Heat exchanger welding issues
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I would like to ask everyone**, what material is used for welding when manufacturing heat exchangers? For example, what material should be used and how should it be welded when connecting flanges to the cylinder?
It depends on the specific material of which the heat exchanger is made, as well as the medium used for heat exchange..
For the cylinder, end caps, and flanges, 20R material is used, with circulating water cooling and kerosene as the cooling medium. What I would like to know is whether there are any specific standard regulations regarding this – for example, regulations stating that this material should be welded using XXX
Welding rod selection software – I just uploaded it; I hope it can help you! http://bbs.hcbbs.com/viewthread.php?tid=415163&extra=page%3D1&frombbs=1
I don’t know how to choose the material for the welding rod! Things like how to weld between the cylinder body and the flange – is it all made of 20R material? What welding rod to use?
If both the cylinder and the flange are Q235B, or 20, 20 forged, then J427 is used for 20R； If the cylinder and flange are 16MNR and Q235B or 20, use J427 ； If both the cylinder and the flange are 16MNR, use J507. If both the cylinder and the flange are 18-8, or one is steel, use A022 welding rod.
It’s better to study JB/T4709-2000.