【Haichuan Pipeline Construction】What are the reasons for consecutive pores in pipeline submerged arc welding?
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This post was last edited by Desert Fish on 2021-11-10 at 15:07. What causes a series of pores in submerged arc welding of pipes? Images sourced from the Internet
It seems to be due to hydrogen; hydrogen is caused by the moisture in the welding materials and base metal that enters the arc zone.
Are the pores dense because the welding rod wasn’t dried properly? I don’t quite understand
In submerged arc welding, air currents can easily cause porosity; improper reuse of flux along with mixing it with newly used flux can also lead to such issues
【Haichuan Pipeline Construction】Series of summary posts https://bbs.hcbbs.com/thread-3272979-1-1.html (Source: Haichuan Chemical Forum)
The welding flux is too moist and has clumped together； The added reclaimed solder flux contains too many impurities. Affects arc stability