某厂一台13吨/时、15大气压日立出品的蒸汽锅炉,在 1946年冬季停炉时,因炉水未放尽而将中部水鼓冻裂,冻裂部位是接缝垫板处,全长 1142公厘,最宽处是100公厘。冻裂部分在1947年用直径 330公厘厚 9.5公厘的无缝钢管剖开并稍加平直后从水鼓内侧将裂口复盖焊接,由于当时使用的是旧铁丝自制的焊条,质量不好,经常漏水。1952年又在原焊缝上加焊一次,并将邻近焊缝的铆钉从内侧焊死。 A factory of 13 tons / hour, 15 atmospheres Hitachi produced steam boilers, the winter shutdown in 1946, due to the furnace water is not exhausted and the Central Water Drum cracking, frozen fracture site is at the gasket plate, all 1142 mm long, the widest point is 100 mm. In 1947, the cracked part was cut open with a seamless steel tube of 330 mm in diameter and 9.5 mm in thickness and slightly flattened to cover the crack from the inside of the water drum. Since the old wire was used at that time, the quality was not good Good, often leaks. In 1952, welding was once again added to the original weld and welding rivets adjacent to the weld were welded to the inside.