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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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Hemisferische bodem ASME Code Sectie VIII, Divisie 1


inwendige druk P:

bar CIS ASME TÜV Thüringen Group

minimale wanddikte tmin:


toelaatbare spanning S:


Lasfactor E:




  I [App.1-1(2)] II [UG-27(3)] III [App.1-3(1)] IV [App.1-3(1)]
Online Rechner ASME Code Online Rechner ASME Code Online Rechner ASME Code Online Rechner ASME Code

nodige wanddikte treq:

ontwerp marge:




Just as for cylinders the ASME Code provides four different formulas for the design calculation of hemispherical heads. In order to determine the joint efficiency factor E the requirements listed in UW-3(a) referring to the joint category have to be accounted for. According to UW-3(a) the attachment weld of a hemispherical head to a cylinder is always classified as a Category A weld subject to circumferential stress. Since the hemispherical head therefore includes a Category A joint at all times, the ASME Code never considers it as a seamless, but always as a welded part. This also applies to hemispherical heads manufactured from seamless plates. Thus the requirements of UW-12(d) for seamless vessel sections must not be used. Due to that reason the joint efficiency factor of hemispherical heads, although without additional welds, shall be determined using paragraphs UW-12(a), (b) or (c) depending on the design and volumetric examination of the attachment weld.

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ASME Section VIII Division 1
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