pump casting defects
pump casting defects
(OP)
how can casting of the pump bowl failed? what could have caused this? can this be repaired if there are any defects?
I am new and want to understand.
I am new and want to understand.
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RE: pump casting defects
1.Don't know
2.Again no idea
3.Maybe
You are a bit short on detail for any sensible answer.
What type of pump, what is the application, what type of failure what are the defects etc etc.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: pump casting defects
RE: pump casting defects
Patricia Lougheed
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RE: pump casting defects
RE: pump casting defects
What could have caused this? Any number of things, you would really have to take a course on casting.
Can it be repaired? Depends on what the problem is, where is it is in the casting, what the material of the bowl is, etc.
RE: pump casting defects
some may just be cosmetic. depends also on customer's requirements.
RE: pump casting defects
These casing defects on impellers and bowls were only visible after machining.
The vendor has been using the same foundry for about 10 yrs and this is the second time it happen over a short period of time.
i attached the picture.
RE: pump casting defects
If this is the first (or second) problem they've had in ten years just chalk it up to percentages and move ahead.
If these pumps are sea water lift, they may be nickel aluminum bronze?? Not the easiest alloy to pour.
If these pumps are super critical to you, then you should ask for (and pay for) radiography testing on the cast parts.
RE: pump casting defects
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: pump casting defects
RE: pump casting defects
Another solution is a hotter melt, but then the material is more likely to take on hydrogen and you'll get gas porosity. Gas porosity is less of a problem. but ultimately it depends on the specification issued to the foundry.
RE: pump casting defects
Porosities like this don't necessarily mean the part is junk. I suggest hydro-testing any pressure boundary parts.