Why Limpet and Half Pipe Coil is not considered as light reinforcement in EN 13445?


Question

Why Limpet and Half Pipe Coil is not considered as light reinforcement in EN 13445?

Answer

Larger the vessel diameter is lower the theorical elastic pressure of a stiffener on a cylinder is : 

 
As the following criteria is not met, the coil is not considered as light stiffener :

Avoidance :
  1.  Provide additional light stiffening or heavy stiffening
  2.  Increase Shell Thickness

 

See Also

Bentley AutoPIPE Vessel

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