scholarly journals Analisis Peletakan dan Kebutuhan Proteksi Katodik Pada Mooring Buoy di Pertamina Fuel Terminal Luwuk

2021 ◽  
pp. 18-25
Author(s):  
Windi Widianingrum ◽  
Juswan Sade ◽  
Habibi Palippui
Keyword(s):  
Cathodic Protection ◽  
Sacrificial Anode ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

Korosi adalah salah satu penyebab kerusakan yang umum terjadi pada mooring buoy akibat adanya oksidasi pada permukaan pelat baja. Tujuan dari penelitian ini adalah untuk mengetahui kebutuhan dan peletakan proteksi katodik serta biaya yang dibutuhkan dalam pengadaan proteksi katodik pada mooring buoy dengan menggunakan aturan BKI (Biro Klasifikasi Indonesia) dan DNV (Det Norske Veritas Industry Norway). Dalam sistem proteksi katodik terdapat dua metode proteksi katodik yaitu Sacrificial Anode Cathodic Protection (Anoda Korban) dan Impressed Current Cathodic Protection (ICCP). Pada penelitian ini digunakan metode anoda korban karena instalasi lebih sederhana sehingga tidak memerlukan keahlian khusus dan penghubung anoda telah terlindungi secara katodik. Mooring buoy dengan tinggi 2,380 m, berdiameter 3,200 meter dengan umur desain proteksi katodik yaitu 5 tahun. Anoda yang digunakan pada penelitian ini adalah anoda dengan tipe Longated flush-mounted Z9.0H1 (Welded Type) dengan dimensi 355 x 85 x 45 mm. Dari hasil penelitian ini  didapatkan total massa anoda yang dibutuhkan untuk memproteksi mooring buoy adalah 48 kg dengan jarak pemasangan antar anoda pada pelat lambung topside adalah 2,000 m dan pada pelat bottom swim lambung adalah 3,000 m serta estimasi biaya yang dibutuhkan dalam pengadaan proteksi katodik mooring buoy adalah Rp. 7.487.075. 

Cathodic Protection Design Consideration for an Offshore Flexible Riser Connected to an Impressed Current System

2021 ◽  
Author(s):  
Thierry Dequin ◽  
Clark Weldon ◽  
Matthew Hense
Keyword(s):  
Cathodic Protection ◽  
Sacrificial Anode ◽  
Flexible Riser ◽  
Flexible Pipe ◽  
Linear Resistance ◽  
Flexible Pipes ◽  
Flexible Risers ◽  
Impressed Current ◽  
Host Structure ◽  
Impressed Current Cathodic Protection

Abstract Flexible risers are regularly used to produce oil and gas in subsea production systems and by nature interconnect the subsea production system to the floating or fixed host facilities. Unbonded flexible pipes are made of a combination of metallic and non-metallic layers, each layer being individually terminated at each extremity by complex end fittings. Mostly submerged in seawater, the metallic parts require careful material selection and cathodic protection (CP) to survive the expected service life. Design engineers must determine whether the flexible pipe risers should be electrically connected to the host in order to receive cathodic protection current or be electrically isolated. If the host structure is equipped with a sacrificial anode system, then electrical continuity between the riser and the host structure is generally preferred. The exception is often when the riser and host structure are operated by separate organizations, in which case electrical isolation may be preferred simply to provide delineation of ownership between the two CP systems. The paper discusses these interface issues between hull and subsea where the hull is equipped with an impressed current cathodic protection (ICCP) system, and provides guidance for addressing them during flexible pipe CP design, operation, and monitoring. Specifically, CP design philosophies for flexible risers will be addressed with respect to manufacturing, installation and interface with the host structure’s Impressed Current Cathodic Protection (ICCP) system. The discussion will emphasize the importance of early coordination between the host structure ICCP system designers and the subsea SACP system designers, and will include recommendations for CP system computer modeling, CP system design operation and CP system monitoring. One of the challenges is to understand what to consider for the exposed surfaces in the flexible pipes and its multiple layers, and also the evaluation of the linear resistance of each riser segment. The linear resistance of the riser is a major determinant with respect to potential attenuation, which in turn largely determines the extent of current drain between the subsea sacrificial anode system and the hull ICCP system. To model the flexible riser CP system behavior for self-protection, linear resistance may be maximized, however the use of a realistic linear resistance is recommended for evaluation of the interaction between the host structure and subsea system. Realistic flexible linear resistance would also reduce conservatism in the CP design, potentially save time during the offshore campaign by reducing anode quantities, and also providing correct evaluation of drain current and stray currents.

scholarly journals DESIGN ANALYSIS OF IMPRESSED CURRENT CATHODIC PROTECTION (ICCP) SYSTEM FOR UNDERWATER STRUCTURE OF INDONESIAN WARSHIP (KRI)

JOURNAL ASRO ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 134
Author(s):  
Arda Arda Widyaksa ◽  
Pompy Pratisna ◽  
Wawan Kusdiana ◽  
M. Yunus Abdullah
Keyword(s):  
Cathodic Protection ◽  
Sea Water ◽  
Design Analysis ◽  
Sacrificial Anode ◽  
Reference Standard ◽  
Corrosion Attack ◽  
Impressed Current ◽  
Underwater Structure ◽  
Theory Calculation ◽  
Impressed Current Cathodic Protection

