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Thickness of Pipe Blanks Caps Formula and Calculator
Design Thickness of Pipe Blanks Caps Formula and Calculator per. ASME B31.5
The pressure design thickness of permanent blanks (see Fig. 1, 2 and 3) shall be calculated in accordance with eqs. (1) and (2).
t = dg · [ 3 · P / ( 16 · S ) ]1/2
tm = t + c
P = ( t / dg )2 (16 · S ) / 3
t = pressure design thickness, in. (mm).
tm = minimum required blind flange thickness, satisfying requirements for pressure and mechanical, corrosion, and erosion allowances, in. (mm)
dg = inside diameter of gasket for raised or flat (plain) face flanges, or the gasket pitch diameter for retained gasketed flanges, in. (mm).
P = internal design pressure , psi (kPa), or external design pressure , psi (kPa).
S = applicable allowable stress, psi (MPa).
c = sum of the mechanical, corrosion, and erosion allowances, in. (mm)
ASME Blank Type 1
ASME Blank Type 2
ASME Blank Type 3
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