Regarding the repair of the pump casing
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The cast iron pump casing has been cracked due to pipeline vibrations; the gap is 3 mm – can it still be repaired? The length is about 100 mm, I guess
It’s probably due to the forces exerted on the pipes during installation, right? Cast iron is not weldable; cracks occur, and stress concentration is inevitable. There’s no better solution – one has to replace the casing or adjust the pipes
Cast iron is not very expensive, but it has poor weldability; welding it is costly, and the quality of the welds may not be good. It’s better to use something else. If using another material, it’s necessary to eliminate pipe vibration
Since it is cast iron, its value is not high, and the cracks are deep and long; these are only visible damages – there may be even deeper cracks inside. There is no need to repair it. Cast iron also has poor weldability and tends to crack easily.
Cast iron is not valuable. . It’s not worth fixing. . It’s costly and not safe. . . Change it
If you really need to repair it, use cast iron welding rods to weld it first as a temporary solution; in the meantime, buy a new pump casing as a backup.
Fix the pipeline vibration issue first; otherwise, similar problems will occur again after replacement!
If you want to do a temporary fix, you can also use metal epoxy glue to seal the leak.
Cast iron is not easy to weld. Furthermore, does the depth of cracking in the cracks affect the fit of the internal components? In that case, even if the exterior is welded properly, it still has an impact on the pump’s performance
Theory isn’t as strong as theirs; I only talk about practical things. . . I’ve actually done this before; the client was too stingy – one unit was kept as a backup while the other was in use. When one of them broke down, there were no spare parts available, and then the pump body of the other unit suddenly cracked ； You must find a way to weld it so as to keep production running without interruption. As for how long it will last without breaking, that’s not your responsibility. This mainly tests the skill level of welding, but no one can guarantee how long it will endure; generally, it should be fine until a new pump casing is available ； If you want to weld something well and use it for a long time, you’re crazy. . .