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ASME Code - Toelaatbare Spanningen
  • Section II, Table 1A - Toel. spanningen
  • Section II, Table 1B - Toel. spanningen
  • Section II, Table 3 - Toel. spanningen
  • Toelaatbare spanningen koolstofstaal
  • Toelaatbare spanningen hooggelegeerd staal
Mantels en Bodems
  • Mantel onder inwendige druk
  • Elliptische bodem onder inwendige druk
  • Torisferische bodem onder inwendige druk
  • Klopperbodem (DIN28011) onder inwendige druk
  • Korfboogbodem (DIN28013) onder inwendige druk
  • Hemisferische bodem onder inwendige druk
  • Vlakke (cilindrische) bodem onder inwendige druk
  • Vlakke (niet-cilindrische) bodem onder inwendige druk
  • Equivalente flens druk bij externe belasting
  • Losse flens onder inwendige druk
  • ASME B16.5 flenzen
Bepalen van Vormspanningen
  • Vormingsspanning van een mantel
  • Vormingsspanning van een bodem
  • Vormingsspanning van buis of gebogen pijp

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Elliptische bodems - ASME Code Sectie VIII, Divisie 1


inwendige druk P:

bar CIS ASME TÜV Thüringen Group

dikte bodem thead:


toelaatbare spanning S:


Lasfactor E:


Hoogte h:




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

nodige wanddikte treq:


ontwerp marge:





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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