Internal Lining In Pressure Vessel

[hahoo]

Hi All,

when designing Pressure vessel with internal lining, do we need to make 0 psig external pressure & temp., or we need to put 15 psig press. and design temp.?

Please help me out, appreciate your help

Thanks

 

[vesselfab]

Most vessels are designed with external pressure for condestation at steam out and if have a pump out.

Whether or not you have an interal lining has little to do with it.