我厂在七五年投用的12台球罐中,200米~3丙烯贮罐4台,400米~3液态烃贮罐8台,材料为16Mn 或15MnV。从80年5月进行开罐检查,至83年3月31日,共分三批进行开罐检测和修复。经有关安全部门验收,已有8台分两批准许投入运行。第三批4台400米~3球罐已于83年3月通过验收,准许投用。12台球罐共进行 X 射线拍片6827张,占焊缝总长的79.2%;返修补焊总长496.4米,占原有焊缝的17.9%,一次合格率达到98%。平均每台罐检测修复费用为9万元。共牦资110万元。经过两年多球罐的修复工作,有如下一些认识: In our company, the 12 tanks put into operation in 1975 have 4 sets of 200m ~ 3 propylene tanks and 8 sets of 400m ~ 3 liquid hydrocarbon storage tanks. The materials are 16Mn or 15MnV. From May 80 to conduct canning inspection, to March 31, 83, is divided into three batches of cans testing and repair. After the acceptance by the relevant security department, eight units have been put into operation in two batches. The third batch of 4 sets of 400 meters ~ 3 ball tank has passed the acceptance in March of 83, allowing to put into use. A total of 6,827 X-ray films were taken from 12 billiard cans, accounting for 79.2% of the total length of the welded seam. The total length of the repaired and welded steel was 496.4 meters, accounting for 17.9% of the original welded seam, with a pass rate of 98%. The average cost of testing and repairing each tank is 90,000 yuan. A total of 1.1 million yuan Yako. After more than two years of repair of the spherical tank, there are some understanding as follows: