CATHODIC PROTECTION DESIGN FOR GAS PIPELINE BASED ON NACE STANDARD

• Main Author: HERDIYANTO (NIM : 13707049); Pembimbing I : Prof. Dr. Ir. Rochim Suratman; Pembimbing II Pro, PRAYUDI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16845
• Institution: Institut Teknologi Bandung

Distribution of oil and gas in the world majority still used pipeline, especially buried pipeline. Buried pipeline has the greatest challenges in its operations, that is the problem of corrosion, which could affect the integrity of the pipeline. Corrosion in the pipeline should be controlled, method of corrosion protection on the pipeline which is often used is galvanic anode and impressed current, protective coating, inhibitors, and anodic protection. The main purposes in this final project is to design cathodic protection against corrosion in gas pipelines onshore and offshore using sacrificial anode, which is based on NACE (National Association and Corrosion Engineers) standard. Gas pipeline which is used as a case study in this final project is a gas pipeline from the Bunyu Island to Simenggaris Island in East Kalimantan, along the 63 km, onshore and offshore.The design result in this final project, with a design life of 25 years demonstrate the need for the number of MMO titanium anoda to impressed current method of Simenggaris to Tapa Island as many as 22 pieces, required 81,63 V rectifier voltage, for Mintut to Bunyu island is needed 18 pieces, 66,93 V rectifier voltage. For the galvanic anode method (offshore pipeline) with the type of aluminum bracelet anodas require as many as 167 pieces of anoda, and the total anoda weight of 3996,42 kg. In the design of cathodic protection there are several parameters that must be considered in detail, such as current density, quality of coating, anoda resistance, etc. The task of these final project also developed a calculation sheet which is useful for calculations to be more easy.