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Why I'm back to work!!

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Grand Poobah
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fl Inboards Quote  Post ReplyReply Direct Link To This Post Topic: Why I'm back to work!!
    Posted: April-30-2015 at 12:58pm
That was a wast of a Min and four seconds! I thought I was gonna see some kind of explosive machine destruction!! What a let down!
Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.




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Post Options Post Options   Thanks (0) Thanks(0)   Quote Toertel Quote  Post ReplyReply Direct Link To This Post Posted: April-30-2015 at 11:37am
I hate to say this but I think he was in Australia...btw it's been a while since I saw him on CCF.
Guess his sucker punching bride has him on a tight leash 😜
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Donald80SN Quote  Post ReplyReply Direct Link To This Post Posted: April-30-2015 at 10:50am
The insurance company should be asking: " Was Adam at the Plant when the Pipe Blew apart?"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: April-28-2015 at 9:19am
Brian are you proposing a theory that just the mear mention of you know who can cause something to break as opposed to you know who actually having to be at the place in question?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bri892001 Quote  Post ReplyReply Direct Link To This Post Posted: April-28-2015 at 9:11am
Originally posted by 8122pbrainard 8122pbrainard wrote:


...blew a 2" hose off a barbed fitting inside ... blow .... the pump sensing the lack of pressure... .far exceeding the 5 FPM recommended velocity...to the blow...and slammed the ball valves... This caused a ...hammer (seen in another video).. ran back to ... pump ... loop that blew.... 7 blow .... (yup, HEAT!) ... pump skid, ... bladder expansion...


This all sounds very complicated.

But, I do believe it was similar circumstances that caused Adam's Aero Bed to fail during the 2014 CT Mini Reunion.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: April-28-2015 at 12:27am
Gary,
We had all the plant running within about a week. We brought in 4 temporary chillers, wired them temporarily, laid sch. 10 pipe on the floor hooked up with Victaulic fittings and then hosed to the molders. We are now trying to get clearance from the insurance company to proceed with repairs since it's getting a little warm in the plant. 350 tons of air cooled chillers dumping their heat inside will do that! This time of the year is very busy for us. 24/7 running gas,diesel and kerosene cans. When I started 3 years ago, I had never seen so many. It still amazes me where they all go!!


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: April-28-2015 at 12:12am
So is the whole plant shutdown or are some people still working in other areas Pete?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: April-27-2015 at 9:25pm
Originally posted by 63 Skier 63 Skier wrote:

   You mention this is cooling water. Doesn't your PVC end up looking like spaghetti after a while? I found anything above about 80-90 F and over time, even with closely spaced hangers, the pipe would droop a bit. Didn't seem to affect function at all, just looked sloppy. Maybe we used the wrong type of sch. 80.

Dave,
The set point on both chillers is 42 F. I've never seen return temps over 50 F. The sch. 80 with hangers not exceeding 6', we don't have a problem.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote 63 Skier Quote  Post ReplyReply Direct Link To This Post Posted: April-27-2015 at 8:12pm
The slammed shut valve is exactly why systems like that fail! Not uncommon, and I'm surprised those 3 mechanical contractors don't install some sort of relief. It's a few years now but I think the type we were using were Spence valves, and rather than just a pop off it actually regulated line pressure and bled off excess pressure back to the holding tank. Completely reliable and line pressure only varied by a few psi as valves were opened and closed. Of course the feed pump had to be big enough to maintain pressure with everything open, so with that rarely the case there was almost always bypass water flowing.

You mention this is cooling water. Doesn't your PVC end up looking like spaghetti after a while? I found anything above about 80-90 F and over time, even with closely spaced hangers, the pipe would droop a bit. Didn't seem to affect function at all, just looked sloppy. Maybe we used the wrong type of sch. 80.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: April-27-2015 at 7:53pm
Dave,
Here's my take on the incident: We blew a 2" hose off a barbed fitting inside one of our blow molders. The VFD on the pump sensing the lack of pressure ramped up to the max of 60hz. far exceeding the 5 FPM recommended velocity. Then one of our workers ran to the 3" PVC drop from the main to the blow molder and slammed the ball valves closed. This caused a water hammer (seen in another video) that broke the 3" off the 8" main south loop. Now the "fire drill" started!! Maintenance ran back to the pump skid shutting down power and every valve they could find. This included the north loop which is a separate system and the loop that blew. There are 7 blow molders on the north loop which were idled but their hydraulics were kept running. (yup, HEAT!) When the power was shut down on the pump skid, there's a motorized valve that fails closed. This was part of the purchased system and programmed to shut. This is a major point of concern to the insurance investigation because when closed along with all the other valves, the bladder expansion tank is isolated!!

I've have 4 mechanical contractors in to quote repairs. The lack of a pressure relief has been discussed and 3 said they do not install them on chilled water systems. The 4 said they do. Well, There will be pressure relief's on both loops when repaired.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote 63 Skier Quote  Post ReplyReply Direct Link To This Post Posted: April-25-2015 at 3:08am
That's a lot of pressure on a water system to blow apart sch. 80 pvc like that. What caused the pressure spike, I'm guessing a water hammer from something shutting down too suddenly? No pressure relief on the system?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2015 at 10:09am
only to get canned again when the cans start rolling?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote quinner Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2015 at 10:03am
So you got canned from a can plant only to have a pipe blow like a cannon which gets you uncanned.... that's uncanny
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lewy2001 Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2015 at 4:30am
Originally posted by OverMyHead OverMyHead wrote:

Looks like a good place to start salary negotiations from.


My thoughts exactly get a contract period and a handsome hourly rate   

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Post Options Post Options   Thanks (0) Thanks(0)   Quote john b Quote  Post ReplyReply Direct Link To This Post Posted: April-10-2015 at 3:04am
Yikes!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote OverMyHead Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2015 at 10:06pm
Looks like a good place to start salary negotiations from.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Morfoot Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2015 at 9:55pm
Scary Stuff Pete.....guess that's one way to get your job back......a built in Sabotage switch in case they can you after all your hard engineering design..... Smart move!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Smithfamily Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2015 at 8:15pm
Wow!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2015 at 7:49pm
Originally posted by Gary S Gary S wrote:

Did this happen when no one was there,looks pretty quiet. And what are those flashing lights on the machines?

Gary,
We blew a blow molder cooling hose in another area of the plant about an hour before the big problem. Everyone was called away from the gas can area to go mop up the first mess. The flashing lights are a fault of some kind.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2015 at 7:40pm
Did this happen when no one was there,looks pretty quiet. And what are those flashing lights on the machines?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: April-09-2015 at 7:27pm
Here's the video of our exploding chilled water system caught by the in house camera. It blew about 200 feet of 8" and 10" scd. 80 pvc pipe into pieces no bigger than 2' long. Thankfully no one was injured. The rupture started at the far end of the screen. The closer breaks are from the shock wave that went through the mains. At least they aren't blaming me for my design!!!

Link


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