International Journal of Marine Engineering Innovation and Research, Vol. 6(1), Mar. 2021. 1-10 (pISSN: 2541-5972, eISSN: 2548-1479) 1 Implementation of Risk-Based Inspection (RBI) in Condensate Separator and Storage Vessel: A Case Study Nurhadi Siswantoro 1 , Dwi Priyanta 2 , Jamal Ramadhan 3 , Muhammad Badrus Zaman 4 (Received: 21 August 2020 / Revised: 03 March 2021 / Accepted: 23 March 2021) Abstract⎯ in the processing of oil and gas, a pressure vessel is an important piece of equipment. It needs a method to prevent the failure of the pressure vessel. The Risk-Based Inspection (RBI) is a systematic approach to the inspection management method for equipment based on the level of risk. RBI is expected to provide sufficiently accurate recommendations to prevent equipment failures. In this research, the objects to be carried out are the 10V2102 condensate separator and the 10V2103 condensate storage vessel. According to RBI analysis, the risk category of the current RBI date is low risk for the condensate separator 10V2102 and condensate storage vessel 10V2103. Meanwhile, the inspection date of Condensate Separator 10V2102 is 2 April 2026 and 11 February 2027 for Condensate Storage Vessel 10V2103 and selected inspection methods are Visual Testing, Ultrasonic Testing (UT), Radiography Test (RT), Eddy Current Test, and Magnetic Particle Inspection. Keywords⎯ inspection, pressure vessel, risk, RBI. I. INTRODUCTION1 The pressure vessel is one of the important pieces of equipment in the oil and gas production process [1], [2]. In this research, the objects to be carried out are the 10V2102 condensate separator and the 10V2103 condensate storage vessel. Where the condensate separator is a vessel used to separate fluid and gas, the separated condensate fluid will collect at the bottom of the separator. The collected condensate is then transferred to the condensate storage vessel. Each pressure vessel has a production life that depends on the type and use of the pressure vessel itself [3]. If the operation continues beyond the proper age, it is feared that it can cause unwanted dangers. Therefore necessary a method to prevent failure of the pressure vessel [4]. RBI (risk-based inspection) is a procedure for determining when to inspect facilities based on the level of risk [5], [6]. As a result, the RBI's risk assessment is required to provide reasonably precise recommendations to avoid equipment failures. The Reserve Bank of India prioritizes and manages inspection patterns based on risk. In a system, it is common knowledge that there is a high enough risk to some of the small equipment [7], [8]. Inspection and maintenance can be improved on Nurhadi Siswantoro is with Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia. E- mail: nurhadi@ne.its.ac.id Dwi Priyanta is with Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia. E-mail: priyanta@its.ac.id Jamal Ramadhan is with Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia. Email: jamal.ramadhan116@mhs.ne.its.ac.id Muhammad Badrus Zaman is with Department of Marine Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia. E-mail: druz_zaman@ne.its.ac.id equipment that carries a high risk of failure [9-11]. RBI can determine the most optimum combination, including inspection method, scope, and frequency [7]. The RBI approach combines two parameters to determine the level of risk of the analyzed equipment: the failure probability and the failure consequences. The size of the probability of a piece of equipment failing is related to the analysis of the likelihood of failure. Meanwhile, the failure effects analysis is concerned with the effect caused by the failure event [12-15]. It is hoped that the RBI can provide a centralized damage mechanism analysis so that further consequences must be watched out for and prevented, as well as provide ideas for more effective and efficient inspections. The RBI makes it possible to revise the schedule and inspection intervals so that they are more efficient according to needs and of course this will save more costs for inspections. II. METHOD A. Data Collection The RBI assessment was performed under normal operating conditions. The object researches are the Condensate Separator 10V2102 and Condensate Storage Vessel 10V2103. The following data must be obtained in conducting an RBI assessment: • Type of equipment • Process Flow Diagram system • Piping and Instrumentation Diagram system • Materials and Construction • Previous Inspection Reports • Composition of Fluid Contained • Design and operation of the equipment • Safety System B. Previous Inspection Evaluation Inspections that have been carried out need to be analyzed, both the results are obtained and the