RE: FW: [Man.Distr]RE: Impressed vibration

Those are make shift arrangements of supports. They were put in because after the vibration incident it was noticed that some of the supports were ineffective (not taking the load). This must have been either due to lifting off by thermal (solar) expansion or by settlement. I have established what support has sunk by taking spot levels. The original supporting arrangement had 20 mm rods welded on top of sleeper top plates. The rods had to be removed to put in the plates.

That launcher route is the only export pipeline which cannot be disrupted. The plant is operating at threshold (at which there is no vibration (by feel and sound))flow rates with the makeshift arrangement of making all the supports effective by the shim plates.

For the long term solution we are currently seeking the help of the specialists to study the vibration source. I am currently investigating agencies who can do this reliably. Did send the problem to a few including LMNOeng, swri, DPS.

Sajit

-----Original Message-----
From: Christopher Wright [mailto:chrisw@skypoint.com] Sent: Sunday, December 28, 2003 10:00 PM To: Sajit Viswan
Subject: RE: FW: [Man.Distr]RE: [PipingDesign] Impressed vibration

>There are no rubber pads, what you are seeing in the photo are 6 mm steel
>shim plates between 2 angle sections.

I couldn't tell from the picture. It still looks a bit makeshift. And it's still not clear that you've actually fixed the problem or simply made one of the symptoms harder to spot.

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)