RE: Expansion trust force effect to pump nozzle.

From: <Jarot>
Date: Tue Apr 09 2002 - 22:29:00 EDT

Please try this it may be help for your problem :

1.Make loop for piping go to steam turbine.
2.Put spring support/hanger at those line of piping.
3.Put an Anchor movement (Resting X,Y,Z) in elbow before expansion joint

and steam turbine Nozzle

This is just general it might be help.

Jarot Mursito.

-----Original Message-----
From: Tanakorn [mailto:Tanakorn@tonan.co.th] Sent: Tuesday, April 09, 2002 9:32 AM
To: Mr. Piping Design Group
Subject: [PipingDesign] Expansion trust force effect to pump nozzle.

Dear Sir,
I've recently worked with a CAESAR II model of NPS 32 discharge lines of CW pump to a steam turbine condenser. The design press. is 10 barg. This discharge line have a elastomer expansion joint with limit rods (allow these expansion joint to compression but can not extension) close to the discharge nozzle of pump.
This EJ have the effective diameter = 820 mm. So it will give the bellow thrust force about 528,180 N acting directly to the discharge nozzle. The pump vendor give me the allowable force and moment of this nozzle = 17,450 N and 3,480 N-m respectively. I've modelled this EJ according to the CII Application Guide, P. 5-8 to 5-9. I've try to support this line with guides and line stops in several way but can't reduce the force acting on this nozzle to be lower than the allowable force.
Can anyone give me a advice or general idea in this item? Should I consider the force that acting on the annulus area of EJ only?

Many thanks in advance.

---

T. Wanichpol

[Non-text portions of this message have been removed]

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<a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Tue Apr 09 22:29:00 2002