Connection Possibilities

[Rahul Meshram]

Hello,
I am new to this field and have one doubt.
I am having a cast iron pump of 300# can I connect this pump to piping of Carbon Steel of 150# ?
If yes then How?

 

[Artisi]

check PCD and number of bolts for each flange, this will give you the answer.

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.)

 

[mk3223]

Simply to connect one 300# flange on the Class 150 piping and bolt to the pump nozzle. typically, the Class 150 piping spec is to include a 300# flange for connecting to the equipment, I.e. pump, vessel, etc.
To be sure the 300# flange should be FF for mating with the flange of your cast iron pump.

 

[LittleInch]

FIRST, make sure the output pressure of the pump in the worst case (usually max suction pressure/ head and locked in condition is lower than the Class 150 rating of your pipe and flange material.

Thus varied with material type and operating temperature, neither of which you've told us. So it could be a high as 19 bar, but a low as 10.

Physically you need to weld a class 300 flange on to the end of your piping or use a transition piece with one FF class 300 flange and one class 150 (RF?) flange welded back to back.

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

 

[TenPenny]

Why does the pump have 300# flange? If it has been ordered and configured for this specific application, the pump manufacturer has determined that it will need 300# flange to meet the worst case discharge pressure condition. Or it could be that, for example, it is an API pump that comes standard with 300# flanges even when used in a lower pressure system.

If your application does not require 300# rated discharge, make a custom spool piece to go from a 300# flange to a 150# flange.

 

[Rahul Meshram]

Thank you all for your responses I got it now.

 

[SB1976]

Hi Rahul,

Sorry to state that your question is not quite correct.

There is no such thing as "cast iron pump with 300# rating flange". I guess you are referring to normal centrifugal pumps wherein the pump nozzles are integrally cast with the pump body. In that case, cast iron flange rating is limited to 250# rating only. Cast Iron has a pressure limitation. Beyond 250# rating (300# rating or more), it is not cast iron but rather ductile iron.

Your question should have been whether 300# rating pump flange can be matched with 150# rating piping flange. In that case, yes, it is possible to do so for lower sizes (<4") since PCD and other parameters are identical.

Trust this clarifies.

Sumit.

 

[GBTorpenhow]

whether 300# rating pump flange can be matched with 150# rating piping flange. In that case, yes, it is possible to do so for lower sizes (<4") since PCD and other parameters are identical.

Come again?