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Pressure Vessel Nozzle Connection Design

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The following are acceptable types of welded nozzle designs and other connections to pressure vessel shells, heads and other geometries.

For additional details, see ASME PVCS Section VIII - Division 1.

Acceptable Nozzle Weld and Designs
Notes
  • Nozzle with integral reinforcement.
  • For designs that utilize NPA 3 (DN 80) and smaller, exemptions given in UW-16(f)(2) apply.
  • t1 + t2 greater or equal to 1.25 tmin
  • Nozzle with integral reinforcement.
  • For designs that utilize NPA 3 (DN 80) and smaller, exemptions given in UW-16(f)(2) apply.
  • t1 or t2 not lessthan the smaller of the .25 in (6 mm) or tmin
  • Nozzle with integral reinforcement.
  • For designs that utilize NPA 3 (DN 80) and smaller, exemptions given in UW-16(f)(2) apply.
  • t1 or t2 not lessthan the smaller of the .25 in (6 mm) or tmin
  • For designs that utilize NPA 3 (DN 80) and smaller, exemptions given in UW-16(f)(2) apply.
  • For designs that utilize NPA 3 (DN 80) and smaller, exemptions given in UW-16(f)(2) apply.
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