weeper 4

[teokal]

Hi to all,
English is not my mother tongue - although I think I can use it pretty well - but I am facing a language problem regarding a defect on a casted piece... The defect is called WEEPER. Does anyone know what exactly is this?
Thanks a lot in advance...

 

[Wecos]

I do not know if this is similar to your case, but when I was working on pressure vessels certain components had 'weep hole' that allowed fluid or air to escape. Your weeper may just be a flaw that extends completely through a wall.

 

[EdStainless]

These can be from a number of causes, depending on the alloy involved, the casting method, and section thickness.
The most common reasons include: inclusions, shrinkage defects, hot tears, and gas (bubble) defects.

In cases where castings must be pressure (or vacuum) tight they castings are usually tested and then sealed by forcing a resin into the voids.

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Plymouth Tube

 

[metengr]

These are through-wall defe4cts that results in the leakage of fluid under pressure. Depending on the service application of the casting, weeper defects can be "rejectable" defects. You need to review the material specification requirements for the casting.

 

[teokal]

thank you all...

 

[arunmrao]

Weeper is a new term for me. Thanks!. Perhaps you are all referring to secondary shrinkage or distributed porosity.which causes castings to sweat when tested under hydraulic pressure.

There is no way this can be salvaged except by hipping or vacuum sealing.

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