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Code ASME-Contraintes Admissibles
  • Section II, Table 1A
  • Section II, Table 1B
  • Section II, Table 3
  • Carbon Steel (Acier au carbone) - Exemple
  • High Alloy Steel (Acier fortement allié) - Exemple
Viroles et Fonds
  • Cylindre soumis à une pression interne
  • Fond bombé elliptique
  • Fond torisphérique
  • Fond bombé - Forme torosphérique
  • Fond bombé - Courbe en anse de panier
  • Fond Hémisphérique
  • Fond plat (circulaire)
  • Fond plat (non circulaire)
  • Pression équivalente de bride (charges ext.)
  • Bride plate à souder
  • ASME B16.5 Brides
Détermination du pourcentage de déformation
  • Déformation d'une virole
  • Déformation d'un fond bombé
  • Déformation d'un tube ou d'un coude

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Calcul en ligne: Fond bombé elliptique soumis à une pression interne selon ASME Code Section VIII-Division 1


Pression interne P:

bar CIS ASME TÜV Thüringen Group

Épaisseur du fond thead:


Contrainte admissible du matériau S:


Coefficient de soudure E:


Flèche intérieure h:


Résultats intermédiaires:


  I [App.1-4(1)] II [App.1-4(1)]    
Online Rechner ASME Code Online Rechner ASME Code    

L'épaisseur de paroi requise treq:


Marge de reserve:


Erreurs de saisie:



The formula for the typical 2:1 elliptical head is listed in paragraph UG-32(d) of ASME Code Section VIII, Division 1. The general formula for all elliptical heads within the dimensional scope is addressed in Appendix 1-4. Factor K varies depending on the shape of the ellipse. Please note that an elliptical 2:1 head must not be mixed up with the German DIN 28013 torispherical head (Korbbogenboden). Although both types of heads are within each other’s shape tolerances, they shall be calculated using different formulas resulting in different required thicknesses. As a rule the required wall thickness of an elliptical 2:1 head is less than that of a Korbbogenboden. If a nozzle reinforcement calculation in the crown area is needed, however, the Korbbogenboden formula is more advantageous.

P = MAWP + hydrostatic head at operating conditions
Do/D = ouside/inside diameter of the straight flange in corroded condition
S = allowable stress value from Section II, Part D of the material at design temperature
E = efficiency factor 1 for seamless heads if UW-11(a)(5)(b) is met (Cat. B o C adjacent butt welds needs to be spot radiographed as a minimum) otherwiese 0,85.
h = inside height of the head without straight flange in corroded condition (example: typical 2:1 elliptical head with 1000 mm inside diameter => h = 250 mm)

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ASME Section VIII Division 1
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