The reasons for the leakage of high-pressured ammonia pre-heater row tubes and seals were explained, and how to handle and prevent the occurrence of similar accidents was proposed.
分析尿素装置高压氨预热器多次发生列管及封头泄漏的原因，提出如何处理及防止类似事故的发生。
The reasons for the leakage of high-pressured ammonia pre-heater row tubes and seals were explained, and how to handle and prevent the occurrence of similar accidents was proposed.
综述合成氨二段转化废热锅炉失效历程分析 ，废热锅炉列管穿孔、管板泄漏及水压试验泄漏的原因 ，提出解决对策。
For carbon steel, stainless steel, plating steel and all kinds of non-ferrous metal rods, tubes, the sheet metal, screw the spot welding and welding until the row.
可进行碳钢、不锈钢、电镀钢及各种有色金属的线材、管材、板料，螺钉等到的点焊和排焊。
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