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1 情况简介该省煤器集箱设计压力:P=31.8MPa:设计温度:t=290℃;工作压力:Pg=29.3MPa;集箱本体材料为SA-106C;规格φ360mm×75mm;在每个集箱上共布置了1068只规格为φ42.7mm×6.3mm的SA-210C短管接头。有2个集箱在最终热处理后的磁粉检查时,共发现380只管接头出现裂纹。其中01集箱180只,02集箱200只。裂纹均处于集箱本体与角焊缝的熔合线处。
1 Brief introduction The economizer header design pressure: P = 31.8MPa: design temperature: t = 290 ℃; working pressure: Pg = 29.3MPa; header body material is SA-106C; specifications φ360mm × 75mm; in each A total of 1068 on the header layout of the specifications of φ42.7mm × 6.3mm SA-210C pipe joints. A total of 380 pipe joints were found cracked with 2 headers after the final heat treatment. Of which 180 180 boxes, 02 sets of 200 boxes. Cracks are both at the fusion line of the header body and the fillet weld.