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Example calculation

Calculation of anchors

in accordance with "VdTÜV, VGB and FDBR Vereinbarung Dampfkessel 2003/1"

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

Input data

 

1. Construction data:

  Outside diameter of the coat da   mm
  Coat wall thickness seM   mm
  Floor thickness seB   mm
  Type of the flame tubes    
  Angle between the neighboured edge anchor α   °
  Edge anchor sloping angle to the coat lengthways axis β   °
  The applicable loading on an edge anchor Ap   mm²
  Inner pressure p   bar
  Allowable stress for floors σB all   N/mm²
  Allowable stress for coat σM all   N/mm²
  Allowable stress for anchors σA all   N/mm²
 
 

2. Excisting anchoring measurements:

  Thickness of the edge anchor sA   mm
  Hight of the edge anchor cross cut h   mm
  Maximal bow length between the floor side
line of two neighboured edge anchors lA
  mm
  Edge anchor line length on the floor lB   mm
  Edhe anchor line length at the coat lM   mm
 
 

Results

 

1. Stresses by inserting the excisting anchoring measurements:

  Maximal stress in the floor σB   N/mm²
  Maximal stress in the coat σM   N/mm²
  Maximal stress in the anchor σA   N/mm²
 
 

2. Recommended anchoring measurements:

  Thickness of the edge anchor sA   mm
  Hight of the edge anchor cross cut hmin   mm
  Maximal bow length between the floor side
line of two neighboured edge anchors lA max
  mm
  Edge anchor line length on the floor lB min   mm
  Edhe anchor line length at the coat lM min   mm

Attachments

  1. Sketch
 
 
  2. Comment
  Attention!
  This calculation only recommends characteristics. Ask for the correct proof of the local stresses in the coat and in the tube plate.
We offer you a very cheap supply of a FEM calculation with parameteric shell and patten models.
 

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