석유화학 플랜트 수소 배관설비의 용접부 비파괴 검사를 통한 안전성 평가

Abstract

Among the various fields for securing the safety of a petrochemical plant, facility safety management is one of the very important parts. In general, piping equipment of a petrochemical plant is determined to continue use through risk assessment and sample inspection, but studies on whether this method is suitable for the safety of long-term plant is very insufficient. This study focuses on how to verify the integrity of equipment by conducting non-destructive inspection of welded parts of hydrogen piping equipment used for a long period of time. Radiographic Test (RT) method was applied to a process built in 1990 producing paraffin from kerosene. In summary, 2.8% of inspected welding points were found to be inadequate and independent service pressure. Most of the defects were found at the pipeline less than 2 inch diameters. Through this study, potential problems in welded parts of hydrogen piping equipment of a petrochemical plant in long-term use were confirmed through empirical non-destructive testing. Based on these results, six plans for piping facility management to secure fundamental safety of petrochemical plants were presented. Based on the results of this study, it is intended to be of great help in establishing the policy and direction of facility management to ensure the fundamental safety of welded parts of hydrogen piping facilities used for a long period of time.