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Pump Casing Castings

Thread starter Rob100
Start date May 14, 2007

Status: Not open for further replies.

May 14, 2007

Rob100

Mechanical

I am reviewing specs for pump units for a water system. These are city water (potable water) and approx 50 mgd pumps. The casings are specified as DI or CI. Is there a quality standard for porosity and integrity of the casing? This is not a critical application so I don't think that I can probably use visual inspection methods. I am tying to define void size or porosity. Also, if the casing is cracked, I don't want this to be welded and ground unless I know the procedure and stress relief.
Also, the impellers are cast stainless steel. I have the same concerns.
Hopefully there will be no problems but I want to cover my bases if there are.