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Reg. 188
DISHES END PLATES
Complete hemisphere without stays or other support made of
one or more plates and subject to internal pressure
The maximum working pressure shall be determined by the following
formula : -
| W. P. = |
(t - 2) x S x J
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Eqn.(23) |
| C x R
|
where
W.P. is the working pressure in lbs per square inch,
t is the thickness of the end plate in 32nds of an inch,
S is the minimum tensile breaking strength of the end plates
in tons per
square inch, or whatever strength is allowed for them,
J is the least percentage of strength of the riveted joints
of the plates
forming the hemisphere or securing it to be cylindrical shell,
R is the inner radius of curvature in inches.
C for single riveting is 3.3,
C for double riveting is 2.9,
C for treble riveting is 2.83. |
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