The paper analyses the reason of leakage based on material, struction and welding of tube bundle, and gives some solution methods.
分别从材质、结构、焊接方式上进行了分析，从而找出其中的原因及解决办法。
2
In addition, the metal body within welding heat effect zone will produce a lot of micro-cracks because of infiltration of solid solution nitrogen in course of porcelain spraying.
此外，喷瓷管道焊接热影响区的金属基体将由于喷瓷过程中渗入的固溶氮而产生大量微裂纹。
3
The corrosion rate of the welding seam was accelerated by increasing the temperature and concentration of the solution.