauziah, Fifi Siti Febriana Dwi Wahyuni Febriyanti, Eka febriyanti, eka febriyanti, eka Federico, Andreas Firdaus, Rifqi Muhammad Firmansyah, Andan Fitri Yanti Fitri, Meidha Floresti, Dwita Aprillia Fransiska, Dina Galang Pratama Gita Febria Friskawati Gunawan Irianto Gustina, Serlina Gustryanti, Kiki Habibullah, Romadhoni Hadi Wibowo Hadi Wibowo Hadyansah , Diky Hambari, Hambari Hani Fitriani, Hani Hari Eko Irianto harkali setiyono harkali setiyono Hartati, Aliyah Hastiana, Sabina Hemi Fitriani Hemi Fitriani Henry Asmara heri aryadi Heri Susanto Herlina, Lily Hermawan, Adi Muldani Heru Sulistiadinata Hidayah, Wafa Hikmat Rudyana Hindun Saadah, Hindun Hutabarat, Evangeline Miliani Ibnu Anwar, Thoriq Ichsanudin, Bangun Ida Ayu Putu Sri Widnyani Ika Handayani Ilma, Ajeng Faizah Ilyasa, Ridhwan Akmal Iman, Ahmad Haidir Indah Uswatun Hasanah Irawansyah Irawansyah Irfan Mubarok Irpan Ali Rahman Ishak, M Ishak, Mochamad Islam, Meivi Sesanelvira Achiroh Dinul Ismafiaty, Ismafiaty Isroni Isroni Isroni, Isroni Iwan Setyadi Iwang Gumilar Jajuk Kusumawaty Jihad, Bagus H Jihad, Bagus H. Joni Firmansyah Junaidi Junaidi Kadarisman, Vicki Ahmad Kadir, Andi Muhdiar Kariyani, Leni Nurul Karyadi, Bambang Kasrisman, Vicki ahmad Khaerunnisa, Reffi Nantia Khaidir Fadil Khristian, Erick Kurnia, Dedi Kurniati Kusuma, Tri Nur Hadi Wijaya Kusumawaty, Jajuk Lahat, Mohammad Amas Lalu Delsi Samsumar, M.Eng. Leo Alexander Tambunan, S.E,M.M Librilianti Kurnia Yuki LILIS ROHAYANI M Arif Rahman, M Arif M. Kadir, Andi M. Kadir, Andi M. Nurman Ardiansyah M. Syukron Anshori M. Zainuri Maknunah, Salsabyla Martinus Adi Anggoro, Martinus Adi MARYANA, ELSA Mas’ud, Alfian Maulidya, Nony Mbiri, Adeo Dato J Barros MJW, Endrian Mochamad Chalid Moeis, Noesyirwan Muchamad Ishak Muhammad Furqan, Muhammad Muhammad Helmi Munawar Ismail Munawar Ismail Muslih Muslih Musni, Musni Muzayin, Muhamad Ikhsan Nanik Indayaningsih Nanik Retnowati Natanael, Ferry Ardika Naurah, Ghina Nurjihan Nawawi, M. Kholil Nesya Nur Annisa Bell Ningsih, Irnawati Nofrijon Sofyan, Nofrijon Noneng Siti Rosidah Nopiyanti, Rifa Noviati, Elis Novyar Satriawan Fikri, KMS Nufus, Nurhayatun Nugraha, Ilham Nur Ikhwayanti Nurapandi, Adi Nurazizah, Tsaniya Nurdiansyah Nurdiansyah Nurfaidah, Hilda Nurfitriani, Dea NURHADI Nurhadi Nurhadi Nurhadi Nurhayani, Dina Nurhayati, Immas Nurjaman, Fadil Nurlinah Nurlinah, Nurlinah Nurmansyah, Andri Nurmuntazlimah, Keisha Siti Nurullia, Zahra Nadia Nurzaelani, Mohammad Muhyidin Oktovina Yesayas Oktovina Yesayas Pater Rajagukguk Pater Rajagukguk, Pater Pauji Salam, Wulan Anugrah Peter Rajagukguk Pramesti P, Vidya Pratama, Aditya Nugraha Purnama, Jeri Nobia Purwita, Mita Putri, Aslina R. Edi Komarudin Rahman, Irpan Rahman, Nurhamidar Ramdhan Taufik, Bagus Rasina Hanifa Rena Rena Rifan Setiawan Rini Riastuti Rini Rita T. Marpaung Riswana, Endang Rizal, Rony M Rizky, M. Ali Yafi Rohendi, Aep Rosalina, Dela Gita Rosila, Anggi Dara Rosmiati Rosmiati Rudi Muslim Rudi Subagja Rudyana, Hikmat Rusman Kosasih, Rusman Rusmana, Ruslan Rustam Efendi S, Harkali S, Harkali Sa'diah, Maemunah Sa’ud, Udin Syaefudin Sae, Donatus Santoso, Mochamad Budi Saprizon, Saprizon Saputra, Aman Saputri, Amelia Sarpi seno sudarmono Hadi Septiana, Rama Adha Shabrina, Nabilla Shopatilah, Elis Sidartha, B. Boy Rahardjo Sihar P Panjaitan Sihotang, Anggiat M Silvy Juditya Siman, Asep Siti, Noneng Sitompul, Lydia Kartika Basaria Sofian Muhlisin sony Hasmarita Sopiyanto, Sopiyanto Sopyan Sopyan SRI RAHAYU Sri Rianawati Sri Wahyuna Sri Wahyuna Suciati Sudarisman Sucipto, Bambang Suharjiman, Suharjiman Suharno Suharno Sukma, Rizki Melati Suliyanti, Maria Margaretha, Prof Sulton Ahmad Sumbara Hambali Suparmi Suparmi Supriady, Andi Supriani, Desta Suryadi - Suryadi, Emi SUSANTI SYAMSUDAR, BANGBANG Syamsul Anwar, Syamsul Syintang Rasi Maliki Taek, Petrus Ans Gregorius Taek, Stevendus Marten Tauba, Ahmad Mumtaz Teguh Akbar Budiana Thoyib, Mastur Toni Bambang Romijarso Tresna P. Soemardi Tria Firza Kumala Triwoelandari, Retno Umar Umar Usni, Wisnu Vicki Ahmad Karisman Vidia Putri, Evrilianti Wahab Wahab Waluyo, Endrian Mulyady Justitia Widayaka, Restu Widyanisya, Intan Niki Widyasari Widyastuti . Widyastuti Widyastuti Wijayanto, Adi Yudho Winarto Winarto Wirnawan, Frendli WISNU JULI WIONO, WISNU JULI Wulandari, Hikmayanti Yana Suryana Yopi M Rizal Yudi Saputra Yuggo Afrianto Yuliyanti, Putri Eka Yunitri, Ninik Yuswandi Yuswandi, Yuswandi Yuyun, Yuyun Zainuri, M Zatnika, Agi Juniadi