Question 8.2: A seamless cylindrical shell with an outside diameter of 30....
A seamless cylindrical shell with an outside diameter of 30.0 in. is butt-welded to seamless ellipsoidal heads. The circumferential seams are not X-rayed. Find the required shell thickness if the allowable stress is 15,000 psi and the internal design pressure is 250 psi. Use Section VIII, Division 1 rules.
From Appendix J, with a value of E =1.0 (seamless shell), the allowable circumferential stress must be reduced to 85%, since the circumferential seams are not X-rayed.
From Appendix I, the required thickness equation in terms of outside radius is given by
t=\frac{P R}{S E+0.4 P}or
t=\frac{250 \times 15}{(15,000 \times 0.85)(1.0)+(0.4 \times 250)}t = 0.29 in.
Related Answered Questions
Question: 8.3
Verified Answer:
From Figures 8.6 and 8.7 and Eq. (5.1), the membra...
Question: 8.9
Verified Answer:
\frac{R_{ o }}{t}=\frac{72}{0.5}=144[/late...
Question: 8.8
Verified Answer:
\frac{L}{R_{ o }}=5.60, \quad \frac{D_{ o ...
Question: 8.7
Verified Answer:
\frac{D_{ o }}{t}=84, \quad \frac{L}{r}=4....
Question: 8.6
Verified Answer:
Let
t = 0.1875 in., \frac{L}{D_{ o }}[/lat...
Question: 8.5
Verified Answer:
Let t =1.25 in.
\frac{L}{D_{ o }}=3.0, \qu...
Question: 8.4
Verified Answer:
(a) Assume
t=\frac{3}{8} \text { in }[/lat...
Question: 8.1
Verified Answer:
From Appendix J, a value of E =0.85 is obtained. F...