Expansion trust force effect to pump nozzle.

From: <Tanakorn>
Date: Mon Apr 08 2002 - 22:32:00 EDT

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.

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T. Wanichpol

[Non-text portions of this message have been removed] Received on Mon Apr 08 22:32:00 2002