piping strain issues

[turbofanatic]

how can i eliminate piping strain from two acid condensate pumps running on same suction and discharge header after correcting piping strain then adding bellows on both suction and discharge lines vibration readings still high

 

[BigInch]

If you have pump vibration, piping is probably not affecting that much one way or another, although the reverse is not necessarily true.

What kind of pumps, centrifugals, recip?? How big, etc.

From "BigInch's Extremely simple theory of everything."

 

[JJPellin]

What makes you think that the vibration is caused by pipe strain?

Johnny Pellin

 

[QualityTime]

I would consider getting rid of the bellows on the suction and discharge. You have unbalanced forces and if it is great enough the pump will move. The best joint is a flanged joint. If you have a victaulic coupling, between the check valve and isolation valve, install tie rods across the coupling

 

[KernOily]

By adding bellows you might actually have made your problem worse. If I was doing this I would do a full flexibility analysis of the piping to figure out where your pipe strain problem is coming from. Pipe strain comes from lots of root causes: support foundations settling, pump foundation settling, etc. Then I would see if I needed bellows. A bellows should be the l-a-s-t resort to fix a pipe strain problem. Either get the Caesar (or equal) software and do the analysis yourself or else hire a consultant. To do otherwise is just wasting time and money. BTDT.

 

[stanier]

Vibration is likely coming from pump operating to the right of BEP, poor inlet conditions or cavitation. The piping vibrating and transferring this to the pump body is unlikely with bellows on suction and discharge.

If indeed the piping is vibrating then you could add pipe supports to prevent the piping vibrating.

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

 

[MJCronin]

I agree with stanier...

Most pump vibration is a result of operating too far from the pumps BEP.

Based on field measured data, at what percentage of the BEP are you operating ?

Additionall, have you checked pump/baseplate anchorage ?

Are you certain that you do not have "soft foot" conditions ??