In carrying out these basic tasks the Navy relies heavily on the readiness of the Indonesian Warship (KRI),including the readiness of underwater construction in KRI from corrosion attack on sea water. Nowadays, KRIuses Sacrificial Anode Cathodic Protection (SACP) from corrosion attack. Whereas, SACP system has someweakness, such as the lifetime protection is short. The aim of this paper is to the analysis of Impressed CurrentCathodic Protection (ICCP) design of the underwater structure of KRI using computative theory calculation andspecimen test. The results of ICCP design showed that the specimens I required 0.081 Ampere (A) forprotection current, specimen 2 required 0.010 A for protection current, specimens 3 required 0.00251 A. Withpotential protection between -800 mV up to -1100 mV, it described that the ICCP system is reasonable. Theresult of cathodic protection design towards an underwater structure of KRI (TR-40 Type) showed that 1.75 forAmpere (A) and 3.35 volt DC for voltage. The benefit of this paper is a reference standard in the planning of theICCP design at KRI.Keywords: Corrosion, Underwater Structure of Warship, Impressed Current Cathodic Protection (ICCP).

scholarly journals P PENGGUNAAN METODE IMPRESSED CURRENT CATHODIC PROTECTION (ICCP) DALAM PENCEGAHAN KOROSI PADA JALUR PIPA 24” SKG X PRABUMULIH BARAT – CAMBAI PT PERTAMINA EP ASSET 2 FIELD PRABUMULIH

2019 ◽  
Vol 10 (01) ◽  
pp. 41-57
Author(s):  
Roni Alida ◽  
Budiono Budiono
Keyword(s):  
Cathodic Protection ◽  
Sacrificial Anode ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

Salah satu penyebab kerusakan pada sistem jaringan dan fasilitas pipa distribusi gas yaitu korosi. Untuk mencegah terjadinya korosi pada pipa flowline, PT Pertamina EP Asset 2 Field Prabumulih yang berada di SKG X Prabumulih Barat menggunakan sistem proteksi katodik. Proteksi Katodik (Cathodic Protection) adalah teknik yang digunakan untuk mengendalikan korosi pada permukaan logam dengan menjadikan permukaan logam tersebut sebagai katoda dari sel elektrokimia. Pada PT Pertamina EP Asset 2 Field Prabumulih digunakan sistem proteksi katodik arus tanding atau yang dikenal dengan ICCP (Impressed Current Cathodic Protection), dimana metode ini lebih efektif digunakan dari pada menggunakan metode anoda korban atau SACP (Sacrificial Anode Cathodic Protection). Proteksi katodik dianggap bekerja jika, potensial minimum adalah 850 mV, potensial maksimum adalah1.300 mV,range inilah yang dijadikan nilai oleh PT Pertamina EP Asset 2 Field Prabumulih terhadap pengukuran potensial pipanya untuk mencegah dari korosi. Umur pipa line SKG X – Cambai sendiri yaitu 40 tahun, maka dari itu pemilihan jenis anodanya harus mengikuti umur pipa tersebut supayalebihekonomisdanlebih efisien. Dalam perhitungan jumlah anoda,  PT Pertamina EP Asset 2 Field Prabumulih menggunakan 1 pcs anoda untuk memproteksi jalur pipa seluas area 19,33 m2. Adapun parameter-parameter keberhasilan dalam pelaksanaan sistem proteksi katodik ini yaitu tegangan yang dihasilkan tidak melebihi range yang ditentukan, yaitu 850 – 1.300 mV dan pipaterlindungi dari korosi.

Characteristic of CP Potential for Concrete Pile Specimen with Hybrid CP

2013 ◽  
Vol 685 ◽  
pp. 3-7 ◽  
Author(s):  
Jin A Jeong ◽  
Chung Kuk Jin
Keyword(s):  
Water Level ◽  
Cathodic Protection ◽  
System Application ◽  
Concrete Columns ◽  
Sacrificial Anode ◽  
Water Line ◽  
Concrete Pile ◽  
Impressed Current ◽  
Impressed Current Cathodic Protection

This study represents the result of hybrid cathodic protection (Hybrid CP) system application. Hybrid CP, which is the combination between sacrificial anode cathodic protection (SACP) system and impressed current cathodic protection (ICCP) system, can be optimum way to protect corrosion, especially in concrete columns. In this study, sections below a water line, i.e. submerged and tidal zones, were cathodically protected by means of SACP. In addition, ICCP was applied to the upper areas of water line, i.e. splash and atmospheric zones. Water level was changed to verify the effectiveness of hybrid CP system. The test factors were natural, CP, and 4-hour depolarization potential.

scholarly journals Comparative efficiency of different realization methods of cathodic protection for marine structures

2021 ◽  
Vol 225 ◽  
pp. 04001
Author(s):  
Boris Borisovich Chernov ◽  
Van Mung Vu ◽  
Anas Maskharovich Nugmanov
Keyword(s):  
Cathodic Protection ◽  
Offshore Structures ◽  
Battery Life ◽  
Sacrificial Anode ◽  
Solar Panels ◽  
Power Sources ◽  
Comparative Efficiency ◽  
Impressed Current ◽  
The Cost ◽  
Impressed Current Cathodic Protection

Economic efficiency in using the solar panels as the DC sources for the impressed current cathodic protection of offshore structures was compared with the sacrificial anode cathodic protection. The calculation was based on the example of a sheet pile wall with a surface area of 2000 m2 protected by various methods of cathodic protection: the impressed current cathodic protection powered by a rectifier device, by solar panels with batteries, by solar panels without batteries and sacrificial anode cathodic protection. The results showed that the cost of impressed current cathodic protection powered by solar panels without batteries is the lowest after 10 years of operation. Cathodic protection powered only by solar panels without batteries is the most beneficial in cold climates when battery life is reduced, and for facilities that are remote from centralized power sources, where the power supplying cost to the protected structure is difficult to estimate due to specific situations.

Sign in / Sign up

Export Citation Format

Share Document