Re: Piping around Reciprocating Compressor

From: <Paul>
Date: Sun Oct 07 2001 - 03:53:00 EDT

Unless I see sometthing that changes my mind, I'm going to have to kick someone off the list.

Paul

• Original Message ----- From: "Macharla, Hari" <HMacharla@mcdermott.com> To: <PipingDesign@yahoogroups.com> Sent: Sunday, October 07, 2001 2:47 AM Subject: RE: [PipingDesign] Piping around Reciprocating Compressor

> See the reply in CAPS
>
> -----Original Message-----
> From: SARE, RALPH H. [mailto:SARERH@YANPET.SABIC.com]
> Sent: Sunday, October 07, 2001 10:33 AM
> To: 'PipingDesign@yahoogroups.com'
> Subject: RE: [PipingDesign] Piping around Reciprocating
Compressor
>
>
> this sucker is big. for a positive displacement machine like a
reciprocating
> compressor, .....COULD NOT FOLLOW WHY YOU SAID IT IS BIG FOR
RECIPROCATING
> MACHINE. AS YOU MIGHT BE KNOWING OPTION OF RECIPROCATING Vs
CENTRIFUGAL WILL
> LIE WITH ACTUAL VOLUME FLOW RATE AND PRESSURE RATIO. IT IS NOT
UNUSUAL TO
> HAVE RECIPROCATING COMPRESSORS IN THE ORDER OF 8 TO 10 MW SIZE
>
> my worry will be pulasation and vibration more than the
nozzle
> load. the piping designer must be at least conversant or
familiar with the
> mode shape and understand the physics of resonat frequency....
THIS IS NOT
> AT ALL A PROBLEM, SINCE IT WILL BE TAKEN CARE IN API 618,
APPROACH-3
> STUDIES. MY QUERY WAS SPECIFICALLY WITH REFERENCE TO NEW ELEMENT
IN THE
> SYSTEM SPRING SUPPORT/VIBRATION ISOLATOR ON THE FOUNDATION.
>
> And in most cases, prediction by computer modeling is unrelaible
(at least
> my expereinced). ... RALPH, COULD YOU ELABORATE. I COULD NOT
FOLLOW. IF THAT
> IS THE CASE, SOME THING MIGHT BE WRONG WITH EITHER THE PROGRAM
OR INPUTS.
>
> HARI
>
>
>
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Received on Sun Oct 07 03:53:00 2001