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 Standard metrology jigs for two pipelines at the same elevation |
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 Dual plane jigs for pipelines at different elevations |
 Here is some free software for doing metrology calculations. |
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Standard metrology jigs for two pipelines at the same elevation |
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Dual plane jigs for pipelines at different elevations |
Here is some free software for doing metrology calculations. |
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Installation
of an O ring gasket using a Flange Skillet:
Align the flange faces. Get 2 or 3 regulation bolts in. Slide the O ring and skillet between the flanges. Install additional bolts to center the skillet and capture the O ring. An in-water tip for getting your o-ring back into the skillet when it pops out: Courtesy of M Roehl "For a quick way to install an o-ring in a skillet just place the o-ring in the grove of the flange and place the skillet over the top, tap it with the heel of your hand (small skillet's up to say 10"/12") it will seat right around the o-ring and because it can't go past the flange face it goes right on and won't slip off. This works well in the water and out. For bigger o-rings you will need a small mall. Try it, it works every time." |
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| Some Tips from Joe Vidrine on using Flange Skillets:
To adjust the fit of a micarta (non-conductive) flange skillet: Tighter - Remove the plastic insert from the skillet. Wrap teflon tape around the diameter of the insert inside the groove. Put the insert back in the skillet. The more tape, the tighter the fit. Looser - Use your Big Chief to scrape evenly all the way around the insert until the O ring goes in. To adjust the fit of a metal flange skillet: Tighter - Take a center punch and hammer all the way around the inside diameter of the skillet at 1" intervals about 1/8th of an inch from the inside edge. Secure with teflon tape if necessary. Looser - File lightly around the inner diameter of the skillet. A word on the bigger sizes of O rings & metal skillets: The larger O rings as supplied are very often a little out of round and difficult to get into a skillet. When this is the case, you may find it helpful to lay the O ring on a flat surface and lay some thin spacers alongside it. These spacers should be a little less than half the width of the O ring. Next, lay the skillet over the O ring and you can force it on without it popping all the way over the O ring and off the other side.
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F l a n g e S p e c i f
i c a t i o n s
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Converting pipe schedule to wall
thickness in inches - click
here
 The Hard Way Bronze by Patrick McKeever. |
From Reefer: Never...never....never....leave the surface without 1) a large hammer, 2) two drift pins the right size 3) your chamber bag loaded with a can of Skoal so you can enjoy a big fat dip and a cup of coffee whilst reflecting on how you'll handle HERO STATUS on account of your flange success because you remembered to take along items 1) and 2), once your chamber run is over.....Reefer |
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From
hammerwrench@mailcity.com
A
common mistake is to run the eyes of the lacing sling back through the
corresponding holes on the other flange before connecting them to your
lift bag or tugger. Better if you run them into bolt holes that are
lower. For example, go from 10 and 2 on the first flange to 9 and 3 on
the second, and then to your lift bag. This keeps the second flange
from sagging and makes it a lot easier to
stab your drift pins.
No matter how big the hole you jetted out is, it ain't big enough.
Somebody told me years ago to always cup a drift pin in my hand and not get my thumbs between it and the pipe. I've still got thumbs.
You can get slightly higher pressure on each pass with a Hytorc if you put the pump reservoir in a cooler full of ice. This works really well on hot days.
Have
the tenders weld a chain link on to the end of the handle of each
hammer
wrench for lanyards. Actually, you would be better off getting a welder
to
do it.
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| A
Finger Saver - Rob Moro After you have a couple of bolts in your flange and you want to check the gap - in zero viz of course - hold a nut between your thumb and forefinger where they come together. Now you can still use your finger tip to feel the gap, but if the flanges come together on you they will pinch the sides of the nut and not your fingers. Of course you never want to put fingers between flange faces anyway and everybody knows none of us ever do... |
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This is actually a flange
breaking tip. With all the decommissioning going on world-wide
there is a good chance that you will find yourself with a couple of
flogging spanners and a man-sized hammer removing a spoolpiece from a
riser. Happy hammering! |
