This paper reviews and compares various materials options for hydroprocessing reactor etlluent air coolers and piping. Cost data on piping, fittings and tube materials, and total installed costs for fabrication are included, The economic impact of special materials and design requirements are discussed along with details on welding and nondestructive testing specifications.
Keywords: hydroprocessing, hydrocracker, hydrotreater, eflluent, air cooler, piping, ammonium bisulfide corrosion, carbon steel, duplex stainless steel, alloy 800, alloy 825