Nozzles calculates the required wall thickness and area of reinforcement for a nozzle in a pressure vessel shell or head, and compares this area to the area available in the shell, nozzle and optional reinforcing pad. The software also calculates the strength of failure paths for a nozzle. Nozzles is based on the ASME Code, Section VIII, Division 1, Paragraph UG-37 through UG-45, 2015 Edition. The calculation procedure is based on Figure UG-37.1. The software calculates the required thickness (for reinforcement conditions) based on inside or outside diameter for the following vessel components:
Component |
Paragraph |
Limitations Per UW-37 |
Cylinder |
UG-27 (c) (1) |
None |
Elliptical Head |
UG-32 (d) (1) |
Nozzle concentric within 0.8D |
Torispherical Head |
UG-32 (e) (1) |
Nozzle in spherical portion |
Spherical Head or Shell |
UG-27 (d) (3) |
None |
Conical |
UG-27 (g) |
None |
The software evaluates nozzles at any reasonable angle from the perpendicular, allowing evaluation of off angle, hillside, or tangential nozzles.
Nozzles account for the internal corrosion allowance. You enter actual thickness and corrosion allowance, and the software adjusts thicknesses and diameters when making calculations for the corroded condition. Nozzles also performs UCS-66 MDMT calculations for nozzles.