A detailed failure investigation into the cracking of ethylene furnace radiant tubes included visual, fractographic, metallographic, scanning electron microscopy/x-ray spectroscopy, and hardness and chemical examinations. These analyses showed that the tube crack was initiated by thermal shock, accompanied by restrained thermal expansion due to internal coke layer formation. Details of the failure’s contributing factors, and recommendations to avoid similar failures, are shared here.
Frequent failures of the waste spray nozzles in incinerators result in accelerated degradation of the refractory lining, requiring unscheduled shutdowns for repairs. A study was carried out to identify the factors that contributed to the nozzle failure and to prevent the reoccurrence of similar failures in the future.
Boilers are used in petrochemical facilities to generate steam that can be used to meet process and utility requirements. Many industrial boiler designs can be shop assembled and are therefore referre..
A first-stage impeller in a synthetic gas compressor failed after 20 years of service. The compressor is a six-stage centrifugal compressor driven by a steam turbine. This case history discusses the i..
Graphitization occurs in carbon steel (CS) reactors in high-temperature service (> 455°C). As discussed in this case history, the shell of a methyl tertiary butyl ether (MTBE) reactor became s..