Thickness Flat unstayed heads covers blind Flanges - Boiler Engineering Calculations

ASME - Thickness Flat unstayed heads covers blind Flanges

Thickness Flat unstayed heads covers blind Flanges

MKS: Diameter/Thickness- mm, Pressure/Stress- kg/cm2

SI: Diameter/Thickness- mm, Pressure/Stress- Mpa

FPS: Diameter/Thickness- in, Pressure/Stress- psi

Long Span of Non Circular Head Or Covers (D), D:

Short Span Of Manhole Cover (d):

Shell Design Pressure, P:

kg/cm2

Stress Valus, S:

kg/cm2

Min Thk of Cover, t:

ASME - Thickness Flat unstayed heads covers blind Flanges

The thickness of a blank unstayed dished head with the pressure on the concave side, when it is a segment of a sphere where
L = radius to which the head is dished, measured on the concave side of the head
P = maximum allowable working pressure (hydrostatic head loading need not be included)
S = maximum allowable working stress, using values given in Section II, Part D, Subpart 1, Table 1A
t = minimum thickness of head
w = weld joint strength reduction factor per PG-26