Parallel Tailing Beam/Skirt Stiffening Beam Internal Moment Coefficient Kr and Kt

[jigar305]

Can anyone share how can we calculate Kr and Kt for Parallel Beams configuration as shown on page 685 & 687 of Pressure Vessel Design manual 4th Edition by Denis Moss. refer below snap for it? or reference to calculate from Roark formula.

it is being calculate in AutoPipe Vessel. but no formula mentioned.

 

[JoshRanch]

AutoPIPE Vessel uses internal tables and FEA-backed data, It's a proprietary FEA-based database for support configurations.

I suppose you could validate using Roaks, maybe if you share some details i can check in solid sim

 

[jigar305]

AutoPIPE Vessel uses internal tables and FEA-backed data, It's a proprietary FEA-based database for support configurations.

I suppose you could validate using Roaks, maybe if you share some details i can check in solid sim

Okay. Thanks for the response. Could you please suggest which case is applicable from Roark's formula for Circular rings?
Refer attached file. Hope it has all details you want. Let me know if any other details needed.

 

[r6155]

Try to avoid lifting / tailing lugs.
Contact a transport and erection company.

 

[jigar305]

Try to avoid lifting / tailing lugs.
Contact a transport and erection company.

In case of large columns, it cannot be avoided.!

 

[Trestala]

You get the Kr and Kt using the graph shown on page 687 of Moss.

 

[jigar305]

You get the Kr and Kt using the graph shown on page 687 of Moss.

Has anyone tabulated the graph available on Page 687.?

 

[RadiateurFou]

Try to avoid lifting / tailing lugs.
Contact a transport and erection company.

Could you elaborate? My company designed lifting lugs for its pressure vessels up to 1000 tons, we haven't had yet to pick up any heat exchanger on the floor.

 

[r6155]

jigar305 , RadiateurFou​

Please see Google for videos and photos of vertical PV mounting without welding any lifting/tailing lugs.

I worked with Reactor Pressure Vessel (nuclear): no lifting lugs were used

 

[r6155]

Please, see

 

[RadiateurFou]

5:42 we see clearly tailing lugs being used
I'm also pretty sure the main lifting support at the top of the collumn is also a lug

 

[r6155]

I'm talking about lifting lugs not welded to the pressure vessel.

 

[RadiateurFou]

where else would they be?

 

[r6155]

Only one crane. No tailing lug

 

[RadiateurFou]

So lugs are bad because they need 2 crane?

 

[SnTMan]

If the client spec says they want a tailing lug, they're gonna get a tailing lug

 

[r6155]

1) If the client requires some ridiculous design, I (as the manufacturer) can decide not to send a bid.

2) If the client requires some ridiculous design, I (as a design engineer) can decide to add "Per Client Request" in the document.