Question

Two sections of pipe are flange connected as shown. A total max external load, P=5000 is applied repeatedly. Washers and joint members are made out of steel, E=30Mpsi. (Pls show work for all prob.)

Thread fasteners:

N=8 ?1/2-13 UNC SAE grade 8. with a standard hexagon head. Fasteners are to be reused (non-permanent instalation and lubricated.)

A) Factor of Safety against exceeding the fastener's proof strength(np)

B) Factor of safety (nf) for infinite life based on Goodman's fatigue theory

C) Is spacing of fastener appropriate for wrench access and sealing?

Two sections of pipe are flange-connected as shown. A total maximum external load Pmax -5,000 lbf is applied repeatedly. Washers and joint members are made out of steel E 30 Mpsi. All threaded fasteners (N 8) are 1/2-13 UNC SAE grade 8 with standard hexagon head. Fasteners are to be reused (non-permanent installation) and installed lubtricated. Calculate and answer the following a) factor of safety (no) against exceeding the fastener's proof strength b) preload torque c) load factor (nu) to protect against overloading d) factor of safety against joint separation (no) e) factor of safety for infinite life based on Goodman's fatigue theory (n) f) will fasteners yield in the first cycle? 9) will fasteners last infinite life? which of the four factors of safety controls this design? h) is the spacing of fasteners appropriate for wrench access and sealing? i) sketch the load line, Goodman and proof load line on a chart and show values Total of N screws in circular pattern over diameter D, Joint members washer and screws are made out of steel E30 Mps t, washer thickness Seal Weld Top view. Scale: 1 D, Section A-A. Scale: 1 ODppe = 5 in toipe 3/8 in Protal 5,000 Ibf (repeated) Dtange Db 7. in ts .109 in 9.5 in

Answer 1

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