DESAIN DAN ANALISIS PROTEKSI KATODIK PIPA BAWAH LAUT DI SELAT MAKASSAR
Design and Cathodic Protection Analysis of Subsea Pipeline in Makassar Strait
Muhammad Arief Faishal1, Ricky Lukman Tawekal2, dan Jessica Rikanti Tawekal3
Program Studi Teknik Kelautan
Fakultas Teknik Sipil dan Lingkungan
Institut Teknologi Bandung
Jl. Ganesha 10, Bandung 40132
1arieffaishal249@gmail.com, 2ricky.tawekal@gmail.com, dan 3jessica.rikanti@gmail.com
Abstract: A subsea pipeline is one of the systems utilised by the oil and gas industry to transport and distribute fluids. However, these flowing fluids (such as oil and gas) can pollute the environment and potentially endanger human health. It is crucial to carry out various design and analysis steps so that the subsea pipeline can withstand loads and is feasible to operate. The design and analysis process includes selection of pipe wall thickness by the DNVGL-ST-F101 standard, selection of the concrete thickness by the DNV-RP-F109 standard, installation analysis by the industrial practical design criteria or the DNVGL-ST-F101 standard, and allowable free span analysis refers to the DNV-RP-F105 standard. In addition is cathodic protection analysis by the DNVGL-RP-F103 standard. In this study, the design and analysis of the subsea pipeline in the Makassar Strait were performed. The result is a wall thickness of 12.7 mm and a concrete layer thickness of 40 mm. Installation is carried out with the Timas DL-01 lay barge with the optimum configuration at a trim barge angle of 1.5º and a hitch of 0º. Furthermore, the allowed free span length is 10.762 m. Finally, based on the cathodic protection analysis, the required number of anodes is 1038 units, with a total anode weight of 32.6 tons and an average anode distance of every 24 pipe joint lengths or 292.8 m.
Keywords: subsea pipeline, wall thickness, on-bottom stability, installation, free span, cathodic protection, sacrificial anodes.
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