Piping Design Centrifugal Pump

[Boghi1990]

Hi,

Why the suction and discharge lines have to be one or two sizes larger than the pump connection nozzles? What could happen if the suction or discharge lines are larger than the pump suction or pump discharge nozzles? I would appreciate if anyone can help me with an answer to this topic.

Regards,

One Point

 

[pennpiper]

This subject has been discussed at length please check the "Search" feature and see what you get.

 

[Boghi1990]

Hi Pennpiper,

I could not find any answer to my questions. If you know of a link where I can read about this topic, please send it to me.

Regards,

One Point

 

[vpl]

It's probably because you're not looking in the pump forum (forum407). Here's a few to get you started:
thread407-251629
thread407-231947
thread407-262097
thread378-239699

Patricia Lougheed

******

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.

 

[CRG]

For the suction line, you need to look at the difference between NPSHA and NPSHR. The following link should help:

http://www.mcnallyinstitute.com/11-html/11-12.html

For the discharge, you need to look at the pump curve and the system curve and their intersection to understand what you need.

 

[pennpiper]

Your questions sound like they are from a piping design training class.

I think you need to check your text book and your notes then ask your instructor.