Screen for Sea Water Intake

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clperera Commentator Join Date: May 2010 Posts: 63	Screen for Sea Water Intake 05/30/2011 7:44 AM
	Our fire water is taken from the sea and the suction lines of 12" diameter are cabon steel with cement lining. We are replacing the submerged sections of these lines and are looking at installing a screen at the end of the pipe which is under water to prevent sand and other matter getting sucked in. What is the best material for this screen , what mesh size to use and how to attach it onto the end of the 12" line. Thanks in advance.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Screen for Sea water intake 05/30/2011 10:02 AM
	Not much has changed since you sent this: Mesh For Sea Water Suction Line
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CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#2 Re: Screen for Sea water intake 05/30/2011 10:15 AM
	You may want to look into utilizing either HDPE-based or copper/bronze-based intake screens to minimize mussels attachment to the screens and inside of your intake pipe. Also look into lining your intake pipes, valves and appurtenances with likewise materials because mussels and their larvae can attach to untreated intake piping etc. Do a Google search regarding intake performance and related scientific testing of mussel repellance......it is invaluable information! There is a lot of information available, especially with testing materials to repel Zebra Mussels. Screen size and opening size will be dictated by hydraulic properties, such as the water flow rate and inlet velocities. You must check with the individual screen manufacturers and review their technical data as well as independent (meaning un-bias) testing agency/laboratory testing reports. Good luck! __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#3 In reply to #2 Re: Screen for Sea water intake 05/30/2011 10:20 AM
	appurtenances? Now there's a word you don't run across every day.
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CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#4 In reply to #3 Re: Screen for Sea water intake 05/30/2011 11:23 AM
	Ahhhh, it's my favorite "catch-all" word, yes that one is! I failed to mention in my previous posting that it's imperative to install (and utilize) a air or and/water blow-back system to rid the build-up of critters and sand from the intake screens and inlet piping. Also, Potassium Permanganate (KMnO4) solution injected at the inlet works wonders too warding off mussel infestation....ditto with injection of a strong Chlorine solution, such as Chlorine Dioxide. Remember the troops today.....those that have fallen, the Veterans, and those currently serving! __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#5 In reply to #4 Re: Screen for Sea water intake 05/30/2011 11:28 AM
	Yes, of course. Hats off to those who have, and will serve our country.
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Out of Box Experience Guru Join Date: Jun 2007 Location: Eden Posts: 1476 Good Answers: 39	#6 In reply to #2 Re: Screen for Sea water intake 05/31/2011 2:27 PM
	Sounds like you have some experience with, and a fondness for, those lovable Zebra Mussels, Capt.
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