... Water, Mineral Oil, Salinous WaterEPDM-25~+180° CHot Water, Steam, Acid, AlkaliF26-55~+230° CAcid, AlkaliTPF0~+160° CHigh ... Concentrated Acid, Alkali, High temperature Oil, Steam Working principleChannels are formed between the plates and the corner ... of shell-and-tubesNo thermal fatigue Cyclic heating and cooling produces thermal fatigue in rigid steam heaters like straightshell-and- ...