please look to condenser pump disch

[moideen]

please look to condenser pump discharge into discharge header. is this correct?? is there need a curve on red marked area?

 

[LittleInch]

Don't think so.

Why do you think it does?

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

 

[moideen]

LittleInch ;i understand that the connection to the header is wrong. i have seen this type of connection with curve. this is new project and in progressive stage. what you think...thanks

 

[moideen]

also it increase pressure drop, is there any other terminologies to prove the connection is wrong??

 

[Artisi]

Probably not ideal, but can't see any great drama.

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.)

 

[LittleInch]

This is a standard tee as seen in millions of piping headers around the world.

There is nothing "wrong" about it. "Wrong" implies that it doesn't meet the design code or specification. It does meet the design code and fittings spec.

I think you mean a swept tee. Rarely seen on metal piping systems ( you see them a lot in sewage systems). you can find some stainless swept tees in small diamters ( mainly for sanitary fittings), but not large carbon steel ones.

They cost more, do very very little in terms of pressure drop and can create stress concentrations where the branch meats the heater pipe.

Anytime you do see it it tends to be low pressure cast tees, often water.

I can't ever recall seeing one in decades of piping design.

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

 

[georgeverghese]

If there are solids or corrosion products entrained in the main flow stream , would be better if this pump discharge were configured as a top entry tee in to the main header. If the main header flow is clean and solids free, dont see what could be wrong with this set up. From a maintenance point of view, would be good if there were a piping drop out spool before the discharge isolation valve (and downstream of the suction block valv also),else your operators would be struggling to get this pump out for maintenance.

 

[moideen]

thank you to all who response,i got the word swept tee. thank you littleinch. i have find it swept tee in some of our installations . but i knew now there is no any design code.

 

[moideen]

 

[LittleInch]

Those pictures look like a AC chilled water system??

As said swept tees are much more common in the water / sewage industry than higher pressure hydrocarbons.

I'm pretty sure they are more expensive for very little impact on flow.

You also won't find many HC manifolds with pump discharge into a header at the bottom of the pipe.

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

 

[RVAmeche]

As long as the pump and system can handle whatever the additional pressure drop is through the regular reducing tee, there's no issue. As LI said, this is very common in chemical/industrial systems.

 

[Artisi]

The photo showing swept "T" connection appears to be pump inlet side - different story,

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.)

 

[quark]

I saw such installations during initial days of my career. For me they are just notional and not significant with respect to overall resistance of the system.

Artisi, Is it beneficial for pump inlets?

 

[moideen]

Artisi: the last pic is pump discharge.as quark said any benefit for inlets

 

[RVAmeche]

Sometimes normal reducing tees can result in significant pressure drop, although in my experience this is more in converging flow where you have a fluids at different velocities and a change in direction combined. If the system is near the NPSHR limit for the pump, I could see a swept tee helping.

 

[georgeverghese]

You should also ask the piping engineer to check what mechanical forces are at the pump discharge nozzle for this arrangement with a direct tee into the main header to confirm they are within the max permissible allowed by the pump vendor (for the worst possible normal operating conditions). Obviously, the more elbows there are on the discharge side, the less would be the forces acting on the pump nozzle.

 

[Artisi]

quark, is it beneficial for pump inlets?

A swept T would be preferred to a 90 T close to the inlet if sufficient straight pipe can't be arranged for the inlet of an end-suction pump. For a horizontal split case pump a swept T or long 90 can be fitted direct to the inlet flange, provided the orientation is correct


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.)

 

[quark]

Ok, I am checking whether I missed a point as I shouldn't ignore you when it comes to pumps. Thanks.