TFMII-204型锅炉燃用含硫重油时,过热器和再热器出口段管出现严重的腐蚀现象。两过热器出口段均用X18H12T钢管制造,并以立式管屏形成安装在水平烟道内。过热器管φ42×7mm,再热器管φ60×5mm。把两过热器出口段管子组合成若干管屏,过热器每屏由五根管组成,再热器每屏由六根管子组成。按蒸汽流程,屏的最末蛇形管称为屏的末端管。对过热器和再热器出口段管子表面进行详细检查和测量壁厚的结果表明,距炉顶 TFMII-204-type boiler burning sulfur-containing heavy oil, superheater and reheater outlet section of pipe serious corrosion phenomenon. Two superheater exit section are made of X18H12T steel pipe, and to form a vertical pipe installed in the horizontal flue. Superheater tube φ42 × 7mm, reheater tube φ60 × 5mm. The two superheater exit section pipe combined into a number of tube screen, superheater each screen consists of five tubes, reheater each screen consists of six tubes. According to the steam flow, the last serpentine tube of the screen is called the end tube of the screen. The superheater and reheater exit section of the pipe surface to conduct a detailed inspection and measurement of wall thickness results show that from the roof