Re: FRP vibration

From: <alwyn>
Date: Fri May 16 2003 - 12:41:00 EDT

this was the response when I tried to resource Hydril as you proposed. Couldnt get an answer on a Hydril Distributor after weeks of trying

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The site to which you have requested a password is intended for current Hydril customers. We have searched our database and are unable to find -------co name------.

If you have a specific request about Hydril or its products please reply directly to this e-mail and we will endeaver to answer your queries.

Thank you for your interest in Hydril and have a great day.

Best Regards,

Richard Sprague
Manager, Marketing and Technical Services Hydril
Pressure Control
Houston, TX
Phone: (281) 985-8771

Fax:        (281) 985-8665
e-mail:     <a href="/group/PipingDesign/post?postID=1LVPaY_rig_8JW8a03LsEE4gUEmWSN7tisVG7Nar732_RvU3hGjcvl5lsDur8d0B_nqEx4fb0qvTbPgObA">rsprague@hydril.com</a>

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• Original Message ----- From: Geoff Stone DD&D Australia To: <a href="/group/PipingDesign/post?postID=HOg-r3gHAOU0ucGRrTiKghKaMEg9n0zKv_HeHsLE1G387X6vIw90qv2KtkfZ8HQjqxTTPENa256eupZ5t4v2so_3wcAn">PipingDesign@yahoogroups.com</a> Sent: Tuesday, April 29, 2003 11:43 PM Subject: Re: [PipingDesign] FRP vibration

   Hi Sujianto,

   Vibration can be reduced by use of pulsation dampeners on the suction and    discharge. Hydril have software that you can download to determine the size    required or your local Hydril distributor can do it for you.

   FRP has some concerns when it comes to vibration as it is a composite material.

   Delamination of the gel coat, separation of fibres from the resin substrate    etc.

   Algor's Pipepak allows the modelling of FRP and vibration analysis as I sure    Caesar, Pipenet, Triflex and Autopipe do.

   Expansion joints are not the way to go at such pressures although reinforced    hoses may give some relief. You have to work out where the vibration is coming    from to determine how you cure it. Is it a fluid structure interaction or a    mechanical vibration from the reciprocating machine parts?

   Geoff Stone

• jianto@ikpt.com wrote:

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   dear all,

   I have a FRP problem.
   we use multistage pump to generate high pressure. The pressure is 2500    psig.
   how to void vibration on pipe?
   do we use expansion joint to void vibration?    we don't have experiance about calculation of FRP flexible analysis.

   regards,

   Sujianto

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[Non-text portions of this message have been removed] Received on Fri May 16 12:41:00 2003