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Example calculation

Axial forces and stresses in the coupled concentric pipes

caused by thermal and mechanical loads

Attention!
This calculation is only a simplified estimation, and does not replace a detailed design calculation.

Input data

Pipes  I
(innermost) 		 II
  		 III
(outermost)
 Outside diameter       mm
 Wall thickness       mm
 Modulus of elasticity       MPa
 Poisson's ratio        
 Thermal conductivity       W/(m·K)
 Thermal expansion       10-6/K
 
Loads  inside
pipe I 		 between
pipes I – II 		 between
pipes II – III 		 outside
pipe III
 Pressure         bar
 Film coefficient         W/(m²·K)
 Medium temperature         °C
 
 

Results

Pipes  I
(innermost) 		 II
  		 III
(outermost)
 Mean temperature       °C
 Axial force       kN
 Axial stress       MPa
 
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