Analisa Pengaruh Kenaikan Tekanan Fluida Terhadap Tegangan Dan Fleksibilitas Pipa Blowdown A106 Grade a Berdasarkan Asme B31.3

Mahardhika, Pekik; Julianto, Eko; Indartono, Arie; Kusuma, George Endri

doi:10.14710/teknik.v39i1.17118

Cited by 4 publications

(6 citation statements)

References 1 publication

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“…Ekspansi pipa berpengaruh terhadap fleksibilitas dan tegangan pipa sehingga perlu didesain expansion loop. Tegangan yang terjadi melebihi tegangan yang diijinkan code maka bisa terjadi deformasi pipa ataukah kegagalan sistem perpipaan (Mahardhika, Julianto, Indartono, & Kusuma, 2018). Tegangan pada desain suatu sistem perpipaan harus dirancang agar mampu menahan beban yang terjadi (Hasan, Santoso, & Mahardhika, 2017).…”

Section: Pendahuluanunclassified

Analysis of Symmetrical and Nonsymmetrical Vertical Expansion Loop to Increase Flexibility And Reduce Pipe Stress Based On ASME B31.3

Mahardhika¹,

Husodo²,

Kusuma³

et al. 2021

TEKNIK

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Thepiping system is a medium used to convey, distribute, mix, separate, discharge, meter, control or snub fluid flows, and transmit a fluid pressure. The piping system design will have stresses due to thermal and pressure effect. The thermal effect induce pipe expansion. The pipe expansion affect to pipe flexibility, so it is necessary to design an expansion loop. Expansion loop is a method used to increase flexibility in piping systems. This article aims to analyze symmetrical and non-symmetrical in vertical expansion loops whether it can increase flexibility and reduce pipe stress. This article conducts an expansion loop design with 3 trials, namely trial 1 (Vertical Expansion Loop), trial 2 (Nonsymmetrical Vertical Expansion Loop 1), and trial 3 (Nonsymmetrical Vertical Expansion Loop 2). The three trials were compared for flexibility and stress values based on ASME B31.3 requirements. The study results show that all trial 1, trial 2, and trial 3 have good flexibility with a value of 0.00016 because not exceed the requirements of ASME B31.3. The highest design code stress value in trial 1 is 5955 psi (Node A07F), trial 2 is 5906 psi (Node A05F), and trial 3 is 5906 psi (Node A06N). All trials have a code stress not exceeding the allowable stress (20000 psi). So that the symmetrical or nonsymmetrical design of the vertical expansion loop can both increase flexibility and reduce pipe stress.

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Section: Pendahuluanunclassified

Analysis of Symmetrical and Nonsymmetrical Vertical Expansion Loop to Increase Flexibility And Reduce Pipe Stress Based On ASME B31.3

Mahardhika¹,

Husodo²,

Kusuma³

et al. 2021

TEKNIK

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“…Besarnya nilai tegangan tidak boleh lebih besar dari tegangan yang diijinkan ASME B31.3 (ASME, 2016). Jika tegangan yang terjadi melebihi tegangan yang diijinkan code maka bisa terjadi deformasi pipa ataukah kegagalan sistem perpipaan (Mahardhika, Julianto, Indartono, & Kusuma, 2018). Sehingga dalam proses perancangan sistem perpipaan diperlukan analisa tegangan statis ataupun dinamis untuk menjamin keamanan rancangan dan operasional pipa (Mahardhika, 2018).…”

Section: Pendahuluanunclassified

“…Jika tegangan yang terjadi melebihi tegangan yang diijinkan code maka bisa terjadi deformasi pipa ataukah kegagalan sistem perpipaan (Mahardhika, Julianto, Indartono, & Kusuma, 2018). Sehingga dalam proses perancangan sistem perpipaan diperlukan analisa tegangan statis ataupun dinamis untuk menjamin keamanan rancangan dan operasional pipa (Mahardhika, 2018). Analisa tegangan merupakan metode terpenting untuk meyakinkan dan menetapkan secara numerik bahwa sistem perpipaan dalam engineering adalah aman (Chamsudi, 2005) (Kannappan, 1986).…”

Section: Pendahuluanunclassified

Desain Peletakan Penyangga Dan Evaluasi Tegangan Pada Sistem Perpipaan Fluida Massecuite Dari Reheater Menuju Feed Mixer

