Best material to use for Water Inlet Screen?
Best material to use for Water Inlet Screen?
(OP)
Customer does not want to use stainless anymore. Something in the water chemistry is deteriorating the stainless. Is HDMW or HDPE a good choice for a screen that will be for the most part submerged underwater? Do I have to worry about hydrolysis with these materials? It could be any size panel....I have to cover a 8 foot wide by 24 foot high area.





RE: Best material to use for Water Inlet Screen?
Alternatively you could use titanium or cupro nickel.
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His Holiness the Dalai Lama.
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RE: Best material to use for Water Inlet Screen?
Plastics are totally unsuitable for this application from strength of materials standpoint.
These screens are also made from self cleaning wire shapes that are not possible with plastics.
RE: Best material to use for Water Inlet Screen?
First check the water chemistry and then select the material. You may be able to find a screen manuafacturer who uses GRP. It depends on the screen aperture you are looking for. google wedge wire screeens sea water and see the supplier. Wedge wire can be in flat panels or circular screens.
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http://www.amistco.com/waterwell/industserved.html
http://www.federalscreen.com/
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/
RE: Best material to use for Water Inlet Screen?
RE: Best material to use for Water Inlet Screen?
If the water is chlorinated, the moist chlorine fumes above the water level will attack SS screens.
Muncipal water treatment plants at one time used 304L stainless steel pipe and the exterior of the pipe was being attacked by the moist chlorine fumes in the air. The engineers then went to using 316L SS because it has a higher resistance to chloride attack. The key however is to make sure the 316L piping has a 2B finish. If you have piping that has a polished #4 finish, for example, the 316L SS will have corrossion resistant properties LESS than that of 304L!!! That is why you see POLISHED 316L SS electrical control panels rusting in water treatement plants!!!
RE: Best material to use for Water Inlet Screen?
I would alos be wary of electrical cabinets claiming to be made from 316L SS. Without a materials cetificate I would challenge that it wasnt in a lower corrosion resistance type. Material certificates are rarely asked for when it comes to cabinets.
I have seen a major equipment manufacturer supply mining equipment claiming it was 316 ss. Even he had certificates. When tested it turned out to be 304ss.
If it rusts and it should not then have the material tested and keep your lawyers phone number nearby.
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/