what i am asking is not realted to caesar but i would like to know others opinion. my line is running over concrete pipe rack .line temperature is 500 centrigrade . i am afraid whether there is sufficient temperature loss in shoe so my concrete pipe rack could withstand that temeperature.
(if it is steel piperack i assumed support standard length have taken care this problem)
i have done some premilarily calculation simliar to temperature drop in fins.
but I am highly doubtful about the validity of that calculation (especially the value of h that i have taken )
please suggest how others deal for similar problem . please dont suggest me fem modelling in ansys or any other package.
manual calculation or thumbrules will serve better.
thanks in advance

Regards
Pinky

Definately do a thermal FEA.

See MSS-SP 58.

Regards

You can go for A FIN ANALYSIS GIVEN IN ANY STANDARD ENGG. HEAT TRANSFER TEXTBOOK
REGARDS,
Soummitra

Generally heat transfer from line temperature is not a concern for hot line. Only need to select proper insulation thickness & material.
However for cryogenic line situation is different
1) clamp shoe type support to be used, Proper insulation will be there between pipe & clamp, No direct contact allowed.
2) Shoe can be welded directly with pipe. some insulator ( Micarta) in between shoe & support structure.

Regards

Habib