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Old 11-04-2012, 08:49 PM   #1
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The 6" supply pipe for water tower split on its seam. We replaced 7' section of the pipe that looked questionable. The inside of pipe had "saplings" growing in crevices. Any idea of how much of the plumbing I need to worry about?

It is a "sealed" system with chemical treatment, this section of pipe is seven years old. Again I am in my first year of work.

Btw the entire control system is pneumatic, with 40% of the connections disconnected.... I was looking for a job I could learn from, I think I found it lol


Cooling tower plumbing-image-4177536572.jpg

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Old 11-04-2012, 08:56 PM   #2
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That looks like it froze and expanded and cracked it right along the seam in the pipe.
What kind of pressure is that under when it's running?
May want to concider SCH. 80 seamless pipe.

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Old 11-04-2012, 09:02 PM   #3
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It had heat stripping connected since I started, as I found out removing the insulation. I don't believe it was ever disconnected.
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Old 11-04-2012, 09:03 PM   #4
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Sch. 80 was suggested and denied. I have a feeling I'll get more 11pm calls lol
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Old 11-04-2012, 09:12 PM   #5
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There's a whole science to grades of steel pipe. You may get lucky on here and find someone that could suggest something.
http://www.worldofsteel.com/resources/steel_pipes.html

I'm not even see where that pipe was ever mig welded. looks like it was just rolled and induction welded.
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Old 11-04-2012, 09:19 PM   #6
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I appreciate all of your assistance sir, and the tips I have learned from your other post.
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Old 11-04-2012, 09:24 PM   #7
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There's a whole lot of way smarter then me on this site so I'm pretty someone will come up with an idea.
(oh poop did I just say that out loud, LOL)

Many many moons ago I was in machine repair and had to come up with quick fixes all the time on jobs like what your stuck with.
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Old 11-05-2012, 02:55 PM   #8
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However much came out of that same batch lot. Looks like a quality control defect.
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Old 11-05-2012, 06:35 PM   #9
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Could be many reasons for the failure, defect in pipe from factory, freezing condition.
If it is equipped with heat tape then your in a cold weather environment, the heat tape could have failed no one noticed and water in the pipe expanded the pipe and the seam split. Of course it would take freezing conditions for quite a while to freeze that 6" round pipe. mostly all the cooling towers I worked with ran with minimal pressure because the chiller shells weren't built to withstand high pressure plus there's usually a bypass system involved. (Unless the controls didn't work)
If there's plant growth involved the entire system needs to be cleaned including the chiller condenser tubes. The end bells must be removed and the tubes wire brushed. Get ready for some serious work.
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Old 11-05-2012, 08:04 PM   #10
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I am actually in a southern state, record low was around 6 degrees C in the last five years. You are correct on the pressure, we run around 12-13 psi. Are you talking about the multi-stack strainers or actually unsweating tubes to clean?
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Old 11-05-2012, 08:25 PM   #11
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I didn't mean Celsius...
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Old 11-06-2012, 05:42 AM   #12
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Need pictures of the chillers to determine the process. All strainers must be cleaned initially and on routine schedule when the system is put back on line. You shouldn't have to unsweat anything.

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