Chapter 8, Problem 41P

8–41 to

8–44 For the pressure vessel defined in the problem specified in the table, redesign the bolt specifications to satisfy all of the following requirements.

• Use coarse-thread bolts selecting a class from Table 8–11 for Probs. 8–41 and 8–43, or a grade from Table 8–9 for Probs. 8–42 and 8–44.
• To ensure adequate gasket sealing around the bolt circle, use enough bolts to provide a maximum center-to-center distance between bolts of four bolt diameters.
• Obtain a joint stiffness constant C between 0.2 and 0.3 to ensure most of the pressure load is carried by the members.
• The bolts may be reused, so the yielding factor of safety should be at least 1.1.
• The overload factor and the joint separation factor should allow for the pressure to exceed the expected pressure by 15 percent.

Problem Number	Originating Problem Number
8–41	8–33
8–42	8–34
8–43	8–35
8–44	8–36

Table A–17, then determine the yielding factor of safety n_p, the load factor n_L, and the joint separation factor n₀.

Repeat the requirements for the problem specified in the table if the bolts and nuts are replaced with cap screws that are threaded into tapped holes in the cast-iron cylinder.