二滩水电站已全部投运的6台机转轮经停机检查，现场焊接的主焊缝无裂纹。
The runners of 6 operated generating unit of Ertan Hydro Station have been checked and no crack on the primary weld of the field welding position is observed.
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
研制的容器主焊缝埋弧焊材与国外典型的埋弧焊焊材在焊接工艺性能和熔敷金属力学性能及纯净度方面对比，结果表明研制焊材与日本神户制钢所的US-521HD／PF-500D焊材相当。
The weldability, deposited metal's mechanical properties and purity of the new developed shell butt welding SAW material as the same level compared with Kobe Steel US-521HD/PF-500D.
第二种是产生于立柱翼缘与主梁翼缘连接处的坡口焊缝焊趾处的裂纹。
The second crack is a crack originating at the groove weld toe of the column flange-girder flange connection.
结果表明，该主蒸汽管道的弯头、焊缝热影响区和三通等部位石墨化严重，部分部件需要更换。
The results show that the graphitization of the bent, HAZ and tee of the main steam pipeline stand is severe, and the relevant components should be replaced.
结果表明，该主蒸汽管道的弯头、焊缝热影响区和三通等部位石墨化严重，部分部件需要更换。
The results show that the graphitization of the bent, HAZ and tee of the main steam pipeline stand is severe, and the relevant components should be replaced.
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