Pump head and pipe sizing 2

[extremechanical]

Please advise - to size a pipe ( thickness) should I use the shut off head of the pump considering rated impeller or Maximum impeller . Please let me know if you know a standard or a guideline which specifies it.
Thanks a lot in advance !

 

[LittleInch]

You should use the design pressure of your piping system.

That design pressure should be set by a number of factors including the highest pressure the pipe can see.

Pump pressure at shut off with highest inlet pressure usually gives the highest pump pressure, but setting a design pressure may need to look at other factors.

You would normally use the rated impellor size unless you have plans to upgrade the pump in the future.

This comes under the standard of common design principles....

If you really want some words, try section 301.2 in ASME B 31.3

also look at section 301.1 for the qualifications of the designer.


Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Artisi]

If using standard pipe specs. you can easily establish what its rated pressure at x temp. is allowed. Simply compare this rating with the maximum pressure plus some safety factor you system will operate at, if it's marginal just go up to the next pipe pressure spec.
Insufficient info for us to say - use shut head pressure based on full impeller or reduced diameter.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[extremechanical]

Thank you LittleInch and Artisi

 

[Steve Beck]

There is no reason why anyone should not be able to go out and buy a pump, do the
installation, and be satisfied with the results. There are 3 things to establish: the flow rate which
can be easily determined, this is your basic requirement, the height to which you need to deliver
the liquid (typically water), the friction loss associated with a moving liquid through pipes which
can be determined by consulting method.

 

[Artisi]

Steve Beck: Suggestion - as a new member I would suggest that you read what was asked, in this case it was pipe pressure rating compared to pump output pressure.
As a matter of fact, it is far off the mark, you should red flag it and ask management to remove it.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)