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All Journal TEKNIK Jurnal IPTEK JTERA (Jurnal Teknologi Rekayasa) Jurnal Teknologi Terapan Abdimasku : Jurnal Pengabdian Masyarakat Jurnal Cakrawala Maritim Jurnal Teknologi Maritim
Mahardhika, Pekik
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Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Journal : TEKNIK

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Analisis Kenaikan Tekanan Fluida Terhadap Tegangan Dan Fleksibilitas Pipa Blowdown A106 Grade A Berdasarkan ASME B31.3 Mahardhika, Pekik; Julianto, Eko; Indartono, Arie; Kusuma, George E.
TEKNIK Vol 39, No 1 (2018): (July 2018)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.613 KB) | DOI: 10.14710/teknik.v39i1.17118

Abstract

Aplikasi sistem perpipaan untuk distribusi fluida banyak di jumpai dalam kehidupan sehari-hari. Boiler di PLTU beroperasi secara kontinyu sehingga perlu dilakukan proses blowdown secara berkala. Sistem blowdown berguna untuk mengontrol dan membuang kandungan solid dalam sisa air pemanasan. Pertemuan dua zat berbeda fase dan temperatur tinggi pada pipa dapat menimbulkan kenaikan tekanan. Tekanan merupakan salah satu hal yang harus dipertimbangkan dalam sistem perpipaan. Dampak negatif kenaikan tekanan fluida secara kontinyu adalah terjadinya deformasi pipa. Deformasi pipa disebabkan tegangan pipa melebihi nilai tegangan yang diijinkan. Kode yang digunakan adalah ASME B31.3 Piping Process.  Berdasarkan kriteria critical line, pipa blowdown A106 Gr.A merupakan kategori B yang harus dikoreksi dengan metode sederhana. Fluida di dalam pipa blowdown telah terjadi kenaikan tekanan menjadi 322,55 psi dan bersifat turbulen. Berdasarkan ASME B31.3, Tegangan pipa akibat beban sustain setelah terjadi kenaikan tekanan fluida masih berada di bawah tegangan ijin (16000 psi). Fleksibilitas pipa masih di bawah nilai fleksibilitas yang diijinkan. Sistem perpipaan blowdown masih dinyatakan aman.
Analisis Symmetrical dan Nonsymmetrical Vertical Expansion Loop untuk Meningkatkan Fleksibilitas dan Menurunkan Tegangan Pipa Berdasarkan ASME B31.3 Mahardhika, Pekik; Husodo, Adi Wirawan; Kusuma, George Endri; Witjonarko, Raden Dimas Endro; Budiyanto, Ekky Nur
TEKNIK In Press
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v42i1.29244

Abstract

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.
Co-Authors Adi Wirawan Husodo Ahmad, Mahasin Maulana Alam, Hafiz Akbar Anggara Trisna Nugraha Arie Indartono AYU RATNASARI Bambang Antoko Benedicta Dian Alfanda Budianto, Ekky Nur Budiyanto, Ekky Nur Dianita Wardani Ekky Nur Budiyanto Ika Erawati Kusuma, George E. Kusuma, George Endri Luluk Kusminah, Imah Naufal, Muhammad Ellang Novita, Vitalia Dian Purwoko, Agus Puspita Sari, Devina Raden Dimas Endro Witjonarko Rina Sandora Sa’diyah, Aminatus Tamimah, Ni'matut Tarikh Azis Ramadani Witjonarko, R. Dimas Endro