Plenum tank stresses considerations

[pegus]

Good day,

I am currently working in a design of a plenum chamber. I am new in this topic, I would like to see your recommendations of the followings doubts that I have:

1.-This Plenum tank will have 3 outlets and 1 inlet, to calculate its stresses, can I consider it as a thin pressure vessel? I am asking this because it wont hold any gas, its purpose is just to equalize pressure in all the outlets.

2.- I want to minimize radial deformation as much as possible, what kind of elements are recommended to achieve this? (Ribs, rings, etc). And how can I obtain the radial growth?

This plenum tank will be running hot air at high pressure (above 250 psig at 1000F), if you have any other suggestion it is welcome.

Thanks in advance!

 

[TGS4]

Size? Shape? Location in the world?

 

[pegus]

Good day TGS4,

It is a 15in inner diameter with a 0.5" thickness round plenum tank.

Regards!

 

[TGS4]

At that pressure, if you are in North America, it is probable that you will be required to comply with the ASME Boiler & Pressure Vessel Code. You would want to design it to ASME Section VIII, Division 1.

You say that you want to minimize radial growth. Is that under pressure or does that include radial thermal expansion? Because ~16in OD made from an austenitic stainless steel is going to grow in diameter by 0.153in. Is that excessive for your application?

 

[SnTMan]

If it is an aerospace part, BPV Code might not be the way to go...

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[TGS4]

If only the OP had provided us with context...

 

[pegus]

Sorry for the lack of details, I did not know that they were that important.

This part is not for an aerospace component.

The reason I want to constrain radial growth, is because that growth overstress a pipe that connects to it.

Regards!

 

[SnTMan]

So, round like a ball, or round like a log?

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[pegus]

It is like a log, it is cylindrical.

Regards!

 

[KevinNZ]

At 1000F the pipe will see thermal stress/growth from the vessel and the pipe itself. You will need to design the piping as well as the vessel. Design the piping with some flexibly, e.g an elbow or two.

 

[TGS4]

Are you seriously going to make us play 20 questions? You've already used 6... Details, friend, details...