Re: Friction Effects in Piping Systems

From: <BABAK>
Date: Mon Apr 21 2003 - 10:27:00 EDT

Hi,You Know We Have Two Different Types Of Roughness And The Friction Happend Because Of Hydraulic Roughness. The Hydraulic Roughness is Smaller Than Absulote Roughness. That Paragraph is About Hydrulic Roughness.Regards.Babak Rad.

KAUSTUBH JOSHI <kvj@epc.ltindia.com> wrote:Hello All,

A few days ago, a world known consultancy & EPC company suggested us the following:

  1. While performing the static analysis (flexibility analysis) of the piping systems, it is not necessary to consider the friction forces. The friction forces are short time generated loads, and act on the system during the thermal expansion. The friction forces diappears after the thermal movement of the piping. That's why friction should be excluded from static piping stress analysis (flexibility analysis).
  2. There will be no friction at the guide side surfaces or the limit stops. The friction will be there only for the resting supports.

What are your views on these?

Regards,

Kaustubh

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[Non-text portions of this message have been removed] Received on Mon Apr 21 10:27:00 2003

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