Dear Subba rao,
We can not anchor nearer to pump nozzle as it will lead to situation of two anchors with a small pipe piece. That piece will have some expansion, and that expansion itself can produce huge thrust loads on the pump nozzle.
This situation is similar to small column with both ends fixed, and that small column is having some thermal expansion and that thermal expansion strain we are restricting with these anchors, so obviously it will thrust loads and which will be more than API 610 allowable nozzle loads.
Stress = E x Strain (Here, strain is thermal expansion movement).
General practice is to provide enough flexibility in the routing itself, and play with supports and friction reducing pads (Teflon Pads).
Phani Kumar
Foster Wheeler Eastern PTE Ltd.
Singapore.
Thermal Systems Design <tspldesign@thermalindia.com>
23/10/2004 06:47 PM
Please respond to PipingDesign
To: pipingdesign@yahoogroups.com
cc:
Subject: [PipingDesign] Clarification regarding API 610 Analysis
From : K.V.Subba Rao <tspldesign@thermalindia.com>
To : PipingDesign@yahoogroups.com
Sub : Clarification regarding API 610 Analysis (CAESAR)
Sent : Sat, 23rd Oct '04
Dear Sir,
We are engaged in Design, Manufacture, Erection and Commissioning of WHR Systems.
We are having certain doubts about API 610 Analysis.
We are anchoring at pump suction flange Anchor was provided and ensure
that no forces
and moments are transferred to pump suction flange.
And no API 610 Analysis required because we are anchoring near the flange. A anchoring support will be provided.
To understand we are enclosing here with Input file for the same. Can you comment we are correct or not.
Your early reply will be highly appreciated.
With Best Regards,
For Thermal Systems (Hyd) Pvt. Ltd.
K.V.Subba Rao
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[Non-text portions of this message have been removed] Received on Mon Oct 25 20:50:00 2004
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