How to handle extremely severe service conditions?

Manoir Industries, pioneer of heat-resistant steels for petrochemical industry.

Cracking of ethane, and reforming of methane, are at the basis of many chemical processes. They are indeed at the origin of the plastics and fertilizers industries. For these reactions to occur, a process gas has to be heated above 700°C in a reactor. For decades, Manoir Industries has supported the main actors of these chemical process industries in the design and manufacturing of the reactors which consist of steel tubes and fittings. And one of the main pioneering role of Manoir Industries has been the grade development, through proprietary alloys named “Manaurites®”. [click here for more information]

The reactors, furnace coils for ethylene industry, or catalyst tubes for steam-reforming are designed to withstand high temperature and high pressure within a corrosive environment. Just like the widely used standard stainless steels, 304 or 316 grades, heat-resistant steels for petrochemical industries are mainly made of chromium, nickel and iron but with much higher chromium and nickel contents. Chromium will strongly contribute to their superior oxidation resistance while nickel will allow to maintain the necessary stability of the austenitic structure of the grade, strongly contributing to their high-temperature strength.

Manoir industries has always been a pioneer in the development of heat-resistant steels in order to reach higher material performances. This continuous development has started in the late 1960’s with the addition of niobium within ASTM HP grade, leading to widely known HP-Nb material (patent US 3.627.516). In the 1980’s, Manoir’s metallurgists went a step further by opening the era of micro-alloys: Manaurite® XM, which basically stands for HP-Nb-Ti, was born. In the meantime (1970’s), Manoir Industries research center also developed a grade specifically dedicated to lower temperature transition pieces, Manaurite® 900 ( low C 20Cr32NiNb). These grades, developed by Manoir, have now become the standards within the industry. Today, Manoir’s catalogue of proprietary materials contains more than 20 different Manaurites®. They represent part of Manoir’s pride since they are at the origin of Manoir’s reputation. Yet, many other breakthroughs have occurred and will continue to occur since innovation is part of Manoir’s DNA.

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