Evaluation of Unreliable Flow Lines with Limited Buffer Capacities and Spare Part Provisioning

2022 ◽  
Author(s):  
F.E. Sachs ◽  
S. Helber ◽  
G.P. Kiesmüller
Keyword(s):  
Spare Part ◽  
Flow Lines ◽  
Buffer Capacities

Optimalisasi Perawatan Dan Pengoperasian Alat Keselamatan Sekoci Sebagai Penunjang Keselamatan Di Mv Kartini Baruna

2020 ◽  
Vol 2 (1) ◽  
pp. 197-202
Author(s):  
Rudiana ◽  
Rr. Retno Safitri ◽  
Retno Junita
Keyword(s):  
Spare Part ◽  
Maintenance System

Sekoci merupakan alat penolong yang dapat digunakan untuk evakuasi seluruh awak kapal karena memiliki konstruksi yang lebih kuat dari alat penolong lainnya. Masalah yang sering terjadi adalah kurang terampilnya ABK tentang perawatan dan pengoperasian sekoci yang sesuai dengan prosedur dan rendahnya  perawatan sekoci di atas MV Kartini Baruna. Kemudian tujuan penelitian ini yaitu untuk mengetahui penyebab kurang terampilnya ABK tentang perawatan dan pengoperasian sekoci yang sesuai dengan prosedur dan mengetahui penyebab rendahnya  perawatan sekoci di atas MV Kartini Baruna. Metode yang digunakan adalah deskriptif kualitatif. Dari hasil penelitian diperoleh kesimpulan bahwa faktor yang menyebabkan kurang optimalnya kinerja dari sekoci di MV. Kartini Baruna adalah kurangnya spare part, penerapan PMS (Plan Maintenance System) yang tidak sesuai ketentuan, kurang terampilnya anak buah kapal (ABK) dalam pengoperasian sekoci. Faktor yang menyebabkan perawatan lifeboat yang kurang baik terhadap crew di MV. Kartini Baruna adalah lambatnya proses pengoperasian sekoci, membahayakan keselamatan crew diatas kapal. Kemudian upaya yang dilakukan untuk mengoptimalkan perawatan terhadap lifeboat di MV.Kartini Baruna yaitu dengan menerapkan PMS (plan maintenance system) sesuai ketentuan atau panduan

Thermodynamic Modelling of Gas Hydrate Formation in the Presence of Inhibitors and the Consideration of their Effect

2014 ◽  
Vol 14 (1) ◽  
pp. 45
Author(s):  
Peyman Sabzi ◽  
Saheb Noroozi
Keyword(s):  
Gas Hydrates ◽  
Gas Hydrate ◽  
Low Temperatures ◽  
Hydrate Formation ◽  
Transportation Systems ◽  
Flow Lines ◽  
Main Approach ◽  
Efficient Inhibitor ◽  
System A ◽  
Gas Hydrate Formation

Gas hydrates formation is considered as one the greatest obstacles in gas transportation systems. Problems related to gas hydrate formation is more severe when dealing with transportation at low temperatures of deep water. In order to avoid formation of Gas hydrates, different inhibitors are used. Methanol is one of the most common and economically efficient inhibitor. Adding methanol to the flow lines, changes the thermodynamic equilibrium situation of the system. In order to predict these changes in thermodynamic behavior of the system, a series of modelings are performed using Matlab software in this paper. The main approach in this modeling is on the basis of Van der Waals and Plateau's thermodynamic approach. The obtained results of a system containing water, Methane and Methanol showed that hydrate formation pressure increases due to the increase of inhibitor amount in constant temperature and this increase is more in higher temperatures. Furthermore, these results were in harmony with the available empirical data.Keywords: Gas hydrates, thermodynamic inhibitor, modelling, pipeline blockage

scholarly journals The Effect of Flow Lines on the Mechanical Properties in Hot-Rolled Bearing Steel

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 456
Author(s):  
Dongsheng Qian ◽  
Chengfei Ma ◽  
Feng Wang
Keyword(s):  
Mechanical Characterization ◽  
Tensile Deformation ◽  
Flow Line ◽  
Plastic Property ◽  
Bearing Steel ◽  
Mechanical Anisotropy ◽  
Flow Lines ◽  
Significant Difference ◽  
Hot Rolled ◽  
Bearing Rings

Hot rolling is an essential process for the shape-forming of bearing steel. It plays a significant role in the formation and distribution of flow lines. In this work, the effect of flow lines is investigated by analyzing the microstructure and mechanical anisotropy of hot-rolled bearing steel. It was found that carbides rich with Cr and Mn elements are distributed unevenly along the flow-line direction of the hot-rolled bearing steel. Moreover, the mechanical characterization indicates that ultimate tensile strength and yield strength do not have any significant difference in two directions. Nevertheless, an ultrahigh section shrinkage of 57.51% is obtained in the 0° sample that has parallel flow lines, while 90° sample shows poor section shrinkage. The uneven distributed carbides will affect the direction and speed of crack propagation during tensile deformation. Therefore, the 0° and 90° samples exhibit great difference in plastic property. Meanwhile, after tensile deformation, a delaminated texture is observed in the flow lines, which may be caused by different degrees of deformation of grains due to the uneven distribution of carbides. The results of this work may provide guidance for controlling and optimizing flow lines in the manufacturing of bearing rings.

scholarly journals Policy Analysis on Spare Part Inventory of Critical Asset with Life Cycle Cost Approach

2021 ◽  
Vol 1764 (1) ◽  
pp. 012185
Author(s):  
Winda Nur Cahyo ◽  
Riza S.I. Raben ◽  
Haryo Prawahandaru ◽  
Bayu A. Swasono ◽  
Riyan Tri Sutartono ◽  
...  
Keyword(s):  
Life Cycle ◽  
Policy Analysis ◽  
Life Cycle Cost ◽  
Spare Part ◽  
Cost Approach

Guarding the Public Interest: England's Coroners and Organ Transplants, 1960–1975

2015 ◽  
Vol 54 (4) ◽  
pp. 926-946 ◽  
Author(s):  
Helen MacDonald
Keyword(s):  
Twentieth Century ◽  
Public Interest ◽  
Spare Part ◽  
Organ Transplants ◽  
Legal Requirement ◽  
The Public ◽  
The Law ◽  
Do So

AbstractFrom the mid-twentieth century, England's coroners were crucial to the supply of organs to transplant, as much of this material was gleaned from the bodies of people who had been involved in accidents. In such situations the law required that a coroner's consent first be obtained lest removing the organs destroy evidence about the cause of the person's death. Surgeons challenged the legal requirement that they seek consent before taking organs, arguing that doing so hampered their quick access to bodies. Some coroners willingly cooperated with surgeons while others refused to do so, coming into conflict with particular transplanters whom they considered untrustworthy. This article examines how the phenomenon of “spare part” surgery challenged long-held conceptions of the coroner's role.

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