Failure Analysis of Shaft Circulating Water Pump (CWP) used in Power Plant

Hamid, Abdul; Nugroho, Sri; Haryadi, Gunawan Dwi; Khaeroman,

doi:10.1051/matecconf/201815902027

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…Fungsi umum WCP adalah untuk mengalirkan atau memompa air laut sebagai air pendingin yang dikontakkan dengan condenser [3]. Keberadaan WCP adalah sangat penting dalam menjaga keberlangsungan proses produksi listrik [4]. Kegagalan dalam sistem WCP akan mengakibatkan kegagalan dalam dalam produksi listrik.…”

Section: Pendahuluanunclassified

Studi penyebab dan penanganan fail detection pada shinkawa vibration sensors unit circulating water pump di PT. X menggunakan metode root cause failure analysis

Barik,

Handaja

2023

eltek

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Circulating Water Pump merupakan salah satu equipment penting pada proses operasi di PT X. Oleh karena itu sistem permesinan harus dijaga dan dirawat dengan baik agar selalu dalam kondisi yang prima. Untuk meningkatkan kehandalan, sistem dipasang pendeteksi getaran yang akan membuat sistem menjadi trip untuk menghindari dari kerusakan yang fatal dengan memasang Shinkawa Vibration Sensor yang akan mendeteksi kerusakan bantalan yang dideteksi dengan adanya getaran berlebih. Prinsip kerja dari Shinkawa Vibration Sensor adalah dengan menggunakan Non-Contact Displacement Transducer yaitu dengan mengukur gap antara sensor dan bantalan. Pada artikel ini, sistem pendeteksi getaran mengalami fail detection, sistem trip tetapi semua peralatan dan bantalan dalam kondisi baik. Berdasarkan analisa menggunakan Root Cause Failure Analysis disimpulkan penyebabnya adalah adanya getaran akibat petir. Untuk itu dilakukan penanganan dengan setting ulang agar tidak terulang kembali ABSTRACTThe Circulating Water Pump is one of the important equipment in the operational process at PT X. Therefore, the machinery system must be maintained properly so that it is always in prime condition. To increase reliability, a vibration detector is installed in the system which will trip the system to avoid fatal damage by installing a Shinkawa Vibration Sensor which will detect bearing damage which is detected by excessive vibration. The working principle of the Shinkawa Vibration Sensor is to use a Non-Contact Displacement Transducer, namely by measuring the gap between the sensor and the bearing. In this article, the vibration detection system experienced failed detection, the system tripped but all equipment and bearings were in good condition. Based on analysis using Root Cause Failure Analysis, it was concluded that the cause was vibrations caused by lightning. For this reason, handling is carried out by resetting so that it does not happen again.

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Section: Pendahuluanunclassified

Studi penyebab dan penanganan fail detection pada shinkawa vibration sensors unit circulating water pump di PT. X menggunakan metode root cause failure analysis

Barik,

Handaja

2023

eltek

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“…If the signs of beach mark formation are not clearly visible, the fatigue crack propagation can be identified by formation of striations using SEM fractographs [15]- [16]. Meanwhile, in areas with final fractures, SEM fractographs usually exhibit dimple pattern in case of ductile fractures or chevron markings (or cleavage) pattern in case of brittle fractures [1]- [3].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Failure in a Longitudinal Welded Elbow of a Processing Vessel

Adnyana

2022

metal.

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A longitudinal welded elbow made of austenitic stainless steel type 316 and used as a drain line on a processing vessel had suffered damage (leakage) after it had only been in operation for a few years. Process fluid that was drained out of the vessel consists of fatty acid containing hydrogen gas at a temperature of 150°C and a pressure of 60 bar(g). Initially, the drain process was carried out only once a year, but recently due to frequent changes in the types of product being made, the frequency of drain process has increased to several times a month. This study aims to determine the type and factors that have caused leakage in the elbow. Metallurgical assessment was carried out by preparing a number of specimens from the leaking elbow. A number of laboratory examinations were performed including visual and macroscopic tests, chemical composition analysis, metallographic examination, hardness tests and scanning electron microscopy (SEM) equipped with energy-dispersive spectroscopy (EDS) analysis. The results obtained indicate that the leaking elbow has experienced fatigue failure due to cyclic loadings caused by the increasing frequency of the number of drain processes carried out through the elbow. The factor causing fatigue failure at the elbow is likely due to welding defect of imperfect shape that formed on the inner wall of the elbow around the HAZ (heat-affected zone)/fusion boundary, and causing high stress concentrations in that area.

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“…In shipping, the water pump is considered the heart of the engine's cooling system. It circulates uninterruptedly the water throughout the entire cooling circuit and regulates the coolant flow rate [1]. Its working principle is based on the impeller rotation that causes the water to flow towards the periphery due to the centrifugal force generated.…”

Section: Introductionmentioning

confidence: 99%

Fracture analysis of a cooling water pump shaft

Papageorgiou

Kovsenoglou

Bournelis³

et al. 2018

MATEC Web Conf.

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Six shaft failures were encountered in a centrifugal water pump, part of the engine cooling system of a container ship. The last two failed pieces were received for analysis. A detailed study was carried out to determine the cause of the component failures. Historical data was collected, visual inspection was performed and a photographic file was created. The pieces were measured in order to record their general features and a 3-D model was generated. Hardness measurements were carried out. Microstructure was examined by means of light microscopy. A finite element simulation was conducted in order to determine the stress topology and to identify possible critical areas. Chemical analysis was carried out. The shafts were manufactured onboard, from AISI 304 stainless steel. The low hardness of both pieces indicates insufficient mechanical properties. Microstructural examination showed characteristic microstructure of coarse austenite. The presence annealing process derived twins and limited grain-boundary carbide precipitates were verified. The shafts failed due to torsional fatigue. Fracture initiated at the keyway on the propeller side as it was predicted from the finite elements analysis. Material selection material has and poor machining were found to be the main cause of failure. Appropriate recommendations were provided.

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Failure Analysis of Shaft Circulating Water Pump (CWP) used in Power Plant

Cited by 5 publications

References 17 publications

Studi penyebab dan penanganan fail detection pada shinkawa vibration sensors unit circulating water pump di PT. X menggunakan metode root cause failure analysis

Studi penyebab dan penanganan fail detection pada shinkawa vibration sensors unit circulating water pump di PT. X menggunakan metode root cause failure analysis

Fatigue Failure in a Longitudinal Welded Elbow of a Processing Vessel

Fracture analysis of a cooling water pump shaft

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