Lee, S.
Sang-Mo Lee has more than 26 yr of experience as a Fixed-Equipment Engineer at SK Energy. His main tasks include root cause analysis (RCA), troubleshooting, fitness-for-service (FFS) evaluation, maintenance procedures and technical support for the refining and petrochemical business. He earned a BS degree in mechanical engineering, and is qualified as a professional engineer for welding and metallurgy by the South Korean government.
Case study: Why did the tube sheet of the waste heat boiler deform?
This article analyzes the causes of a 19-mm protrusion of the tube sheet and the tube joint leaks that occurred within a sulfur recovery unit (SRU) waste heat boiler (WHB).
Case study: Causes and countermeasures of a wall tube leak accident by an SNCR solution of a CO boiler in an RFCC process
Residue fluid catalytic cracking (RFCC) is a process that cracks heavy oil into light oil, such as gasoline, with zeolite catalysts.
Case studies: Evaluation of the soundness and remaining life of PSA vessels with weld defects
Multiple defects were found in pressure swing adsorption (PSA) vessels during an outage of one of four PSA process units.
Stability evaluation of hot spots in the RDS process reactor
During the end-of-run (EOR) period of the authors’ company’s residue hydrodesulfurization (RDS) process in early February 2019, some hot spots occurred in the catalysts of the reactors.
Case study: Extend tube life in a waste heat boiler
The sulfur recovery unit (SRU) separates sulfur from sulfur compounds.
Application of ring-type joint gaskets in a refinery
In refineries and petrochemical plants, ring-type joint (RTJ) flanges have been applied to high-pressure processes or sensitive areas that are susceptible to leaks.
Three topics for operational excellence related to a Cr-Mo hydrotreating reactor
Many end users are trying to use feedstock with higher sulfur content for their refineries to increase profitability, but numerous unknown or plausible bottlenecks exist.
Determine the standard hoop density of spiral-wound gaskets on flanges
The use of spiral-wound gaskets on flanges has resulted in good sealing performance. However, most gaskets do not perform well when the flange is improperly installed.
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