ANALISIS OPTIMALISASI JARINGAN PIPA PADA STASIUN PENERIMA DAN PEMBAGI GAS ALAM

RIZKY, RIZKY (2019) ANALISIS OPTIMALISASI JARINGAN PIPA PADA STASIUN PENERIMA DAN PEMBAGI GAS ALAM. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Piping systems at receiving and distribution stations of natural gas work by receiving supply from upstream regulating positions consisting of several piping devices such as fittings, flanges, relief devices, valves and PCV, which are held by support to maintain the stability of the piping system. PCV has an important role to regulate flowrate based on the difference in pressure of upstream and downstream piping instruments in the Surya Cipta Natural Gas Recipient and Distribution Stations. To find out the design of the PCV that matches the desired capacity of 68 MMscfd, it is necessary to know first the Cv calculated value and the ratio of Cv travel to Cv calculated where the amount of Cv travel must be in the range of 20% to 80% where Cv rated refers to the PCV’s parameter design of manufacture. Adjustment of the size of the PCV affects the burden of the existing piping system so that adjustments are needed at the fulcrum of the piping system to be studied. From the analysis of PCV design calculations, the initial PCV with a nominal diameter of 150 mm (6 inch) was unable to work in normal conditions because the Cv calculated value was at 546.36 and that is exceeded the maximum limit of Cv rated of 357 so the PCV must be upsized to 200 mm (8 inch) because it has Cv calculated at 508.7 and it is below of Cv rated at 808 with the amount of Cv travel reaching 63% when conditions of Cv calculated = 508.7. With that change, the question arises as to how the effect of the PCV design changes on pipe stress on existing conditions. The results of the analysis using CAESAR II modeling showed that the addition of pipe support at several node points such as node 15 and, node 52provides good resistance and can reduce the pipe stress which initially reaches 14.9 MPa (maximum sustain condition) can lowered down to 5,24 MPa. With the addition of this support, the piping system will be feasible and safe to use. Keywords: PCV, Cv rated, Cv calculated, Cv travel, Stress, Sustain, Support, CAESAR II. Sistem perpipaan pada stasiun penerima dan pembagi gas alam bekerja dengan cara menerima supply dari posisi upstream regulating yang terdiri dari bebebrapa perangkat perpipaan seperti fitting, flensa, perangkat relief, katup (valve), serta PCV, yang ditumpu oleh support untuk menjaga ketabilan sistem perpipaan. PCV memiliki peranan penting untuk mengatur flowrate berdasarkan perbedaan tekanan upstream dan downstream instrumen perpipaan yang ada di Stasiun Penerima dan Pembagi Gas Alam Surya Cipta. Untuk mengetahui desain PCV yang sesuai dengan kapasitas yang diinginkan sebesar 68 MMscfd, perlu diketahui terlebih dahulu nilai Cv calculated dan rasio Cv travel terhadap Cv calculated dimana besaran Cv travel harus berada pada kisaran 20% sampai 80% dimana Cv rated mengacu pada desain parameter PCV dari manufaktur. Penyesuain ukuran PCV berpengaruh kepada pembebanan sistem perpipaan yang telah ada sehingga dibutuhkan penyesuaian terhadap titik-titik tumpuan sistem perpipaan yang akan diteliti. Dari hasil analisis perhitungan desain PCV, PCV awal dengan diameter nominal 150 mm (6 inch) tidak mampu bekerja pada kondisi normal karena nilai Cv calculated berada pada 546,36 dan melebihi batas maksimum Cv rated sebesar 357 sehingga PCV harus di upsize menjadi ukuran 200 mm (8 inch) karena memiliki Cv calculated berada pada 508,7 dan dibawah Cv rated sebesar 808 dengan besaran Cv travel mencapai 63% pada kondisi Cv calculated = 508,71. Dengan adanya perubahan muncul pertanyaan bagaimana efek dari perubahan desain PCV tersebut terhadap stress pipa pada kondisi eksisting. Dari hasil analisis dengan menggunakan pemodelan CAESAR II didapatkan hasil bahwa penambahan support pipa pada titik node seperti node 15dan node 52 memberikan tahanan yang baik dan dapat mereduksi stress pipa yang semula mencapai 14,9 Mpa (kondisi sustain maksimum) dapat diturunkan menjadi 5,24 Mpa. Dengan penambahan support ini, maka sistem perpipaan akan layak dan aman untuk digunakan. Kata Kunci :PCV, Cv rated, Cv calculated, Cv travel, Stress, Sustain, Support, CAESAR II.

Item Type: Thesis (S1)
Call Number: ST/13/19/025
NIM: 41317110037
Uncontrolled Keywords: PCV, Cv rated, Cv calculated, Cv travel, Stress, Sustain, Support, CAESAR II.
Subjects: 300 Social Science/Ilmu-ilmu Sosial > 380 Commerce, Communications, Transportation (Perdagangan, Komunikasi, Transportasi) > 388 Ground Transportation/Transportasi Jalan Raya > 388.5 Pipeline Transportation/Transportasi Pipa
600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 624 Civil Engineering/Teknik Sipil
600 Technology/Teknologi > 690 Buildings/Teknik Bangunan > 696 Energy and Environmental of Building/Pengaturan Energi dan Lingkungan Sekitar Bangunan > 696.2 Pipe Fitting/Pemasangan Pipa Gas
600 Technology/Teknologi > 690 Buildings/Teknik Bangunan > 697 Heating, ventilating, air-conditioning engineering/Teknik Pemanasan Rumah, Teknik Pemanas Ruangan, Teknik Ventilasi dan Pendingin Ruangan AC > 697.7 Chimneys and Flues/Teknik Cerobong Asap dan Pipa Asap
Divisions: Fakultas Teknik > Teknik Mesin
Depositing User: Dede Muksin Lubis
Date Deposited: 24 Sep 2019 02:09
Last Modified: 24 Sep 2019 02:09
URI: http://repository.mercubuana.ac.id/id/eprint/47554

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