mechengineer
Mechanical
- Apr 19, 2001
- 256
Hi experts,
1. Udder external pressure.
The formula and analysis method are same for both spherical shell and cover (pressure on convex side) as per code. Refer to Appendix 1-6, (g) (1) (-b) =>UG-33 (c) => UG-28 (d).
2. Under internal pressure.
The thickness for spherical shell is UG-27, formula (3). t=PR/(2SE-0.2P)
The spherical cover, pressure on convex side. the required thickness is t=5PL/(6S). Appendix 1-6 formula (1).
Q1. Why does it make the different for the thicknesses of spherical shell and cover under internal pressure?
Q2. Whether 'L' in t=5PL/(6S) shall have a limit for the floating head? If the spherical shape of caver approaches flat plate, "L' will be infinite amount that may not be applicable for the floating head cover.
Thanks for sharing your ideas.
1. Udder external pressure.
The formula and analysis method are same for both spherical shell and cover (pressure on convex side) as per code. Refer to Appendix 1-6, (g) (1) (-b) =>UG-33 (c) => UG-28 (d).
2. Under internal pressure.
The thickness for spherical shell is UG-27, formula (3). t=PR/(2SE-0.2P)
The spherical cover, pressure on convex side. the required thickness is t=5PL/(6S). Appendix 1-6 formula (1).
Q1. Why does it make the different for the thicknesses of spherical shell and cover under internal pressure?
Q2. Whether 'L' in t=5PL/(6S) shall have a limit for the floating head? If the spherical shape of caver approaches flat plate, "L' will be infinite amount that may not be applicable for the floating head cover.
Thanks for sharing your ideas.
