Saddle support for horizontal vessel

[sksmechanical]

Hello all,

I have a horizontal vessel (1" thick API 5L X70 PSL2 pipe)that we will not be stamping with ASME. Seam to seam length is 160'. Question is is it practical to use three saddles on this vessel or keep it to two and beef them up. As of now I have two with a distance of 20' to the seam and 120' between the saddles. I have high bending stresses between the saddles and at the saddles. I understand Zick only analysed two saddle design. Any advise is helpful. Thanks in advance.

 

[pennpiper]

Use only two Saddles!

 

[SnTMan]

sksmechanical, this subject has been discussed previously, try a search.

Regards,

Mike

 

[LSThill]

sksmechanical (Mechanical)

Search for the reference technical paper:

A Simple Solution to Cylindrical Pressure Vessels on Multiple Saddle

 

[chicopee]

I have seen a 60,000 gallon propane tank with three piers in my area.

 

[MJCronin]

Its way too long... use multiple vessels

There are practical reasons why you shouldn't fabricate a vessel of this length with only two saddles.

Giant horizontal vessels can make the foundation design an expensive nightmare for no good reason

What is the liquid/gas is being stored ?

what is the design pressure ?

What is the vessel diameter ?

And.....yes this has been discussed previously in these fora

 

[sksmechanical]

Prelim analysis looks good so far using two saddles with 100' span between the saddles and 30' to shell seam. OD is 36"....1" thick API 5L X70M PSL2 pipe. Design pressure and temp is 1000 psig and 300 deg F respectively. This is an inlet slug catcher.