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桥电六期１２５ＭＷ 机组锅炉系上海锅炉厂生产的蒸发量为４２０ｔ／ｈ 汽包自然循环炉，它的高温再热器管采用美国的新型耐热钢ＳＡ２１３ － Ｔ９１ 与低温段珠光体耐热钢１２ＣｒｌＭｏＶ进行焊接，其焊接难度大，易出现各种缺陷。通过不同３ 人横焊、斜焊、吊焊９ 种焊接试样的金相分析，结果只有１ 人的横焊样熔合线附近有缺陷产生，经过研究分析找出了缺陷产生的原因，即焊工焊接时操作不当，加热温度过高、冷却速度过快等。通过分析确定了这种焊接工艺的可行性和可靠性，为桥电六期的顺利完工提供了保证。
Bridge Electric six boiler unit of the 125MW unit in Shanghai Boiler Plant evaporation of 420t / h steam drum natural circulation furnace, and its high temperature reheater tube using the United States of the new heat - resistant steel SA213 - T91 and low temperature pearlite heat - resistant steel 12CrlMoV for welding, the welding difficulty, prone to various defects. Through the metallographic analysis of 9 kinds of welding samples of 3 people in horizontal welding, oblique welding and hanging welding, the results showed that there was a defect near the welding line of horizontal welding with only one person. After researching and analyzing, Welding improper operation, heating temperature is too high, too fast cooling and so on. The feasibility and reliability of this kind of welding process were confirmed through analysis, which provided a guarantee for the successful completion of the six phases of the bridge.