Nozzle Reinforcement Calculator - Design Calculators

Nozzle Reinforcement Calculator (ASME VIII Div 1)

This calculator determines the adequacy of nozzle reinforcement in pressure vessels based on simplified principles of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, Part UG-37 (Area of Reinforcement). It compares the required area of reinforcement against the area available from the vessel, nozzle neck, and any reinforcement pad.

Key Assumptions and Limitations:

Assumes a circular opening in a cylindrical or spherical shell.
Simplified calculation of areas. Does not account for all nuances like weld contributions, specific limits of reinforcement beyond basic dimensions, or multiple openings interactions as per the full ASME code.
Ignores external loads and moment analysis (which would require Part UG-45, Appendix 1-10, etc.).
Material properties like allowable stress are assumed based on common values or directly input.
This tool is for preliminary assessment only. A detailed design must always be conducted by a qualified engineer using the full ASME BPVC code.

Units: Ensure consistency. If you use mm for length, use MPa for pressure and stress. If inches, use psi.

Unit System:

Joint Efficiency (E):

Vessel Parameters

Shell Material Allowable Stress (S) (MPa):

Vessel Inside Diameter (ID) (mm):

Vessel Nominal Thickness (t) (mm):

Corrosion Allowance (CA_vessel) (mm):

Design Pressure (P) (MPa):

Vessel Type:

Nozzle Parameters

Nozzle Material Allowable Stress (S_n) (MPa):

Nozzle Outside Diameter (OD) (mm):

Nozzle Nominal Thickness (t_n) (mm):

Corrosion Allowance (CA_nozzle) (mm):

Nozzle Projection Outside (h_proj) (mm):

Nozzle Projection Inside (h_in) (mm):

Reinforcement Pad Parameters (Optional)

Pad Thickness (t_p) (mm):

Pad Outside Diameter (OD_p) (mm):

Pad Material Allowable Stress (S_p) (MPa):

Calculation Results

Parameter	Value