Mahardhika¹

2020

JTT

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The sugar industry is a very important industry in Indonesia to meet the needs of the domestic market. One of the products of the sugar company is white crystal sugar. In the process of producing white sugar there is a fluid called Massecuite. Massecuite is a mixture of fluid crystals of sugar and water. Massecuite can cause sedimentations and blockages in the pipeline from the heater to the feed mixer. The line pipe from the reheater to the feed mixer has been redesigned. But the line pipe has not been designed for laying penyangga and evaluate piping stress. So that the line pipe needs to be designed for laying penyangga and evaluate piping stress. Evaluation of piping stress accordance to ASME B31.3 Process Piping. This evaluation aims to ensure that the line pipe design comply with ASME B31.3 requirements. The evaluation results evidence that the stress in the line pipe from the reheater to the feed mixer still meets the ASME B31.3 criteria. The line pipe design from the reheater to the feed mixer can be declared safe.

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“…Berdasarkan penelitian sebelumnya pipa blowdown A106 Gr A termasuk jalur pipa critical line [13]. Fluida di dalam pipa blowdown telah mengalami kenaikan tekanan menjadi 322,55 psi dan bersifat turbulen [14]. Pada makalah ini dilakukan penerapan metode time history pada kasus water hammer pipa blowdown di salah satu PLTU di Indonesia untuk mendapatkan nilai fleksibilitas yang terjadi dan apakah masih memenuhi kriteria ASME B31.3.…”

Section: Pendahuluanunclassified

“…Adapun dalam penelitian ini terdapat data pendukung yaitu data teknis dan gambar isometri pipa blowdown sebagai berikut: Tabel 1. Data teknis Pipa Blowdown[14]…”

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Penerapan Metode Time History Untuk Fenomena Water Hammer

Mahardhika¹

2018

teknologimaritim

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AbstrakMakalah ini mengkaji besarnya fleksibilitas dan frekuensi alami pipa akibat beban dinamis dari fenomena water hammer menggunakan metode time history. Metode time history adalah metode analisis untuk menentukan beban dinamis yang memiliki waktu lama atau pendek seperti water hammer, gempa bumi, dan lain-lain. Beban dinamis adalah gaya yang bekerja (eksitasi) pada struktur sistem perpipaan yang bervariasi terhadap waktu. Tujuan dari metode time history ini untuk mendapatkan besarnya fleksibilitas dan frekuensi alami pipa akibat beban dinamis pada pipa blowdown agar menjamin keamanan rancangan dan operasional pipa Simulasi dilakukan dengan cut off frequency 54,31 Hz dan 31 mode dengan durasi 2,14 detik. Dari hasil analisa tegangan diperoleh total tegangan pipa masih masih memenuhi kriteria tegangan ijin ASME B31.3. Dari hasil analisa frekuensi alami diperoleh frekuensi alami mode terkecil yaitu 1,75 Hz dan tidak memenuhi kriteria DNV-RP-D101. AbstractThis paper examines the magnitude of pipe flexibility and natural frequency due to dynamic loads of water hammer phenomenon using the time history method. The time history method is an analytical method to determine dynamic loads that have a long or short time such as water hammer, earthquake, and others. Dynamic load is the force acting (excitation) on the structure of the piping system which varies with time. The purpose of this time history method is to get the magnitude of flexibilityand natural frequency of pipe due to the dynamic load on the blowdown pipe to ensure the safety of the pipe design and operation. The simulation was performed with the cut off frequency of 54.31 Hz and 31 mode with a duration of 2.14 seconds. From the stress analysis result obtained total pipe stress still meet ASME B31.3 allowable stress criteria. From the natural frequency analysis result obtained smallest mode of natural frequency is 1.75 Hz and not meet DNV-RP-D101 criteria.

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Analisa Pengaruh Kenaikan Tekanan Fluida Terhadap Tegangan Dan Fleksibilitas Pipa Blowdown A106 Grade a Berdasarkan Asme B31.3

Cited by 4 publications

References 1 publication

Analysis of Symmetrical and Nonsymmetrical Vertical Expansion Loop to Increase Flexibility And Reduce Pipe Stress Based On ASME B31.3

Analysis of Symmetrical and Nonsymmetrical Vertical Expansion Loop to Increase Flexibility And Reduce Pipe Stress Based On ASME B31.3

Desain Peletakan Penyangga Dan Evaluasi Tegangan Pada Sistem Perpipaan Fluida Massecuite Dari Reheater Menuju Feed Mixer

Penerapan Metode Time History Untuk Fenomena Water Hammer

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