该焊机已成功地应用于锅炉封头相贯线接缝的自动焊接生产中。
The welding machine has been successfully applied to the automatic welding production of end for boiler.
本文介绍了大型燃油锅炉经拼板焊接和冷旋压加工制造而成的平管板封头残余应力试验。
This article introduced the experiment of residual stress in flat tubeplate head of large scale fuel boiler that was manufactured by cold rotary extruding and butt weld.
根据材料的第三、第四强度理论，本文讨论了锅炉下封头的安全性。
Finally, the safety of the boiler is estimated according the 3rd and the 4th strength theory of material.
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