TORISPHERICAL HEAD THICKNESS WITH BOM CALCULATION

Element Type
Element Diameter mm
Straight Face mm
Internal Design Pr. kPa
Internal Design Temp °C
Corrosion Allowance mm
Joint Efficiency
MATERIAL Help
Crown Radius
Knuckle Radius
torispherical
RESULT
Max Allow Stress =
Min Thickness =

An excellent web based tool for Torispherical head thickness calculation under internal pressure. It also gives allowable Stress of material at a desired design temperature. This and many other tool for Pressure Vessel design as per ASME Section VIII Div. 1 would be useful for Static Equipment Engineer.

Torispherical head thickness calculation is based on Appendix 1-4(d) (3) of ASME Section VIII Division 1 2011 edition code book.

Where in Torispherical Head thickness is given by:

t = P*L*M/(2SE – 0.2P)

where,
t = Torispherical head thickness
P = Design pressure
L = Crown Radius
M = 0.25*(3+(L/R)0.5)
R = Knuckle Radius
S = Maximum Allowable Stress at design temperature
E = Joint Efficiency

This tool also calculate head thickness on OD basis as per Appendix 1-4(d)(4) of ASME Section VIII Div. 1, which is

t = P * Lo*M/(2SE +P(M-0.2))

where,
Lo = Outside Crown Radius