May 2014

Special Report: Maintenance/Reliability

Micro-alloyed steel: New standard for reformer tubes

Reformer furnace tubes are designed to operate under high temperature and pressure. Historically, these tubes exhibit improved creep resistance at higher temperatures. The improvements in creep resist..

Reformer furnace tubes are designed to operate under high temperature and pressure. Historically, these tubes exhibit improved creep resistance at higher temperatures. The improvements in creep resistance are directly attributed to micro-alloying elements that combine with the carbon in the tube metallurgy to form carbides. These carbides strengthen the tube metallurgy and limit creep deformation. Present and future developments in heat-resistant alloys are discussed in this article. Background In the production of syngas, methanol, ammonia or hydrogen, the steam-reformer furnace is the heart of the process. The furnace reformer tubes are designed with a minimum service life of 100,000 ho

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