Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Abstract

Heat exchangers, crucial equipment in oil and gas refinery facilities, play a pivotal role in ensuring reliable energy production. Any structural issues with these heat exchangers can disrupt production and potentially lead to energy supply interruptions. The aim of this research is to investigate the degradation of structural strength in heat exchangers that occurs during their operational lifespan. Several tests, including hardness, metallography, chemical analysis, tensile testing, and SEM analysis, were conducted to assess the condition of the heat exchanger tubes. The results revealed that the tubes had become coated with deposits that reacted with the tube walls, resulting in rust formation. Consequently, the walls of the tubes underwent thinning, ultimately leading to leaks. In conclusion, the structural strength degradation of the heat exchanger tubes was primarily caused by corrosion occurring beneath these deposits.