Today is Wed, Jan 7th, 2009
Engineering Tools > Wall Thickness Shell 		 
 
Type of shell    
Design pressure Pd N/mm2 ( = 1 MPa = 10 Bar )
Design temperature Td 0C  
Material description  
Select yield stress and specific gravity from material database >
Yield stress, design temperature Re(Td) N/mm2  
Specific gravity kg/m3  
Outside diameter De mm  
Length tangent to tangent L mm (If not a sphere)
Nominal wall thickness dn mm  
Corrosion allowance Ca mm  
Tolerance tol mm  
Strength reduction coëfficient z -  
Semi angle at apex cone degree (For cone only)
Design Code (ASME, Dutch R., PED)
       
   
  Note: Without warranty and for estimating purposes only. Results should be checked and approved by qualified engineer.
     
     
 
Wall thickness calculation of Cylinder
according Dutch Rules
  
     
  Allowable stress f = f1 = 0.67 * Re(Td) = 0.67 * 175.2 = 117.38 N/mm2  
  Calculation thickness d = dn - Ca - tol = 8.2 - 1 - 1.03 = 6.17 mm  
           
  Cylinder:        
           
  Inside diameter Di = De - 2*d = 219.1 - 2*6.17 = 206.76 mm  
  Required wall thickness
dr =
Pd*De

(2*z*f + Pd)
=
0.5 * 219.1

(2*1*117.384 + 0.5)
=
0.47 mm  
  Nominal required thickness drn = dr + Ca + tol = 0.466 + 1 + 1.03 = 2.50 mm  
  Required strength reduction
zmin =
Pd*(Di + d)

2*d*f
=
0.5*(206.76 + 6.17)

2*6.17*117.384
=
0.07350  
  Thickness analysis, d > dr ? dn = 8.2 mm is OK      
           
  Weight     96.22 kg  
  Enclosed volume     0.073 m3