(no subject)

From: <Steve>
Date: Thu Oct 09 2003 - 03:33:00 EDT

I just insulted you in the centrifugal-pumps group.

I have two stories; the first reported to be true, and the second tragically true.

The first was a DC3 which had its main wing spar X Rayed while a fitter was having a nap in a wing compartment. He stayed asleep.

The second was at a hydro power station not far from here. Two guys were doing a quick penstock internal inspection. The penstock is the big pipe leading downwards from the dam to the turbine. The headgate is a big valve at the penstock entrance and is obviously closed during inspections. Most headgates have a "crack" facility which allows them to open just a fraction, enabling the penstock to be primed prior to a start.
The operators decided to play a joke on the inspectors and cracked the headgate. However when they went to close it things went wrong. For some reason the headgate controls were configured to fully open the gate before closing it. So they hit "close" and the gate opened fully and then closed. End of two inspectors.

Paul may wish to provide the moral to the stories.

Cheers

Steve McKenzie

-----Original Message-----
From: Paul Bowers [mailto:pbowers@pipingdesign.com] Sent: Thursday, October 09, 2003 8:11 PM To: <a href="/group/PipingDesign/post?postID=qdax4bv4j_oahPce-o1N0SUD1qE1Oc8EzwuysieUJiGQhlMnWyAHfoDVwH_u5wzUK0UK8xv7L2aWl-aX0un6kIdLSjE">PipingDesign@yahoogroups.com</a> Subject: Re: [PipingDesign]

Interesting. To me, "bootstrap" means something else (plant startup).

Any stories about the guy that got forgotten in there/fell asleep and ended up being unintentionally part of the project in a way he never intended? Hell, if there isn't one, make it up.

I seem to recall old shipbuilding tales about the worker that got welded in behind a bulkhead due to being hungover. A cautionary tale indeed!

Paul

• Original Message ----- From: "Steve McKenzie" <Mechproj@xtra.co.nz>

> Paul
>
> in larger pipes the main sections are factory lined. The joints are often
> buttstrap. After the joint is welded, some lucky soul gets to crawl up the
> pipe with a bucket of cement mixture and hand render the joint. Sometimes
a
> manhole is let into the pipe. On pipes too small to crawl up I normally
use
> flanges, but a sacrificial sleeve and pressure grouting from the outside
> could be easily arranged, as can a pressure bag if there is access from
one
> end. Its just a cost thing; flanges can be very expensive and are a
> potential leak point. One cement lined steel pipe I know of (seawater)
uses
> gibaults and has lasted 30 years, with the usual leaks, but the pipe ends
> have lasted which surprised me.
>
> Mate, we can do anything! Sometimes it even works.

>
> I'm no expert on this matter, but how is the lining put into the pipe if
the
> sections (including the lining) are not manufactured in a plant?
>
> Sliplining is possible now, but was it then?

> > Flanged spools can also belong to Ductile Iron Piping that is not
> > lined. Correct me if I'm wrong

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Information presented on this list is given as helpful advice, nonsense, carefully-considered calulation or any combination of the above. The intent is to spark discussion and encourage knowledge-sharing amongst professionals. If you blow yourself up by doing stuff remotely described by info gleaned from reading this list, you are an idiot.

Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Thu Oct 09 03:33:00 2003