Page 235 - Pressure Vessel Design Manual

Special Designs 213

Reinforcement Required at Large End Due
to Internal Pressure
0 Determine area of ring required, A,..
Table 4-2
A Degrees t, = smaller of (t2 - t,.J or

PJX A
0.001 11 (t,* - &)
0.002 15
0.003 18
0.004 21
0.005 23 A, = 4t,&
0.006 25
0.007 27
0.008 28.5
0.009 30
From ASME Code, Section VIII, Div. 1. Reprinted
by permission. If A,. is negative, the design is adecjuate ;IS is. If A,. is
positive, add a ring.
0 If a ring is required.
Maximum distance to edge of ring:

0 Equic;aknt pre.sswe, P,,.

417 Maximum distance to centroid of ring, L,,:
P,, = P + --
D1,
where 1' iq the worst case, tension, at large end.
0 Determine $ reinjhrcement is required

X = smaller of S,EI or S,E2 Reinforcement Required at Small End Due
Y = greater of S,E, or S,E,. to Internal Pressure

0 Equivalent pressure, P,,.

4v
P,=P+-
A = (from Table 4-2) d,
Note: A = 30" if PJX z 0.009
where V is the worst case, tension, at small end.
If A < a, then reinforcement is required.
If' A a, then no reinforcement is required.
Table 4-3
e Determinu nwtl of reinfiircement required, AI,. A Degrees

V PJX A
0.002 4
0.005 6
0.010 9
0.02 12.5
0.04 17.5
0.08 24
0.1 27
0.125 30
From ASME Code, Section VIII, Div. 1. Reprinted
by permission.