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All Journal Jurnal Polimesin Journal of Evrimata: Engineering and Physics
Talifatim Machfuroh
State Polytechnic of Malang
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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The Effect of Location Class Category and Pipe Wall Thickness on Risk Level Onshore Pipeline Oil Zakki Fuadi Emzain; Makhmudul Fikri; Satworo Adiwidodo; Ratna Monasari; Talifatim Machfuroh
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4082

Abstract

Pipelines are essential infrastructure for efficient oil and gas production operation, necessitating their continuous and reliable functionality in all locations and circumstances. Nevertheless, the pipeline can fail during operation due to multiple detrimental variables. This study evaluated the impact of the location classification category and pipe wall thickness on the risk level of onshore pipelines. The risk assessment method employed was a semiquantitative approach derived from the reference "Pipeline Risk Management Manual" by W. Kent Muhlbauer. The distributing crude oil pipeline, which spans a distance of 18 kilometers and has a diameter of 6 inches, was evaluated. The evaluation yielded a pipeline relative risk score of 0.91, classifying the pipeline as belonging to risk category 1B. Following this, the assessment findings were analyzed for all 36 pipeline segments, classifying 26 segments in the 1B category and the remaining 10 segments in the 2B category. From the analysis results, the difference between the two risk categories was produced by differences in location class categories, where the pipeline segment in location class 1 creates a 1B risk category; meanwhile, class 3 produces a 2B risk category. Furthermore, a pipeline with a wall thickness of 5.156 inches is associated with a risk score of 0.81, but a wall thickness of 4.1 inches yields a score of 1.41. These results indicate that the location class category and pipe wall thickness significantly impact the risk of onshore pipelines.
Response of Vibration Reduction with Additional of Dual Dynamic Vibration to The Main System Talifatim Machfuroh; Zakiyah Amalia; Fica Aida Nadhifatul Aini
Journal of Evrímata: Engineering and Physics Vol. 01 No. 01, 2023
Publisher : PT. ELSHAD TECHNOLOGY INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70822/journalofevrmata.vi.4

Abstract

Excessive vibration in a system occurs when the force acting on a system is close to the natural frequency of the system. This vibration can be reduced by adding a dynamic vibration absorber (DVA) to the system. Several researchers have done a lot of research related to DVA and dual DVA (DDVA) placement in the main system. In this research, we conducted a study of the effect of DDVA-dependent addition on translational and rotational vibration responses in the 2-dof main system. This research was started by building a prototype of a 2 DOF vibration system without DDVA and with DDVA. From the prototype, equations of motion and block simulations were then made to determine changes in vibration characteristics that occur in the main system. From the research results it was found that the placement of the DDVA-dependent cantilever absorber at the end of the system with rI 1/10 was able to reduce the vibration of the main system with a percentage reduction at a frequency of 12.78 Hz of 94.1681% for the translation direction and 15.3878% for the rotation direction. Changes in the distance ratio and the inertia ratio of the absorber mass do not affect the DDVA-dependent ability to reduce vibrations in the translation direction.
Co-Authors Fica Aida Nadhifatul Aini Makhmudul Fikri Ratna Monasari Satworo Adiwidodo Zakiyah Amalia Zakki Fuadi Emzain