نوع مقاله : کاربردی
عنوان مقاله English
نویسندگان English
In the crude oil preheat network of the Shiraz refinery, the tube bundle of a heat exchanger that uses gasoil to raise crude oil temperature has been replaced several times due to corrosion. Naphthenic acid and chloride are widely recognized as dominant corrosive species in crude oil refining processes. Using HTRI simulation, the skin temperature of the tubes in heat exchanger tube passes were calculated. Then, an assessment was conducted to determine whether the HTRI-calculated temperatures overlap with the naphthenic acid corrosion susceptibility range defined in API 581. According to API 581 standard, 316L stainless steel containing at least 2.5% molybdenum is recommended for heat exchanger tubes to improve corrosion resistance. Molybdenum stabilizes the protective layer and increases the resistance to pitting corrosion.
کلیدواژهها English
