Isolation of pressure vessels

[pantheist]

Can anyone brief me about the Isolation of pressure vessels?.,
Why Isolation of Pressure vessels are required when it operates at cryogenic temperatures?

Hope someone helps to understand the basics.

 

[C2it]

What relevance has temperature to isolation requirements ?

Why would you not want to isolate a vessel ?

 

[pantheist]

Hi,

We got an inquiry for the vessel which needs to be Isolated from the concrete foundation, since the Design temperature of the vessel is -100 deg.cel, Ambient temperature is -2.7 deg.cel
From my understandings, I believe this isolation is necessary otherwise it negative temperature of the vessel would hit the concrete that will lead to reduction in its compressive strength and other related factors.

I am not quite strong in the basics, Can you please advise about the allowable temperature which is required at the base of the saddle to protect the concrete foundation?

 

[C2it]

OK so you were thinking about THERMAL insulation, not product isolation.

Is it a vertical vessel ? If so is there a significant skirt height ?

Have you looked at thermal conduction to the concrete from the vessel itself ?

 

[pantheist]

I am talking about the Vessel isolation and not insulations...We are suppose to provide the material of GRP between the saddle of the vessel and its foundations just to isolate the process design temperatures from being in contact with concrete.

We are yet to receive the drawings on this aspect.

 

[C2it]

Quite. However the usual expectation when discussing pressure vessel ISOLATION would be regarding pressure and related safety.

So far as insulating the vessel foundation from thermal effects is concerned, there are many commerically available insulation products that would provide satisfctory load bearing and insulation properties. Try Google.

 

[jtseng123]

Thermal break block for saddles, made of laminated compresssed hardwood and coated with monolar mastic.

 

[TD2K]

As far as why the customer wants it, it's to limit heat flow from the foundation into the vessel and the process. That level of temperature has been achieved through refrigeration and is expensive heat to remove thus the need to limit heat input into the process.

 

[europipe]

As mr. Tsjeng sais: wood (azobe)

 

[MortenA]

@sundarzplant: This is not meant as an insult - in my navetive language (Danish) there is not a separate word for insulation - its the same as isolation (wethers its electrical, thermal or something you do to a prisoner or somebody carrying the plauge) and its the same in German as far as i recall. I dont know about other languages

 

[europipe]

But you write in English so you have insulation and isolation.
This is a case of insulation.

 

[chicopee]

C2it had the correct responses. When referring to vessel isolation we are talking about valves to allow products to enter or exit the vessel and that's the parlance used by engineers.