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Home2020March 2020Case study: Extend tube life in a waste heat boiler

March 2020

Maintenance and Reliability

Case study: Extend tube life in a waste heat boiler

The sulfur recovery unit (SRU) separates sulfur from sulfur compounds.

SK Energy: Lee, S.  |  Kim, E.
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The Authors

Lee, S. - SK Energy, Ulsan, South Korea

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.

Kim, E. - SK Energy, South Korea

Eunho Kim is a Junior Engineer on the Stationary Equipment Engineering team at SK energy. He is in charge of the FCCU, and has 5 yr of experience in detailed design and maintenance of equipment. He earned a BS degree in mechanical engineering from Inha University in South Korea.

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Comments

Comments

Kasturi • 4/1/20 6:11 AM
Nice
Robert Burlingame • 3/30/20 1:29 PM
I have designed lots of WHB in my carreer. For this type of boiler, you should not use a low quality seal weld and tube expansion. Instead you should use a full depth strength weld. You provie a J-groove at the tubesheet joint and fill the groove with weld metal. This would provide a connection when most of the tube metal has corroded and will greatly extend the life of the boiler. All WHB famricators are familiar with this procedure. It is quite a bit more expensive that a low quality seal weld, but is worthwhile, since it will more than double the life of the boiler.
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